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
1745581Factored
FactorDigitsBitsDate
176158883204306932072673459532993.82018-07-20 13:05:46
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)Ed KnaptonA00D899891FD00DD0
Verified (Factored)1998-11-28Matthew GauthierA00D899891FD00DD860938
Verified (Factored)2015-07-18MadPooA00D899891FD00DD208070
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-20francijezek56F6A68B36B6F89E193608253
Verified2018-07-23_p95holder_56F6A68B36B6F89E1156609453
P-1 factors
DateFactorB1B2
2018-07-20176158883204306932072673459531745581174558100
History
DateUserTypeResult
2018-07-23_p95holder_C-PRP
M1745581/17615888320430693207267345953 : 56F6A68B36B6F89E
PRP: Verified
PRP without proof (not generated)
2018-07-20francijezekC-PRP
M1745581/17615888320430693207267345953 : 56F6A68B36B6F89E
PRP: Verified
PRP without proof (not generated)
2018-07-20JossF-PM1
Factor: 17615888320430693207267345953 / (P-1, B1=1745581, B2=174558100, E=12)
2017-11-03TJAOINF
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 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-04ramgeisNF
no factor from 2^65 to 2^66
2015-07-18MadPooC-LL
A00D899891FD00DD
2015-05-12snme2pm1NF
no factor from 2^64 to 2^65
2015-05-12snme2pm1NF
no factor from 2^63 to 2^64
2015-04-19mikrNF-PM1
B1=2475400, B2=86660000, E=12
2014-09-15-Anonymous-NF-PM1
B1=173540
2014-05-06JossNF-PM1
B1=136770
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