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
207421231Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1333928361315190390012166.92015-10-24 12:31:54
History
DateUserTypeResult
2015-10-24ConductorF
Factor: 133392836131519039001 / TF: 66-67
2013-08-03HardyP GermanyNF
no factor from 2^65 to 2^66
2011-05-11Mr-PlonkNF
no factor from 2^64 to 2^65