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
243396977Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1231295660255750076712166.72015-12-08 13:09:26
History
DateUserTypeResult
2015-12-08NickF
Factor: 123129566025575007671 / TF: 66-67
2013-10-22gucsNF
no factor from 2^65 to 2^66
2011-07-14PiepenNF
no factor from 2^64 to 2^65