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

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Exponent Range:










MnStatusDetails
770839Factored
FactorDigitsBitsDate
40091845309134270916645860072891.72019-02-20 04:00:44
ECM
DigitsB1Curves
2550000280 / 280
30250000102 / 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)David Slowinski1A430
Verified (Factored)Vincent Renardias9237609CCC075A430
Verified (Factored)2002-10-26Mark Outhier9237609CCC075A43745561
Verified (Factored)2015-04-11MadPoo9237609CCC075A43508750
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-02-20artorollo8A5B1E88DD5C997F148907253
Verified2019-02-22arnaud8A5B1E88DD5C997F126236753
History
DateUserTypeResult
2019-02-22arnaudC-PRP
M770839/4009184530913427091664586007 : 8A5B1E88DD5C997F
PRP: Verified
PRP without proof (small exponent)
2019-02-20artorolloC-PRP
M770839/4009184530913427091664586007 : 8A5B1E88DD5C997F
PRP: Verified
PRP without proof (small exponent)
2019-02-20OS1F-ECM
Factor: 4009184530913427091664586007
2018-03-02Smok_bmv NF
no factor from 2^65 to 2^66
2016-03-19lycornNF
no factor from 2^64 to 2^65
2015-11-20Sid & AndyNF-PM1
B1=7708390, B2=231251700, E=12
2015-10-22Gordon SpenceNF
no factor from 2^63 to 2^64
2015-10-22Gordon SpenceNF
no factor from 2^62 to 2^63
2015-04-11MadPooC-LL
9237609CCC075A43
2015-03-06NRNF
no factor from 2^61 to 2^62
2013-10-26David CampeauNF-PM1
B1=1685000, B2=57290000, E=12
2012-07-21JossNF-PM1
B1=1541678
2011-12-10JossNF-PM1
B1=931156
2011-08-24JossNF-PM1
B1=465578
2011-07-10JossNF-PM1
B1=279347
2010-06-15Architects CubedNF
no factor from 2^60 to 2^61
2008-10-11Sturle SundeNF
no factor from 2^59 to 2^60
2008-10-11Sturle SundeNF
no factor from 2^58 to 2^59