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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Exponent Range:










MnStatusDetails
5069551Factored
FactorDigitsBitsDate
562370208954991254794008572685.52017-07-09 08:40:56
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David A McGough07B39A149025A7040
Bad2001-01-28Northwestern College0F140CED4538DAAF4716727
Verified (Factored)2002-01-02Leon Matthews07B39A149025A7042741812
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-28alpertronF03D15CA9B32E89E1013
Verified2018-01-19kkmrkkblmbrbkF03D15CA9B32E89E14611413
P-1 factors
DateFactorB1B2
2017-07-0956237020895499125479400857150000045000000
History
DateUserTypeResult
2018-01-19kkmrkkblmbrbkC-PRP
M5069551/56237020895499125479400857 : F03D15CA9B32E89E
PRP: Verified
PRP without proof (not generated)
2017-09-28alpertronC-PRP
M5069551/56237020895499125479400857 : F03D15CA9B32E89E
PRP: Verified
PRP without proof (not generated)
2017-07-09mikrF-PM1
Factor: 56237020895499125479400857 / (P-1, B1=1500000, B2=45000000, E=12)
2016-05-22Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-08-02snme2pm1NF
no factor from 2^65 to 2^66
2014-12-14VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-14VictordeHollanderNF
no factor from 2^63 to 2^64
2009-08-13USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-08-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2008-12-30Sturle SundeNF
no factor from 2^61 to 2^62