Million-digit prime found


Curtis Cooper, a mathematician and computer science professor at the University of Central Missouri, has discovered the largest known prime number to date on January 25. Several people verified the discovery using different hardware and software by the beginning of February and it was announced on Tuesday. Cooper found the prime as a participant in the distributed computing project known as the Great Internet Mersenne Prime Search, or GIMPS. Cooper runs the GIMPS client, called Prime95, on an estimated 1,000 computers at the university.

The number was first reported to the GIMPS server on January 25 from a university computer which had been running 39 days non-stop. However as for any Mersenne prime candidates, the discovery was announced after several people have verified the number using different hardware and software. The three independent verifications took from three to seven days of computation on powerful hardware.

A prime number is a positive integer greater than 1 that can only be evenly divided by 1 and itself. The first few prime numbers are 2, 3, 5, 7, 11, 13, 17 and 19. 77 (for example) is not prime because it is a product of 7 and 11. The newly discovered prime is expressed as 257,885,161 − 1 and has 17,425,170 digits. It is a specific type of prime number called a Mersenne prime, which are of the form 2p − 1. The exponent enter site diy viagra source site click no homework speech my purpose in life essay essay help forums writing a persuasive paper how to edit research paper help with writing a paper for college refugium essay premarin without prescription help drive assignment cd rom cover letter for entry level administrative assistant job custom dissertation generic viagra online paypal kamagra work synthesis summary essay example top research proposal ghostwriter site for school go here persuasive essay on composition easyjet vluchten did oedipus deserve his fate essay thesis database cbs research proposal content lipitor side effects vision material culture essay p must be prime for the number to be prime. As of February 2013, there are only 48 known Mersenne primes.

George Woltman developed and founded GIMPS, the longest known continuously running computer project, in 1996. Cooper as a participant had previously discovered two other Mersenne primes, 230,402,457 − 1 in December 2005 and 232,582,657 − 1 in September 2006, with fellow professor Steven Boone. This latest discovery ends an intermission of almost four years; the previous Mersenne prime was found in April 2009.

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