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
2909747Factored
FactorDigitsBitsDate
2038610939729410341265992477.42020-08-14 22:00:56
ECM
DigitsB1Curves
255000019 / 280
Estimated T-Level: 20.3
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Allan Schrum4BF3907F017A396D0
Verified (Factored)1999-11-24Stefan Weber4BF3907F017A396D1625575
Verified (Factored)2018-10-02kkmrkkblmbrbk4BF3907F017A396D172114
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-08-15Massimo Cappelli (ik5pwa)F60999168A6047461103390753
Verified2020-08-16kutensF60999168A604746179305853
History
DateUserTypeResult
2020-08-16kutensC-PRP
M2909747/203861093972941034126599 : F60999168A604746
PRP: Verified
PRP without proof (not generated)
2020-08-15Massimo Cappelli (ik5pwa)C-PRP
M2909747/203861093972941034126599 : F60999168A604746
PRP: Verified
PRP without proof (not generated)
2020-08-14GANF-ECM
Factor: 203861093972941034126599 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7722535508839286)
2020-03-27masserNF-PM1
B1=5000000, B2=200000000, E=12
2018-12-17chuenkitNF
no factor from 2^67 to 2^68
2018-10-02kkmrkkblmbrbkC-LL
4BF3907F017A396D
2017-11-19Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-22ramgeisNF
no factor from 2^65 to 2^66
2015-04-25VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-25VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-10dbaughNF
no factor from 2^62 to 2^63
2011-12-16Grant McCrackenNF
no factor from 2^61 to 2^62
2011-01-27markrNF-PM1
B1=105000, B2=2283750, E=6
2010-12-24JossNF-PM1
B1=20000
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=168750
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61