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
56242757Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
407391523891617289008388572685.12012-03-23 14:32:30
History
DateUserTypeResult
2022-06-27LordJuliusNF
no factor from 2^60 to 2^63
2012-03-23NickF-PM1
Factor: 40739152389161728900838857
2011-08-11symalladNF
no factor from 2^70 to 2^71
2011-06-05JMGarciaNF
no factor from 2^69 to 2^70
2011-04-15calc4everNF
no factor from 2^68 to 2^69
2009-11-25kevshawNF
no factor from 2^67 to 2^68
2008-07-10Sturle SundeNF
no factor from 2^66 to 2^67
2008-07-10Sturle SundeNF
no factor from 2^65 to 2^66
2008-07-10Sturle SundeNF
no factor from 2^64 to 2^65
2008-07-09James HeinrichNF
no factor from 2^63 to 2^64