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

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MnStatusDetails
2596943Factored
FactorDigitsBitsDate
5343143061326362844535432478.82015-10-03 05:52:23
ECM
DigitsB1Curves
255000014 / 280
Estimated T-Level: 20.3
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-02-12Robert R. FenichelEFE75F4A19F2D3D40
Verified (Factored)1999-04-23William GalwayEFE75F4A19F2D3D4688003
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron28CD03DA9D42FB1F1013
Verified2017-11-12Oliver Kruse28CD03DA9D42FB1F111376513
History
DateUserTypeResult
2023-01-28USAFSSNF-PM1
B1=360000, B2=322217280
2022-03-11LordJuliusNF
no factor from 2^1 to 2^60
2017-11-12Oliver KruseC-PRP
M2596943/534314306132636284453543 : 28CD03DA9D42FB1F
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2596943/534314306132636284453543 : 28CD03DA9D42FB1F
PRP: Verified
PRP without proof (not generated)
2015-10-03lopperF-ECM
Factor: 534314306132636284453543 / (ECM curve 2, B1=50000, B2=5000000)
2015-02-27VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-27VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-23Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-18James HeinrichNF-PM1
B1=175000, B2=4156250, E=6
2011-01-15JossNF-PM1
B1=50000
2010-11-16JossNF-PM1
B1=20000
2009-01-29Sturle SundeNF
no factor from 2^60 to 2^61