Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
215518357Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
5559744939134504681512168.92017-12-26 19:07:22
History
DateUserTypeResult
2025-03-14James HeinrichF
Factor: 555974493913450468151 / TF: 68-70
2017-12-26NickF
Factor: 555974493913450468151 / TF: 68-69
2016-09-08Gimi.HNF
no factor from 2^67 to 2^68
2015-10-25MrBookwormNF
no factor from 2^66 to 2^67
2012-07-07america64NF
no factor from 2^65 to 2^66
2011-05-27Joe BauerNF
no factor from 2^64 to 2^65
2010-05-19Architects CubedNF
no factor from 2^63 to 2^64