Prime95 lets you participate in the Great Internet Mersenne Prime Search. The program uses the computing power of your PC to help in finding of Mersenne prime numbers (a prime number of the form 2^n -1). The latest version is optimized for Intel Haswell series processors (Core i3/i5/i7 4xxx).
v28.5 [Jun 9, 2014]
This latest version of prime95 has been optimized for Intel's new AVX2 instruction set. Owners of Haswell CPUs (Core i3/i5/i7 4xxx) will see a significant performance increase.
