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
207212437Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
997415470063197069772066.42015-10-14 10:32:34
History
DateUserTypeResult
2015-10-14ConductorF
Factor: 99741547006319706977 / TF: 66-67
2013-08-07RichardNF
no factor from 2^65 to 2^66
2011-05-12RichardNF
no factor from 2^64 to 2^65