Prime95 30.6 Build 1 (x64)

Mersenne numbers can be proved composite (not p) by either finding a factor or by running a Lucas-Lehmer primality test.
P numbers have long fascinated amateur and professional mathematicians. An integer greater than one is called a p number if its only divisors are one and itself. The first p numbers are 2, 3, 5, 7, 11, etc. For example, the number 10 is not p because it is divisible by 2 and 5.

A Mersenne p is a p of the form 2P-1. The first Mersenne ps are 3, 7, 31, 127, etc. There are only 40 known Mersenne ps.

There are two ways to use this program. The automatic way uses a central server, which we call the PNet server, to get work to do and report your results. Anyone with Internet access, including AOL, CompuServe, and dial-up ISP users should use this method. You do not need a permanent connection to the Internet.

The second method is the manual method. It requires a little more work and monitoring. Recommended for computers with no Internet access or with some kind of firewall problem that prevents the automatic method from working.



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