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
193979543Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
2564652756742812658812167.82015-09-12 00:55:15
History
DateUserTypeResult
2015-09-12demfloroF
Factor: 256465275674281265881 / TF: 66-68
2013-06-18OS1NF
no factor from 2^65 to 2^66
2011-04-19SodomNF
no factor from 2^64 to 2^65
2010-08-05lindedNF
no factor from 2^63 to 2^64