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
207209281Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
995602793812802074632066.42015-10-14 08:35:38
History
DateUserTypeResult
2015-10-14ConductorF
Factor: 99560279381280207463 / TF: 66-67
2013-08-02Chang Chia-TcheNF
no factor from 2^65 to 2^66
2011-05-12RichardNF
no factor from 2^64 to 2^65