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

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MnStatusDetails
337873Factored
FactorDigitsBitsDate
432127906240601444613705382392995.12019-03-24 21:42:43
ECM
DigitsB1Curves
2550000280 / 280
30250000465 / 640
Estimated T-Level: 28.6 ⓘ
TF below 2^90 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski36630
Verified (Factored)Unknown76630
Verified (Factored)Guillermo Ballester Valor4FE73651542976630
Verified (Factored)Eivind Triel4FE7365154297663287980
Verified (Factored)2002-01-15Dennis Pope4FE736515429766354564
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-03-25ANONYMOUSD84D8E1BEAD4FF58132959553
Verified2019-03-26Justine V.D84D8E1BEAD4FF58121360353
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2021-06-24George WoltmanNF-PP1
Start=2/7, B1=30000000, B2=3060000000
2019-03-26Justine V.C-PRP
M337873/43212790624060144461370538239 : D84D8E1BEAD4FF58
PRP: Verified
PRP without proof (small exponent)
2019-03-25ANONYMOUSC-PRP
M337873/43212790624060144461370538239 : D84D8E1BEAD4FF58
PRP: Verified
PRP without proof (small exponent)
2019-03-24alexF-ECM
Factor: 43212790624060144461370538239 / (ECM curve 165, B1=250000, B2=25000000, Sigma=3198448009647875)
2018-01-27Gordon SpenceNF
no factor from 2^64 to 2^65
2016-08-11mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2015-12-12Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-12Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-25NRNF
no factor from 2^61 to 2^62
2013-05-12Sid & AndyNF
no factor from 2^60 to 2^61
2012-01-31alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2011-08-09JossNF-PM1
B1=1356588
2009-01-25Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-30Sturle SundeNF
no factor from 2^58 to 2^59