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

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MnStatusDetails
3639409Factored
FactorDigitsBitsDate
12801581139379104364972270.12021-08-20 14:56:26
ECM
DigitsB1Curves
255000027 / 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)John Durbetaki550B85BE7FEF68760
Verified (Factored)1999-10-07Dave Hollinger550B85BE7FEF68762504093
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-08-22/r/counting1D3CBED0AE2C81F2163697753
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-04JossNF-PM1
B1=90000
2021-08-23Massimo Cappelli (ik5pwa)CERT
PRP Certification
Proof certified good
2021-08-22/r/countingC-PRP
M3639409/1280158113937910436497 : 1D3CBED0AE2C81F2
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-20daveward2005F-ECM
Factor: 1280158113937910436497 / (ECM curve 5, B1=50000, B2=5000000, Sigma=916898731666499)
2020-11-06axnNF
no factor from 2^68 to 2^69
2020-08-19axnNF-PM1
B1=30000000, B2=1000000000, E=12
2020-07-25axnNF-PM1
B1=30000000, B2=600000000, E=12
2018-08-06TJAOINF
no factor from 2^67 to 2^68
2017-03-02JossNF-PM1
B1=241228, B2=2412280, E=6
2017-02-04JossNF-PM1
B1=201024
2017-01-29JossNF-PM1
B1=167520
2016-12-27JossNF-PM1
B1=129600
2016-12-25Gordon SpenceNF
no factor from 2^66 to 2^67
2016-06-08JossNF-PM1
B1=108000, B2=3240000, E=6
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-18ramgeisNF
no factor from 2^65 to 2^66
2015-01-22VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-22VictordeHollanderNF
no factor from 2^63 to 2^64
2012-06-20GrunwalderGIMPNF
no factor from 2^1 to 2^63
2012-01-24Squeeky_SquirrelNF-PM1
B1=90000, B2=1620000, E=6
2011-05-17markrNF
no factor from 2^61 to 2^62
2009-07-06Carsten KossendeyNF-PM1
B1=20000, B2=245000
2009-03-10S485122NF
no factor from 2^60 to 2^61