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
399996647Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
2488082564857070248632167.82016-09-08 14:34:47
History
DateUserTypeResult
2016-09-08Alex_soldierF
Factor: 248808256485707024863 / TF: 67-68*
2016-04-09DerekNF
no factor from 2^66 to 2^67
2014-06-08firereddNF
no factor from 2^65 to 2^66
2010-05-11Architects CubedNF
no factor from 2^64 to 2^65