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

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MnStatusDetails
3043603Factored
FactorDigitsBitsDate
1877158302314903996227230972787.32020-11-12 05:12:45
ECM
DigitsB1Curves
255000028 / 280
Estimated T-Level: 20.5
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Allan Schrum1BDEAC6863162BA30
Verified (Factored)1999-07-27Shane Finn1BDEAC6863162BA31310033
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-11-15volkiC03F8889F9A26E1F1254129053
P-1 factors
DateFactorB1B2
2021-02-01187715830231490399622723097325612481855991136
History
DateUserTypeResult
2022-09-03JossNF-PM1
B1=1206540, B2=223284600
2022-01-06JossNF-PM1
B1=1206540, B2=116447100
2021-02-01oodairaF-PM1
Factor: 187715830231490399622723097 / (P-1, B1=32561248, B2=1855991136, E=12)
2021-01-14JossNF-PM1
B1=304360, B2=3043603, E=6
2021-01-14JossNF-PM1
B1=304360
2020-11-15Ben DeloCERT
PRP Certification
Proof certified good
2020-11-15volkiC-PRP
M3043603/187715830231490399622723097 : C03F8889F9A26E1F
PRP proof power = 7
PRP: Verified
Proof certified good
2020-11-12rextheruntF-ECM
Factor: 187715830231490399622723097 / (ECM curve 6, B1=50000, B2=5000000)
2018-07-22ramgeisNF
no factor from 2^67 to 2^68
2017-08-24mikrNF-PM1
B1=3000000, B2=100000000, E=12
2017-05-04Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-09Squeeky_SquirrelNF-PM1
B1=205000, B2=5688750, E=12
2015-06-03ThaNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2010-11-03Sid & AndyNF
no factor from 2^61 to 2^62
2010-10-06markrNF-PM1
B1=110000, B2=2420000, E=6
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61