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

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MnStatusDetails
1738207Factored
FactorDigitsBitsDate
43590115427829611077786632581.92019-11-22 05:25:38
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
Verified (Factored)Göran KällqvistDF373D03682F4ED10
Verified (Factored)2003-01-25Edo de Roo JankovicDF373D03682F4ED1994857
Verified (Factored)2015-07-18MadPooDF373D03682F4ED198584
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-11-23mnd9ADB66DC627179BBC18496753
Verified2019-11-26Chang Chia-TcheADB66DC627179BBC161835353
History
DateUserTypeResult
2019-11-26Chang Chia-TcheC-PRP
M1738207/4359011542782961107778663 : ADB66DC627179BBC
PRP: Verified
PRP without proof (not generated)
2019-11-23mnd9C-PRP
M1738207/4359011542782961107778663 : ADB66DC627179BBC
PRP: Verified
PRP without proof (not generated)
2019-11-22KeysarecoolF-ECM
Factor: 4359011542782961107778663 / (ECM curve 3, B1=50000, B2=5000000, Sigma=871475012272837)
2019-06-17TJAOINF
no factor from 2^67 to 2^68
2018-10-17JossNF-PM1
B1=1738207, B2=191202770, E=12
2018-08-09JossNF-PM1
B1=1738207, B2=173820700, E=12
2018-03-12TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-09-04ramgeisNF
no factor from 2^65 to 2^66
2015-07-18MadPooC-LL
DF373D03682F4ED1
2015-05-06snme2pm1NF
no factor from 2^64 to 2^65
2015-05-06snme2pm1NF
no factor from 2^63 to 2^64
2015-04-09mikrNF-PM1
B1=2475400, B2=86660000, E=12
2014-12-02JossNF-PM1
B1=210778
2014-09-11JossNF-PM1
B1=173852
2014-05-06JossNF-PM1
B1=136926
2014-04-05JossNF-PM1
B1=100000
2011-02-08Carsten KossendeyNF-PM1
B1=95000, B2=1543750, E=6
2010-11-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-24Architects CubedNF
no factor from 2^60 to 2^61