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
248391307Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
2908896512688606145612168.02016-10-20 21:29:07
History
DateUserTypeResult
2016-10-20demfloroF
Factor: 290889651268860614561 / TF: 67-68
2015-12-13brainboostNF
no factor from 2^66 to 2^67
2013-11-18Yan Ruimin ChinaNF
no factor from 2^65 to 2^66
2011-07-24RichardNF
no factor from 2^64 to 2^65