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
2235539Factored
FactorDigitsBitsDate
28415726337383366752257425692891.22016-01-08 20:45:21
ECM
DigitsB1Curves
255000089 / 280
Estimated T-Level: 21.6 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ed Knapton046B2C9C19F633AB0
Verified (Factored)1999-02-14Vern Middleton046B2C9C19F633AB2038961
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertronB5DB822A0ECEAEB71013
Verified2017-10-28Oliver KruseB5DB822A0ECEAEB7188015713
P-1 factors
DateFactorB1B2
2016-01-082841572633738336675225742569200000065000000
History
DateUserTypeResult
2017-10-28Oliver KruseC-PRP
M2235539/2841572633738336675225742569 : B5DB822A0ECEAEB7
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2235539/2841572633738336675225742569 : B5DB822A0ECEAEB7
PRP: Verified
PRP without proof (not generated)
2016-04-18alpertronNF-PM1
B1=500000, B2=15000000, E=12
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-01-08Alexander DubrovinF-PM1
Factor: 2841572633738336675225742569 / (P-1, B1=2000000, B2=65000000, E=12)
2015-11-30Alexander DubrovinNF-PM1
B1=1000000, B2=5000000, E=6
2015-10-25ramgeisNF
no factor from 2^65 to 2^66
2015-03-10VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-10VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-30JossNF-PM1
B1=142422
2014-06-01JossNF-PM1
B1=113711
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-04-21Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-13Oscar ÖstlinNF-PM1
B1=85000, B2=1615000, E=6
2010-10-31Oscar ÖstlinNF-PM1
B1=75011
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61