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
208552087Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1243936637786248311832166.82015-10-14 00:55:16
History
DateUserTypeResult
2015-10-14demfloroF
Factor: 124393663778624831183 / TF: 66-68
2013-08-10RichardNF
no factor from 2^65 to 2^66
2011-05-16subgeniusNF
no factor from 2^64 to 2^65