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
204943729Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
19558987847851524888232270.72019-10-23 16:00:30
History
DateUserTypeResult
2019-10-23Alexander TsupkoF
Factor: 1955898784785152488823
2019-01-15ANONYMOUSNF
no factor from 2^69 to 2^70
2016-12-26nate.andersNF
no factor from 2^68 to 2^69
2016-08-26Kenny CrumseyNF
no factor from 2^67 to 2^68
2015-10-02sannerud.comNF
no factor from 2^66 to 2^67
2013-07-27Juergen KampmeierNF
no factor from 2^65 to 2^66
2011-05-08Damian SilvestreNF
no factor from 2^64 to 2^65