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

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MnStatusDetails
2518619Factored
FactorDigitsBitsDate
9852730618891385988172169.72020-07-18 15:35:24
ECM
DigitsB1Curves
255000052 / 280
Estimated T-Level: 20.9
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Joe Decker1C4DA6FB604B86EB0
Verified (Factored)1998-03-09Denis G. CLAVE1C4DA6FB604B86EB0
Verified (Factored)1999-04-23John Doyle1C4DA6FB604B86EB862583
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-07-21xyuzyzFEDA9FA38E2C60E6157900953
Verified2020-07-22marssystemsFEDA9FA38E2C60E61131905453
History
DateUserTypeResult
2020-07-22marssystemsC-PRP
M2518619/985273061889138598817 : FEDA9FA38E2C60E6
PRP: Verified
PRP without proof (not generated)
2020-07-21xyuzyzC-PRP
M2518619/985273061889138598817 : FEDA9FA38E2C60E6
PRP: Verified
PRP without proof (not generated)
2020-07-18GANF-ECM
Factor: 985273061889138598817 / (ECM curve 2, B1=50000, B2=5000000, Sigma=5404446752707674)
2019-04-29TJAOINF
no factor from 2^67 to 2^68
2018-04-29mikrNF-PM1
B1=3000000, B2=135000000, E=12
2017-11-01JossNF-PM1
B1=600000, B2=6000000, E=6
2017-08-01Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-06ramgeisNF
no factor from 2^65 to 2^66
2015-02-18VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-18VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-13Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-03-04James HeinrichNF-PM1
B1=300000, B2=8000000, E=12
2011-01-06JossNF-PM1
B1=50000
2011-01-01JossNF-PM1
B1=30000
2010-12-19JossNF-PM1
B1=20000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61