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
2106631Factored
FactorDigitsBitsDate
417587465104373809763512375.12015-08-02 14:33:07
ECM
DigitsB1Curves
2550000102 / 280
Estimated T-Level: 21.8
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Duncan Booth6F036EAA8CE378A00
Bad1999-04-23Steve GisselbergD578182538E60E4F494040
Verified (Factored)1999-04-23Ralf P. Kofaldt6F036EAA8CE378A01170434
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-07Oliver Kruse8552B9B54E70A0BD1013
Verified2017-11-17kkmrkkblmbrbk8552B9B54E70A0BD134797013
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2017-11-17kkmrkkblmbrbkC-PRP
M2106631/41758746510437380976351 : 8552B9B54E70A0BD
PRP: Verified
PRP without proof (not generated)
2017-10-07Oliver KruseC-PRP
M2106631/41758746510437380976351 : 8552B9B54E70A0BD
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-08-02guruF-ECM
Factor: 41758746510437380976351 / (ECM curve 2, B1=50000, B2=5000000)
2015-03-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-15VictordeHollanderNF
no factor from 2^63 to 2^64
2013-09-04ramgeisNF
no factor from 2^62 to 2^63
2012-03-29Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-24James HeinrichNF-PM1
B1=140000, B2=3010000, E=6
2011-01-10JossNF-PM1
B1=50000
2010-12-29JossNF-PM1
B1=30000
2009-08-02USAFSSNF-PM1
B1=20000, B2=260000
2009-01-02Sturle SundeNF
no factor from 2^60 to 2^61