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
3743797Factored
FactorDigitsBitsDate
2667338056418124902632167.92018-07-23 16:23:30
ECM
DigitsB1Curves
255000012 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)INTERSHOP CommunicationsC712097FFE1DAF6F0
Verified (Factored)1999-12-08Carter SmithhartC712097FFE1DAF6F2618304
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-24_p95holder_E9541C2C4831D53C1244779153
Verified2018-07-25arnaudE9541C2C4831D53C116580953
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-05JossNF-PM1
B1=90000
2018-07-25arnaudC-PRP
M3743797/266733805641812490263 : E9541C2C4831D53C
PRP: Verified
PRP without proof (not generated)
2018-07-24_p95holder_C-PRP
M3743797/266733805641812490263 : E9541C2C4831D53C
PRP: Verified
PRP without proof (not generated)
2018-07-23TJAOIF
Factor: 266733805641812490263 / TF: 67-68
2016-11-05Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-26ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-11-08mikrNF-PM1
B1=1600000, B2=66000000, E=12
2015-01-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-03-05Squeeky_SquirrelNF-PM1
B1=110000, B2=2035000, E=6
2012-05-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-05-08markrNF
no factor to 2^62
2009-07-07Carsten KossendeyNF-PM1
B1=20000, B2=265000
2009-03-05S485122NF
no factor from 2^60 to 2^61