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
977828171Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
19556563431030.92008-06-01 01:52:48
11215778162403251271960.02015-12-23 19:58:49
History
DateUserTypeResult
2015-12-23ConductorF
Factor: 1121577816240325127 / TF: 1-62