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

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MnStatusDetails
2223773Factored
FactorDigitsBitsDate
64976364432046312627372272.52021-04-08 18:25:21
ECM
DigitsB1Curves
2550000156 / 280
Estimated T-Level: 22.8
TF below 2^71 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Bob Moulton4EFEAD87088036F20
Verified (Factored)1999-03-01Dave Sill4EFEAD87088036F2248935
Verified (Factored)2018-04-19kkmrkkblmbrbk4EFEAD87088036F2370007
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-04-11Sébastien BROUCKEE0AB9A8D2F705B7C1218934953
Verified2021-04-11ThomRuleyE0AB9A8D2F705B7C174672853
History
DateUserTypeResult
2021-04-11ThomRuleyC-PRP
M2223773/6497636443204631262737 : E0AB9A8D2F705B7C
PRP: Verified
PRP without proof (not generated)
2021-04-11Sébastien BROUCKEC-PRP
M2223773/6497636443204631262737 : E0AB9A8D2F705B7C
PRP: Verified
PRP without proof (not generated)
2021-04-08daveward2005F-ECM
Factor: 6497636443204631262737 / (ECM curve 7, B1=50000, B2=5000000, Sigma=7400766979317311)
2019-04-22TJAOINF
no factor from 2^67 to 2^68
2018-04-19kkmrkkblmbrbkC-LL
4EFEAD87088036F2
2016-12-23Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-12-22Alexander DubrovinNF-PM1
B1=2000000, B2=65000000, E=12
2015-11-21Alexander DubrovinNF-PM1
B1=1000000, B2=5000000, E=6
2015-10-25ramgeisNF
no factor from 2^65 to 2^66
2015-05-02Squeeky_SquirrelNF-PM1
B1=160000, B2=4600000, E=6
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-29JossNF-PM1
B1=142726
2014-05-26JossNF-PM1
B1=113863
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-04-19Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-12Oscar ÖstlinNF-PM1
B1=85000, B2=1593750, E=6
2010-10-21Oscar ÖstlinNF-PM1
B1=75011
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61