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
977215531Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
97721553111033.22008-06-01 01:29:12
20439991117778241531960.82015-12-23 16:10:00
History
DateUserTypeResult
2015-12-23ConductorF
Factor: 2043999111777824153 / TF: 1-62