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Welcome to the Mersenne Wiki,
the encyclopedia that registered users can edit.
433 articles in English

This wiki is for the Great Internet Mersenne Prime Search (GIMPS), a distributed computing project dedicated to finding Mersenne primes. However, information about related projects may also be contributed, expanding any of the 433 existing articles or creating new ones.

The largest known prime to date is 277,232,917 - 1 (M50) discovered by Jonathan Pace on December 26, 2017. See Mersenne News.


Some pages on this wiki have been categorized.

Special Events





GIMPS Related Projects
Lone Mersenne Hunters 100 Million Digit Prefactor Project Operation Billion Digits
Other Prime Searching Projects
12121 Search 27121 Search PSearch
Riesel Sieve Sierpinski/Riesel Base 5 Twin Prime Search
Riesel Prime Search Prime Sierpinski Project No Prime Left Behind
Other Factoring Projects
Mersenneplustwo Factorizations NFSNET Home Primes Search
Aliquot Sequences Search (see forum) ElevenSmooth Cunningham Tables
Factoring Database
Defunct Projects
MasterPrime 2006 15k Search


Feel free to post your name here and eventually what you've done.

To all users!

Please remember to create an account and log in to edit pages. You can play around in the Sandbox. Remember that your changes will not be saved until you request and receive an account here.

Unfortunately, account creation by new users is now disabled due to excessive vandalism. However, anyone desiring editing status can request an account on the GIMPS forum.