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
4991339Factored
FactorDigitsBitsDate
113866353104312450238712373.32017-06-05 18:21:20
ECM
DigitsB1Curves
25500007 / 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)Jordan Dennis9EB63C08D8E07D480
Bad1998-06-20Andrew Siwko943A692A40A0800E0
Verified (Factored)2001-04-15Michel Claes9EB63C08D8E07D481493916
Verified (Factored)2002-01-15Rick Lavoie9EB63C08D8E07D484211254
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28alpertronAAF24C94D6F0BE421013
Verified2018-01-11kkmrkkblmbrbkAAF24C94D6F0BE421313733313
History
DateUserTypeResult
2018-01-11kkmrkkblmbrbkC-PRP
M4991339/11386635310431245023871 : AAF24C94D6F0BE42
PRP: Verified
PRP without proof (not generated)
2017-09-28alpertronC-PRP
M4991339/11386635310431245023871 : AAF24C94D6F0BE42
PRP: Verified
PRP without proof (not generated)
2017-06-05bamF-ECM
Factor: 11386635310431245023871 / (ECM curve 1, B1=50000, B2=5000000)
2017-05-21YxinityNF
no factor from 2^66 to 2^67
2017-02-05Squeeky_SquirrelNF-PM1
B1=300000, B2=9375000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-31snme2pm1NF
no factor from 2^65 to 2^66
2014-11-07lycornNF
no factor from 2^64 to 2^65
2014-11-07lycornNF
no factor from 2^63 to 2^64
2011-12-13Squeeky_SquirrelNF-PM1
B1=120000, B2=2430000, E=6
2011-09-03GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-07-06Squeeky_SquirrelNF-PM1
B1=60000, B2=990000, E=6
2008-09-04Sturle SundeNF
no factor from 2^61 to 2^62