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
189199651Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1275528848225452414972166.82015-08-25 15:55:15
History
DateUserTypeResult
2015-08-25demfloroF
Factor: 127552884822545241497 / TF: 66-68
2013-06-01Lukin DmitryNF
no factor from 2^65 to 2^66
2011-04-07sannerud.comNF
no factor from 2^64 to 2^65
2010-08-01Mark GrantNF
no factor from 2^63 to 2^64