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

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MnStatusDetails
2238703Factored
FactorDigitsBitsDate
14939113026053209792792270.32020-02-17 10:33:15
ECM
DigitsB1Curves
255000097 / 280
Estimated T-Level: 21.7 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)The Vanguard (Nelson Jones & Mohammad Malik & Anthony Joseph & Art Mandelin & Ed59410C5A1E9889A90
Verified (Factored)1999-03-15Jakob Trier59410C5A1E9889A9558551
Verified (Factored)2018-04-21kkmrkkblmbrbk59410C5A1E9889A9610819
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-02-18Christoph ZengerBCCA2847167FB3901199967853
Verified2020-02-18AbsolutXTRBCCA2847167FB3901129445053
History
DateUserTypeResult
2020-02-18AbsolutXTRC-PRP
M2238703/1493911302605320979279 : BCCA2847167FB390
PRP: Verified
PRP without proof (not generated)
2020-02-18Christoph ZengerC-PRP
M2238703/1493911302605320979279 : BCCA2847167FB390
PRP: Verified
PRP without proof (not generated)
2020-02-17KeysarecoolF-ECM
Factor: 1493911302605320979279 / (ECM curve 2, B1=50000, B2=5000000, Sigma=6304353890833771)
2019-04-08TJAOINF
no factor from 2^67 to 2^68
2018-04-21kkmrkkblmbrbkC-LL
59410C5A1E9889A9
2016-12-29Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-01-10Alexander DubrovinNF-PM1
B1=2000000, B2=65000000, E=12
2015-12-02Alexander DubrovinNF-PM1
B1=1000000, B2=6000000, E=6
2015-10-25ramgeisNF
no factor from 2^65 to 2^66
2015-03-10VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-10VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-30JossNF-PM1
B1=142340
2014-06-01JossNF-PM1
B1=113670
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-04-27Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-14Oscar ÖstlinNF-PM1
B1=85000, B2=1636250, E=6
2010-11-08Oscar ÖstlinNF-PM1
B1=75011
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61