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

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MnStatusDetails
2055337Factored
FactorDigitsBitsDate
1542268594282109571433612477.02020-07-19 04:04:55
ECM
DigitsB1Curves
2550000117 / 280
Estimated T-Level: 22.1
TF below 2^68 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Joel Armengaud2DD57649113EA2C90
Verified (Factored)Stephen Wood2DD57649113EA2C90
Verified (Factored)1999-03-01Paul Banks2DD57649113EA2C91690322
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-07-19argusdusty66501F118539B2891124552053
Verified2020-07-20marssystems66501F118539B289196361753
History
DateUserTypeResult
2020-07-20marssystemsC-PRP
M2055337/154226859428210957143361 : 66501F118539B289
PRP: Verified
PRP without proof (not generated)
2020-07-19argusdustyC-PRP
M2055337/154226859428210957143361 : 66501F118539B289
PRP: Verified
PRP without proof (not generated)
2020-07-19daveward2005F-ECM
Factor: 154226859428210957143361 / (ECM curve 3, B1=50000, B2=5000000)
2019-03-24chuenkitNF
no factor from 2^67 to 2^68
2017-03-11mikrNF-PM1
B1=3600000, B2=180000000, E=12
2017-02-01mikrNF-PM1
B1=2500000, B2=125000000, E=12
2016-11-06JossNF-PM1
B1=324000
2016-09-22JossNF-PM1
B1=270000, B2=5832000, E=6
2016-08-18Gordon SpenceNF
no factor from 2^66 to 2^67
2016-05-15JossNF-PM1
B1=270000, B2=4860000, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-11-03ramgeisNF
no factor from 2^65 to 2^66
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-26JossNF-PM1
B1=166228
2013-09-01ramgeisNF
no factor from 2^62 to 2^63
2012-03-11Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-21James HeinrichNF-PM1
B1=135000, B2=2902500, E=6
2011-01-06JossNF-PM1
B1=50000
2010-12-26JossNF-PM1
B1=30000
2009-06-21USAFSSNF-PM1
B1=20000, B2=260000
2009-01-02Sturle SundeNF
no factor from 2^60 to 2^61