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

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Exponent Range:










MnStatusDetails
1148857Factored
FactorDigitsBitsDate
643706647824220380627612375.82018-06-15 13:10:07
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 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)Rich Harms09341F8E485AEF2B0
Verified (Factored)Simon Burge09341F8E485AEF2B0
Verified (Factored)2004-07-13Brian J. Beesley09341F8E485AEF2B971475
Verified (Factored)2016-06-01MadPoo09341F8E485AEF2B183431
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-06-18_p95holder_3D6F2204A1D43850160805353
Verified2018-06-18ATH3D6F2204A1D43850136765453
History
DateUserTypeResult
2018-06-18ATHC-PRP
M1148857/64370664782422038062761 : 3D6F2204A1D43850
PRP: Verified
PRP without proof (not generated)
2018-06-18_p95holder_C-PRP
M1148857/64370664782422038062761 : 3D6F2204A1D43850
PRP: Verified
PRP without proof (not generated)
2018-06-15TJAOIF-ECM
Factor: 64370664782422038062761 / (ECM curve 107, B1=50000, B2=5000000)
2018-04-13JossNF-PM1
B1=1148857, B2=114885700, E=12
2017-02-27Smok_bmv NF
no factor from 2^66 to 2^67
2016-07-27Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-07-25Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-06-01MadPooC-LL
09341F8E485AEF2B
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-07-27omylistNF
no factor from 2^65 to 2^66
2015-01-11lycornNF
no factor from 2^64 to 2^65
2014-12-28Matthias WurtingerNF
no factor from 2^63 to 2^64
2013-10-07David CampeauNF-PM1
B1=1220000, B2=35380000, E=12
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2012-08-30AxelssonNF
no factor from 2^61 to 2^62
2009-02-15Sturle SundeNF
no factor from 2^60 to 2^61