Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2356451Factored
FactorDigitsBitsDate
7738753803334611296707432479.42020-07-23 00:05:45
ECM
DigitsB1Curves
255000074 / 280
Estimated T-Level: 21.3
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Charles Rezk17C245EC01F711F80
Verified (Factored)Doug Fortune17C245EC01F711F80
Verified (Factored)1999-04-13Phillip Twiss17C245EC01F711F82320379
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-07-23pew2E180636CAF003E81199970753
Verified2020-07-24marssystems2E180636CAF003E81133230353
History
DateUserTypeResult
2020-07-24marssystemsC-PRP
M2356451/773875380333461129670743 : 2E180636CAF003E8
PRP: Verified
PRP without proof (not generated)
2020-07-23pewC-PRP
M2356451/773875380333461129670743 : 2E180636CAF003E8
PRP: Verified
PRP without proof (not generated)
2020-07-23GANF-ECM
Factor: 773875380333461129670743 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7416869409553016)
2019-04-29TJAOINF
no factor from 2^67 to 2^68
2017-06-13Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-10-28ramgeisNF
no factor from 2^65 to 2^66
2015-08-07mikrNF-PM1
B1=3000000, B2=100000000, E=12
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-22JossNF-PM1
B1=144476
2014-08-07JossNF-PM1
B1=117238
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-05-29Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-23Oscar ÖstlinNF-PM1
B1=90000, B2=1822500, E=6
2010-12-06Oscar ÖstlinNF-PM1
B1=75011
2010-11-04JossNF-PM1
B1=20000
2009-01-16Sturle SundeNF
no factor from 2^60 to 2^61