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

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MnStatusDetails
2307959Factored
FactorDigitsBitsDate
1040176497313742115955992476.52017-10-18 07:21:19
ECM
DigitsB1Curves
255000037 / 280
Estimated T-Level: 20.7
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Philipp HänggiCF4EF1D4028842100
Verified (Factored)1999-03-15John MauriceCF4EF1D4028842101750565
Verified (Factored)2004-04-29S191200CF4EF1D4028842100
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-18Oliver Kruse8A0CD3A57A281A2D190700053
Verified2017-11-23Chang Chia-Tche8A0CD3A57A281A2D1188315853
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2024-03-28debrouxlfactor ECM small0.00 % 2024-03-28
History
DateUserTypeResult
2021-04-08ViliamFNF-PM1
B1=5000000, B2=315000000
2018-02-21alpertronNF-PM1
B1=500000, B2=15000000, E=12
2017-11-23Chang Chia-TcheC-PRP
M2307959/104017649731374211595599 : 8A0CD3A57A281A2D
PRP: Verified
PRP without proof (not generated)
2017-10-18Oliver KruseC-PRP
M2307959/104017649731374211595599 : 8A0CD3A57A281A2D
PRP: Verified
PRP without proof (not generated)
2017-10-18Sid & AndyF-ECM
Factor: 104017649731374211595599 / (ECM curve 7, B1=50000, B2=5000000)
2017-05-30Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-22ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-13Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-02-16BudNF-PM1
B1=500000, B2=10000000, E=12
2009-01-14Sturle SundeNF
no factor from 2^60 to 2^61