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

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MnStatusDetails
2433763Factored
FactorDigitsBitsDate
1689310815706620039297532477.22020-11-19 18:29:00
ECM
DigitsB1Curves
255000098 / 280
Estimated T-Level: 21.8 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-03-03Herb Savage2D7942021A57B0DB0
Verified (Factored)2000-01-19Ken Davis2D7942021A57B0DB825592
Verified (Factored)2018-05-22kkmrkkblmbrbk2D7942021A57B0DB679295
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-11-19mrh2E28F5E76A889AF3113861053
Verified2020-11-19ATH2E28F5E76A889AF3195651453
History
DateUserTypeResult
2020-11-19ATHC-PRP
M2433763/168931081570662003929753 : 2E28F5E76A889AF3
PRP: Verified
PRP without proof (not generated)
2020-11-19mrhC-PRP
M2433763/168931081570662003929753 : 2E28F5E76A889AF3
PRP: Verified
PRP without proof (not generated)
2020-11-19mnd9F-ECM
Factor: 168931081570662003929753 / (ECM curve 5, B1=50000, B2=5000000, Sigma=983606867838668)
2019-06-24TJAOINF
no factor from 2^67 to 2^68
2018-05-22kkmrkkblmbrbkC-LL
2D7942021A57B0DB
2017-07-08Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-25ramgeisNF
no factor from 2^65 to 2^66
2015-02-27VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-27VictordeHollanderNF
no factor from 2^63 to 2^64
2014-05-01mikrNF-PM1
B1=1986400, B2=69524000, E=12
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-05Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-24Oscar ÖstlinNF-PM1
B1=95000, B2=1923750, E=6
2011-01-09Oscar ÖstlinNF-PM1
B1=75011
2010-11-17JossNF-PM1
B1=20000
2009-01-17Sturle SundeNF
no factor from 2^60 to 2^61