41 (number)
Encyclopedia
41 is the natural number
Natural number
In mathematics, the natural numbers are the ordinary whole numbers used for counting and ordering . These purposes are related to the linguistic notions of cardinal and ordinal numbers, respectively...

 following 40
40 (number)
40 is the natural number following 39 and preceding 41.Despite being related to the word "four" , 40 is spelled "forty", and not "fourty"...

 and preceding 42
42 (number)
42 is the natural number immediately following 41 and directly preceding 43. The number has received considerable attention in popular culture as a result of its central appearance in The Hitchhiker's Guide to the Galaxy as the "Answer to the Ultimate Question of Life, the Universe, and...

.

In mathematics

Forty-one is the 13th smallest prime number
Prime number
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. A natural number greater than 1 that is not a prime number is called a composite number. For example 5 is prime, as only 1 and 5 divide it, whereas 6 is composite, since it has the divisors 2...

. The next is forty-three, with which it comprises a twin prime
Twin prime
A twin prime is a prime number that differs from another prime number by two. Except for the pair , this is the smallest possible difference between two primes. Some examples of twin prime pairs are , , , , and...

. It is also the sum of the first six prime numbers (2 + 3 + 5 + 7 + 11 + 13), and the sum of three primes (11 + 13 + 17).

Forty-one is also the 12th supersingular prime
Supersingular prime (moonshine theory)
In the mathematical branch of moonshine theory, a supersingular prime is a certain type of prime number.Namely, a supersingular prime is a prime divisor of the order of the Monster group M, the largest of the sporadic simple groups...

, a Sophie Germain prime
Sophie Germain prime
In number theory, a prime number p is a Sophie Germain prime if 2p + 1 is also prime. For example, 23 is a Sophie Germain prime because it is a prime and 2 × 23 + 1 = 47, and 47 is also a prime number...

 and a Newman–Shanks–Williams prime. 41 is the smallest Sophie Germain prime to start a Cunningham chain
Cunningham chain
In mathematics, a Cunningham chain is a certain sequence of prime numbers. Cunningham chains are named after mathematician A. J. C. Cunningham. They are also called chains of nearly doubled primes....

 of the first kind of three terms, {41, 83, 167}. It is an Eisenstein prime
Eisenstein prime
In mathematics, an Eisenstein prime is an Eisenstein integerz = a + b\,\omega\qquadthat is irreducible in the ring-theoretic sense: its only Eisenstein divisors are the units , a + bω itself and its associates.The associates and the complex conjugate...

, with no imaginary part and real part of the form 3n − 1. 41 is a Proth prime as it is  5 × 23 + 1.

The number figures in the polynomial
Polynomial
In mathematics, a polynomial is an expression of finite length constructed from variables and constants, using only the operations of addition, subtraction, multiplication, and non-negative integer exponents...

 f(n) = n2 + n + 41
Formula for primes
In number theory, a formula for primes is a formula generating the prime numbers, exactly and without exception. No such formula which is easily computable is presently known...

, which yields primes for −40 ≤ n < 40. This is also called the lucky number of Euler Prime. It is the biggest of such primes.

Forty-one is the sum of two squares, 42 + 52. Adding up the sums of divisors for 1 through 7 yields 41.

41 is the smallest integer whose reciprocal has a 5-digit repetend. That is a consequence of the fact that 41 is a factor of 99999.

It is a centered square number
Centered square number
In elementary number theory, a centered square number is a centered figurate number that gives the number of dots in a square with a dot in the center and all other dots surrounding the center dot in successive square layers. That is, each centered square number equals the number of dots within a...

.

In astronomy

  • Messier object
    Messier object
    The Messier objects are a set of astronomical objects first listed by French astronomer Charles Messier in 1771. The original motivation of the catalogue was that Messier was a comet hunter, and was frustrated by objects which resembled but were not comets...

     M41
    Messier 41
    Messier 41 is an open cluster in the Canis Major constellation. It was discovered by Giovanni Batista Hodierna before 1654 and was perhaps known to Aristotle about 325 BC. M41 lies about four degrees almost exactly south of Sirius...

    , a magnitude 5.0 open cluster
    Open cluster
    An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist...

     in the constellation
    Constellation
    In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....

     Canis Major
    Canis Major
    Canis Major is one of the 88 modern constellations, and was included in the 2nd-century astronomer Ptolemy's 48 constellations. Its name is Latin for 'greater dog', and is commonly represented as one of the dogs following Orion the hunter...

    .
  • The New General Catalogue
    New General Catalogue
    The New General Catalogue of Nebulae and Clusters of Stars is a well-known catalogue of deep sky objects in astronomy. It contains 7,840 objects, known as the NGC objects...

     object NGC 41, a spiral galaxy
    Spiral galaxy
    A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as...

     in the constellation
    Constellation
    In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....

     Pegasus
    Pegasus (constellation)
    Pegasus is a constellation in the northern sky, named after the winged horse Pegasus in Greek mythology. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations.-Stars:...

    .
  • The Saros number of the solar eclipse
    Solar eclipse
    As seen from the Earth, a solar eclipse occurs when the Moon passes between the Sun and the Earth, and the Moon fully or partially blocks the Sun as viewed from a location on Earth. This can happen only during a new moon, when the Sun and the Moon are in conjunction as seen from Earth. At least...

     series which began on May 28, 1588 BC and ended on July 5, 308 BC. The duration of Saros series 41 was 1280.1 years, and it contained 72 solar eclipses.
  • The Saros number of the lunar eclipse
    Lunar eclipse
    A lunar eclipse occurs when the Moon passes behind the Earth so that the Earth blocks the Sun's rays from striking the Moon. This can occur only when the Sun, Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a...

     series which began on March 18, 1268 BC and ended on May 6 AD 30
    30
    Year 30 was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Vinicius and Longinus...

    . The duration of Saros series 41 was 1298.1 years, and it contained 73 lunar eclipses.

In music

  • Symphony No. 41
    Symphony No. 41 (Mozart)
    Wolfgang Amadeus Mozart completed his Symphony No. 41 in C major, K. 551, on 10 August 1788. It was the last symphony that he composed.The work is nicknamed the Jupiter Symphony...

    , the last symphony of Wolfgang Amadeus Mozart
    Wolfgang Amadeus Mozart
    Wolfgang Amadeus Mozart , baptismal name Johannes Chrysostomus Wolfgangus Theophilus Mozart , was a prolific and influential composer of the Classical era. He composed over 600 works, many acknowledged as pinnacles of symphonic, concertante, chamber, piano, operatic, and choral music...

     (note: '37' is not in the canon).
  • "#41
    41 (song)
    "#41" is a song by the Dave Matthews Band, featured on the 1996 album Crash.-Song history:"#41" was originally written by Dave Matthews as a reply to lawsuits brought forth by Ross Hoffman, a former associate and manager of the band...

    ", a song by Dave Matthews Band
    Dave Matthews Band
    Dave Matthews Band, sometimes shortened to DMB, is a U.S. rock band formed in Charlottesville, Virginia in 1991. The founding members were singer-songwriter and guitarist Dave Matthews, bassist Stefan Lessard, drummer/backing vocalist Carter Beauford and saxophonist LeRoi Moore. Boyd Tinsley was...

    .
  • The band Sum 41
    Sum 41
    Sum 41 is a Canadian rock band from Ajax, Ontario. The band was formed in 1996 and currently consists of members Deryck Whibley , Tom Thacker , Jason McCaslin and Steve Jocz .In 1999, the band signed an international record deal with Island Records...

    .
  • The number of times Paul McCartney
    Paul McCartney
    Sir James Paul McCartney, MBE, Hon RAM, FRCM is an English musician, singer-songwriter and composer. Formerly of The Beatles and Wings , McCartney is listed in Guinness World Records as the "most successful musician and composer in popular music history", with 60 gold discs and sales of 100...

     sings the phrase "Let It Be" in the Beatles #1 hit Let It Be
    Let It Be (song)
    "Let It Be" is a song by The Beatles, released in March 1970 as a single, and as the title track of their album Let It Be. It was written by Paul McCartney, but credited to Lennon–McCartney. It was their final single before McCartney announced his departure from the band...

    .
  • American Skin (41 Shots)
    American Skin (41 Shots)
    "American Skin " is a song written by Bruce Springsteen, inspired by the police shooting death of Amadou Diallo. Springsteen first performed it in concert in Atlanta on June 4, 2000, the final concert before the tour's final 10-show run at New York City's Madison Square Garden, where it was also...

     is a song by Bruce Springsteen
    Bruce Springsteen
    Bruce Frederick Joseph Springsteen , nicknamed "The Boss," is an American singer-songwriter who records and tours with the E Street Band...

     about an immigrant, murder victim who was shot 41 times by the NYPD

In literature

  • A number frequently referred to in Arthur C. Clarke
    Arthur C. Clarke
    Sir Arthur Charles Clarke, CBE, FRAS was a British science fiction author, inventor, and futurist, famous for his short stories and novels, among them 2001: A Space Odyssey, and as a host and commentator in the British television series Mysterious World. For many years, Robert A. Heinlein,...

    's series of books known as the Rama Cycle. Michael O'Toole's password for the Trinity operation is heavily encoded with the number 41.

In film

  • The name of an independent documentary about Nicholas O'Neill
    Nicholas O'Neill
    Nicholas O'Neill was the youngest of the 100 victims of The Station nightclub fire, which occurred in West Warwick, Rhode Island.. He had turned 18 in January of that year...

    , the youngest victim of the Station nightclub fire.
  • Charlton Heston
    Charlton Heston
    Charlton Heston was an American actor of film, theatre and television. Heston is known for heroic roles in films such as The Ten Commandments, Ben-Hur for which he won the Academy Award for Best Actor, El Cid, and Planet of the Apes...

    's designation as a galley slave in the film Ben-Hur
    Ben-Hur (1959 film)
    Ben-Hur is a 1959 American epic film directed by William Wyler and starring Charlton Heston in the title role, the third film adaptation of Lew Wallace's 1880 novel Ben-Hur: A Tale of the Christ. The screenplay was written by Karl Tunberg, Gore Vidal, and Christopher Fry. The score was composed by...

    .
  • The code number given to Tetsuo Shima by scientists in the manga
    Manga
    Manga is the Japanese word for "comics" and consists of comics and print cartoons . In the West, the term "manga" has been appropriated to refer specifically to comics created in Japan, or by Japanese authors, in the Japanese language and conforming to the style developed in Japan in the late 19th...

     and 1988 film
    Film
    A film, also called a movie or motion picture, is a series of still or moving images. It is produced by recording photographic images with cameras, or by creating images using animation techniques or visual effects...

     Akira
    Akira (film)
    is a 1988 Japanese animated cyberpunk science fiction film directed by Katsuhiro Otomo, written by Otomo and Izo Hashimoto, and starring the voices of Mitsuo Iwata, Nozomu Sasaki, Mami Koyama and Taro Ishida. The screenplay is based on Otomo's manga Akira....

    .
  • Jonathan Pryce
    Jonathan Pryce
    Jonathan Pryce, CBE is a Welsh stage and film actor and singer. After studying at the Royal Academy of Dramatic Art and meeting his longtime partner English actress Kate Fahy in 1974, he began his career as a stage actor in the 1970s...

    's destination level for his apartment in Terry Gilliam
    Terry Gilliam
    Terrence Vance "Terry" Gilliam is an American-born British screenwriter, film director, animator, actor and member of the Monty Python comedy troupe. Gilliam is also known for directing several films, including Brazil , The Adventures of Baron Munchausen , The Fisher King , and 12 Monkeys...

    's Brazil
    Brazil (film)
    Brazil is a 1985 British science fiction fantasy/black comedy film directed by Terry Gilliam. It was written by Gilliam, Charles McKeown, and Tom Stoppard and stars Jonathan Pryce. The film also features Robert De Niro, Kim Greist, Michael Palin, Katherine Helmond, Bob Hoskins, and Ian Holm...

    .
  • Billy Cole's jersey number in the Tony Scott
    Tony Scott
    Anthony D. L. "Tony" Scott is an English film director. His films include Top Gun, Beverly Hills Cop II, The Last Boy Scout, True Romance, Crimson Tide, Enemy of the State, Spy Game, Man on Fire, Déjà Vu, The Taking of Pelham 123, and Unstoppable...

     film The Last Boy Scout
    The Last Boy Scout
    The Last Boy Scout is a 1991 action film starring Bruce Willis as a former Secret Service agent, now working as a private detective, and Damon Wayans as a retired professional football player. The two join forces to solve the murder of Wayans' character’s girlfriend . The movie was produced by...

    .
  • In the feature film The Matrix
    The Matrix
    The Matrix is a 1999 science fiction-action film written and directed by Larry and Andy Wachowski, starring Keanu Reeves, Laurence Fishburne, Carrie-Anne Moss, Joe Pantoliano, and Hugo Weaving...

    , Morpheus is aggressively questioned in the 41st floor of the government building, in reference to the murder of Amadou Diallo
    Amadou Diallo
    Amadou Diallo was a 23-year-old Guinean immigrant in New York City who was shot and killed on February 4, 1999 by four New York City Police Department plain-clothed officers: Sean Carroll, Richard Murphy, Edward McMellon and Kenneth Boss. The four officers fired a total of 41 shots...

    .
  • The victim number that appears on Dr. Lucy Lynskey's forehead in the Peter Jackson
    Peter Jackson
    Sir Peter Robert Jackson, KNZM is a New Zealand film director, producer, actor, and screenwriter, known for his The Lord of the Rings film trilogy , adapted from the novel by J. R. R...

     film The Frighteners
    The Frighteners
    The Frighteners is a 1996 comedy horror film directed by Peter Jackson and co-written with his wife, Fran Walsh. The film's cast includes Michael J. Fox, Trini Alvarado, John Astin, Jeffrey Combs, Dee Wallace, Jake Busey and Chi McBride...

    .
  • The precinct number that appears on the NYC police car in the film Ghostbusters
    Ghostbusters
    Ghostbusters is a 1984 American science fiction comedy film directed by Ivan Reitman and written by Dan Aykroyd and Harold Ramis. The film stars Bill Murray, Dan Aykroyd, Sigourney Weaver, Harold Ramis, and Rick Moranis and follows three eccentric parapsychologists in New York City, who start a...

    during the earthquake moment of the film's climax.
  • The district number where the "zombie virus" reappears in the film Doomsday
    Doomsday (film)
    Doomsday is a 2008 British science fiction film written and directed by Neil Marshall. The film takes place in the future. Scotland has been quarantined because of a deadly virus. When the virus is found in London, political leaders send a team led by Major Eden Sinclair to Scotland to find a...

    .
  • The distance in kilometers when Ripcord and Duke from the 2009 film G.I. Joe: The Rise of Cobra realize that their escort mission is in jeopardy.
  • The restricted penthouse level of Lady Tanaka's Yakuza hideout in The Punisher (1989 film)
    The Punisher (1989 film)
    The Punisher is a 1989 film starring Dolph Lundgren as Frank Castle, directed by Mark Goldblatt from a screenplay by Boaz Yakin. It is loosely based on the Marvel Comics' character The Punisher. The film changes many details of the comic book origin and the main character does not wear the...

    .
  • In the 1959 Alfred Hitchcock
    Alfred Hitchcock
    Sir Alfred Joseph Hitchcock, KBE was a British film director and producer. He pioneered many techniques in the suspense and psychological thriller genres. After a successful career in British cinema in both silent films and early talkies, Hitchcock moved to Hollywood...

     film North by Northwest
    North by Northwest
    North by Northwest is a 1959 American thriller film directed by Alfred Hitchcock, starring Cary Grant, Eva Marie Saint and James Mason, and featuring Leo G. Carroll and Martin Landau...

    , Cary Grant
    Cary Grant
    Archibald Alexander Leach , better known by his stage name Cary Grant, was an English actor who later took U.S. citizenship...

     is attacked by a crop-dusting airplane at Prairie Corners on Highway 41.
  • The age at which writer/director Tom Graeff
    Tom Graeff
    Thomas Lockyear "Tom" Graeff was an American screenwriter, director and actor. He is known for the 1959 b-movie Teenagers from Outer Space.-Early life:...

     (of Teenagers from Outer Space
    Teenagers from Outer Space
    Teenagers from Outer Space is a 1959 science-fiction film about an extraterrestrial space ship landing on Earth to use it as a farm for its food supply. The crew of the ship includes teenagers, two of whom oppose each other in their activities. The independent film was originally distributed by...

    fame) committed suicide.
  • The truck driver number, in the Knight Rider (1982 TV series) pilot, who agrees to a $25,000 cash reward for 'smashing head on' into Michael Knight and KITT
    KITT
    KITT is the short name of two fictional characters from the adventure TV series Knight Rider. While having the same acronym, the KITTs are two different entities: one known as the Knight Industries Two Thousand, which appeared in the original TV series Knight Rider, and the other as the Knight...

    during the finale.
  • In The Expendables (2010 film)
    The Expendables (2010 film)
    The Expendables is a 2010 American ensemble action film written by David Callaham and Sylvester Stallone, and directed by Stallone. Filming began on March 28, 2009, in Rio de Janeiro, New Orleans, and Los Angeles, and the film was released in theaters on August 13, 2010 in North America.The film is...

    , the number of soldiers actor Eric Roberts
    Eric Roberts
    Eric Anthony Roberts is an American actor. His career began with King of the Gypsies , earning a Golden Globe nomination for best actor debut. He starred as the protagonist in the 1980 dramatisation of Willa Cather's 1905 short story, Paul's Case...

     laments to his subordinates about having been killed by star Sylvester Stallone
    Sylvester Stallone
    Michael Sylvester Gardenzio Stallone , commonly known as Sylvester Stallone, and nicknamed Sly Stallone, is an American actor, filmmaker, screenwriter, film director and occasional painter. Stallone is known for his machismo and Hollywood action roles. Two of the notable characters he has portrayed...

     in his escape from their island.
  • The reported number of survivors aboard the USS Neptune, in the 1978 disaster film Gray Lady Down
    Gray Lady Down
    Gray Lady Down is a 1978 disaster film by Universal Studios starring Charlton Heston, David Carradine, Stacy Keach, Ned Beatty, Ronny Cox, and features the first film role for a young Christopher Reeve...

    , upon its initial depth position of 1,450 feet.

In sports

  • The retired number of the back of the uniform worn by Hall of Famers Tom Seaver
    Tom Seaver
    George Thomas "Tom" Seaver , nicknamed "Tom Terrific" and "The Franchise", is a former Major League Baseball pitcher. He pitched from 1967-1986 for four different teams in his career, but is noted primarily for his time with the New York Mets...

     of the New York Mets
    New York Mets
    The New York Mets are a professional baseball team based in the borough of Queens in New York City, New York. They belong to Major League Baseball's National League East Division. One of baseball's first expansion teams, the Mets were founded in 1962 to replace New York's departed National League...

     and by Eddie Mathews
    Eddie Mathews
    Edwin Lee "Eddie" Mathews was an American Major League Baseball third baseman. He is regarded as one of the greatest third basemen ever to play the game.-Early life:...

     of the Atlanta Braves
    Atlanta Braves
    The Atlanta Braves are a professional baseball club based in Atlanta, Georgia. The Braves are a member of the Eastern Division of Major League Baseball's National League. The Braves have played in Turner Field since 1997....

    .
  • Worn by and retired for Brian Piccolo, running back for the Chicago Bears. Died June 16, 1970 of embryonal cell carcinoma
    Carcinoma
    Carcinoma is the medical term for the most common type of cancer occurring in humans. Put simply, a carcinoma is a cancer that begins in a tissue that lines the inner or outer surfaces of the body, and that generally arises from cells originating in the endodermal or ectodermal germ layer during...

    .
  • The race number worn by Sir Roger Bannister when he broke the mythical 4-minute mile barrier in 1954.

In religion

  • In Christianity
    Christianity
    Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

    , 41 represents the 39 lashes
    Scourge
    A scourge is a whip or lash, especially a multi-thong type used to inflict severe corporal punishment or self-mortification on the back.-Description:...

     Jesus
    Jesus
    Jesus of Nazareth , commonly referred to as Jesus Christ or simply as Jesus or Christ, is the central figure of Christianity...

     received before the crucifixion
    Crucifixion
    Crucifixion is an ancient method of painful execution in which the condemned person is tied or nailed to a large wooden cross and left to hang until dead...

    , plus one for the spear
    Holy Lance
    The Holy Lance is the name given to the lance that pierced Jesus' side as he hung on the cross in John's account of the Crucifixion.-Biblical references:The lance is mentioned only in the Gospel of John and not in any of the...

     in his side, plus one for the crown of thorns
    Crown of Thorns
    In Christianity, the Crown of Thorns, one of the instruments of the Passion, was woven of thorn branches and placed on Jesus Christ before his crucifixion...

    .

In other fields

  • The model number of the HP-41
    HP-41
    The HP-41C series are programmable, expandable, continuous memory handheld RPN calculators made by Hewlett-Packard from 1979 to 1990. The original model, HP-41C, was the first of its kind to offer alphanumeric display capabilities...

    C/CV/CX.
  • The international direct dialing (IDD) code for Switzerland.
  • C-41 process
    C-41 process
    C-41 is a chromogenic color print film developing process. C-41, also known as CN-16 by Fuji, CNK-4 by Konica, and AP-70 by AGFA, is the most popular film process in use, with most photofinishing labs devoting at least one machine to this development process....

     is the film developing process for 35mm color negative film.
  • George W. Bush
    George W. Bush
    George Walker Bush is an American politician who served as the 43rd President of the United States, from 2001 to 2009. Before that, he was the 46th Governor of Texas, having served from 1995 to 2000....

    's nickname for his father, George H. W. Bush
    George H. W. Bush
    George Herbert Walker Bush is an American politician who served as the 41st President of the United States . He had previously served as the 43rd Vice President of the United States , a congressman, an ambassador, and Director of Central Intelligence.Bush was born in Milton, Massachusetts, to...

    , the 41st President of the United States
    President of the United States
    The President of the United States of America is the head of state and head of government of the United States. The president leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces....

    .
  • Montana
    Montana
    Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

     is the 41st state of the United States.
  • In the 1994 arcade game
    Arcade game
    An arcade game is a coin-operated entertainment machine, usually installed in public businesses such as restaurants, bars, and amusement arcades. Most arcade games are video games, pinball machines, electro-mechanical games, redemption games, and merchandisers...

     Daytona USA
    Daytona USA (arcade game)
    Daytona USA is a 1993 racing video game by Sega. Considered one of the highest grossing arcade games of all time, Daytona USA was Sega's first title to debut on the Sega Model 2 arcade board, and at the time of its 1993 introduction, was considered the most visually detailed 3D arcade racing game...

    , the player racing team, Team Hornet, has a race number of 41. It is also continued in the 1998 arcade game Daytona USA 2
    Daytona USA 2
    Daytona USA 2: Battle on the Edge is an arcade racing game released by Sega in 1998 as a follow up to the extremely successful Daytona USA. The game featured vastly superior graphics, utilizing the Sega Model 3 hardware. The majority of Daytona USA 2 cabinets were released as deluxe models , which...

    , where it is applied to three more player cars. The number 41 does not appear on the player cars on linked cabinets for both games.
  • In Mexico "cuarenta y uno" (41) is slang referring to a homosexual. This is due to the 1901 arrest of 41 homosexuals at a hotel in Mexico City
    Mexico City
    Mexico City is the Federal District , capital of Mexico and seat of the federal powers of the Mexican Union. It is a federal entity within Mexico which is not part of any one of the 31 Mexican states but belongs to the federation as a whole...

     during the government of Porfirio Díaz (1876–1911). See: Dance of the Forty-One
    Dance of the Forty-One
    The Dance of the Forty-One was a society scandal in early 20th-century Mexico, during the presidency of Porfirio Díaz....

  • Municipal Okrug #41, name of Konstantinovskoye Municipal Okrug of Krasnoselsky District of Saint Petersburg
    Saint Petersburg
    Saint Petersburg is a city and a federal subject of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea...

    , Russia, before 2008
  • The number of the French department Loir-et-Cher
    Loir-et-Cher
    Loir-et-Cher is a département in north-central France named after the rivers Loir and Cher.-History:Loir-et-Cher is one of the original 83 departments created during the French Revolution on 4 March 1790. It was created from parts of the former provinces of Orléanais and...

    .
  • The number of members in the U.S. Senate needed to defeat a cloture
    Cloture
    In parliamentary procedure, cloture is a motion or process aimed at bringing debate to a quick end. It is also called closure or, informally, a guillotine. The cloture procedure originated in the French National Assembly, from which the name is taken. Clôture is French for "ending" or "conclusion"...

     vote and sustain a filibuster
    Filibuster
    A filibuster is a type of parliamentary procedure. Specifically, it is the right of an individual to extend debate, allowing a lone member to delay or entirely prevent a vote on a given proposal...

    indefinitely.
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