The Great Internet Mersenne Prime Search (GIMPS) is an organization of over 75,000 number theory enthusiasts, running over 240,000 computers, doing over 7 trillion floating point operations per second or the equivalent of 587 CPU computer years (P-90) per day, that seeks to utilize the power and idle CPU time of thousands of small computers to find large Mersenne primes.

George Woltman, a retired Orlando computer programmer, wrote the software and established GIMPS more than eight years ago.

Scott Kurowski, a San Jose software development manager, provided the networking tools to automate the GIMPS system using Entropia's PrimeNet server. The PrimeNet server distributes Mersenne numbers and collects results via the Internet to and from thousands of computers running copies of George's program.

The goal of GIMPS is to test every Mersenne number with an exponent less than 20,500,000.