Curtis Cooper (mathematician)
Encyclopedia
Curtis Niles Cooper is an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 mathematician
Mathematician
A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

. He currently is a professor at the University of Central Missouri
University of Central Missouri
The University of Central Missouri is a four-year public institution in Warrensburg, Missouri.- History :...

, in the Department of Mathematics and Computer Science.

Using software from the GIMPS project, Cooper and Steven Boone found the 43rd known Mersenne prime
Mersenne prime
In mathematics, a Mersenne number, named after Marin Mersenne , is a positive integer that is one less than a power of two: M_p=2^p-1.\,...

 on their 700 PC
Personal computer
A personal computer is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator...

 cluster on December 15, 2005. The prime, 230402457 − 1, is 9,152,052 digits long and is the ninth Mersenne prime for GIMPS.

Cooper and Boone became the first GIMPS contributors to find two primes when they also found the 44th known Mersenne prime, 232582657 − 1, which has 9,808,358 digits (or M32582657 for short). This prime was discovered on September 4, 2006 using a PC cluster of over 850 machines. This is the tenth Mersenne prime for GIMPS.

Cooper's own work has mainly been in elementary number theory
Number theory
Number theory is a branch of pure mathematics devoted primarily to the study of the integers. Number theorists study prime numbers as well...

, especially work related to digital representations of numbers. He collaborated extensively with Robert E. Kennedy. They have worked with Niven numbers, among other results, showing that no 21 consecutive integers can all be Niven numbers, and introduced the notion of tau numbers, numbers whose total number of divisors are itself a divisor of the number. Independent of Kennedy, Cooper has also done work about generalizations of geometric series, and their application to probability
Probability
Probability is ordinarily used to describe an attitude of mind towards some proposition of whose truth we arenot certain. The proposition of interest is usually of the form "Will a specific event occur?" The attitude of mind is of the form "How certain are we that the event will occur?" The...

.

Cooper is also the editor of the publication Fibonacci Quarterly
Fibonacci Quarterly
As the primary publication of The Fibonacci Association, The Fibonacci Quarterly provides a focus for worldwide interest in the Fibonacci number sequence and related mathematics. Published since 1963, its founding editors were Verner Emil Hoggatt, Jr. and Alfred Brousseau...

.

External links

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