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

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MnStatusDetails
2478257Factored
FactorDigitsBitsDate
461003016075638616017681292685.32020-05-24 03:08:28
ECM
DigitsB1Curves
255000041 / 280
Estimated T-Level: 20.7 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John HockingA8D3950EED4584B90
Verified (Factored)1999-05-16Stephen WoodA8D3950EED4584B9463121
Verified (Factored)2018-05-30kkmrkkblmbrbkA8D3950EED4584B92256353
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-05-24M Miller6118CDA70F91480B1135826853
Verified2020-05-26Luigi Morelli6118CDA70F91480B1196083753
History
DateUserTypeResult
2020-05-26Luigi MorelliC-PRP
M2478257/46100301607563861601768129 : 6118CDA70F91480B
PRP: Verified
PRP without proof (not generated)
2020-05-24M MillerC-PRP
M2478257/46100301607563861601768129 : 6118CDA70F91480B
PRP: Verified
PRP without proof (not generated)
2020-05-24mnd9F-ECM
Factor: 46100301607563861601768129 / (ECM curve 2, B1=50000, B2=5000000, Sigma=2059853562236078)
2019-05-27TJAOINF
no factor from 2^67 to 2^68
2018-05-30kkmrkkblmbrbkC-LL
A8D3950EED4584B9
2017-07-22Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-28ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-25mikrNF-PM1
B1=2382500, B2=85770100, E=12
2014-09-02JossNF-PM1
B1=120899
2013-08-21David CampeauNF
no factor from 2^62 to 2^63
2012-06-08Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-21Oscar ÖstlinNF-PM1
B1=95000, B2=1947500, E=6
2010-11-20JossNF-PM1
B1=20000
2009-01-14Sturle SundeNF
no factor from 2^60 to 2^61