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

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MnStatusDetails
2873033Factored
FactorDigitsBitsDate
1476393383052015270732167.02015-07-15 15:50:14
ECM
DigitsB1Curves
255000010 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1997-12-30John R PierceE838BA80842B98430
Verified (Factored)1999-05-09Peter ZinnE838BA80842B9843509410
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-23Oliver Kruse20F502E98CD4DF721246232853
Verified2017-12-08kkmrkkblmbrbk20F502E98CD4DF72172287653
History
DateUserTypeResult
2023-02-27USAFSSNF-PM1
B1=280000, B2=212023350
2017-12-08kkmrkkblmbrbkC-PRP
M2873033/147639338305201527073 : 20F502E98CD4DF72
PRP: Verified
PRP without proof (not generated)
2017-10-23Oliver KruseC-PRP
M2873033/147639338305201527073 : 20F502E98CD4DF72
PRP: Verified
PRP without proof (not generated)
2015-07-15KAMCOBILLF-ECM
Factor: 147639338305201527073
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-10dbaughNF
no factor from 2^62 to 2^63
2012-01-28Grant McCrackenNF
no factor from 2^61 to 2^62
2011-02-06markrNF-PM1
B1=115000, B2=2530000, E=6
2011-01-22JossNF-PM1
B1=50000
2011-01-03JossNF-PM1
B1=30000
2010-12-23JossNF-PM1
B1=20000
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=161250
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61