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
977038661Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
1172446393211236.82008-05-27 23:29:51
28205748528309767291961.32015-12-22 19:38:33
History
DateUserTypeResult
2015-12-22ConductorF
Factor: 2820574852830976729 / TF: 1-62