Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
1707257Factored
FactorDigitsBitsDate
26362021462018935050572271.22020-03-06 03:15:20
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
BadPaul Renault862277D88EBDD0660
Verified (Factored)1998-12-13Christopher Wiley9103DF32252B52C6475843
Verified (Factored)1999-05-09Paul Phillips9103DF32252B52C61536054
Verified (Factored)2015-07-19MadPoo9103DF32252B52C61653179
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-03-07mnd9881A8DDF144AEA14148141953
Verified2020-03-08Alvin Bunk881A8DDF144AEA14129408753
History
DateUserTypeResult
2020-03-08Alvin BunkC-PRP
M1707257/2636202146201893505057 : 881A8DDF144AEA14
PRP: Verified
PRP without proof (not generated)
2020-03-07mnd9C-PRP
M1707257/2636202146201893505057 : 881A8DDF144AEA14
PRP: Verified
PRP without proof (not generated)
2020-03-06KeysarecoolF-ECM
Factor: 2636202146201893505057 / (ECM curve 3, B1=50000, B2=5000000, Sigma=1156756489253889)
2019-07-17TJAOINF
no factor from 2^67 to 2^68
2018-06-11TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-08-31ramgeisNF
no factor from 2^65 to 2^66
2015-07-19MadPooC-LL
9103DF32252B52C6
2015-02-18VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-02-13JossNF-PM1
B1=374532
2015-02-13VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-13VictordeHollanderNF
no factor from 2^63 to 2^64
2015-01-07JossNF-PM1
B1=281392
2014-10-05JossNF-PM1
B1=187595
2014-04-28-Anonymous-NF-PM1
B1=150000
2014-03-31JossNF-PM1
B1=100000
2011-02-07Carsten KossendeyNF-PM1
B1=90000, B2=1507500, E=6
2011-01-29JossNF-PM1
B1=50000
2010-10-16GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-22Architects CubedNF
no factor from 2^60 to 2^61