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
977035573Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
2970188141931238.12008-05-27 23:27:38
15528909992661221211960.42015-12-22 19:38:00
History
DateUserTypeResult
2015-12-22ConductorF
Factor: 1552890999266122121 / TF: 1-62