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
221908727Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
789665530930927657912066.12015-10-29 20:00:16
History
DateUserTypeResult
2015-10-29ConductorF
Factor: 78966553093092765791 / TF: 66-67
2013-09-09HardyP GermanyNF
no factor from 2^65 to 2^66
2011-06-07tscNF
no factor from 2^64 to 2^65