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

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MnStatusDetails
2563633Factored
FactorDigitsBitsDate
1069734036880039830451323031627332103.12016-05-11 02:14:22
ECM
DigitsB1Curves
255000018 / 280
Estimated T-Level: 20.3
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-02-08Adams DouglasACB805814CD956930
Verified (Factored)1998-03-17Mark GorbicsACB805814CD956930
Verified (Factored)1999-04-13James GriffinACB805814CD956932447043
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-15Oliver KruseE8F79612DBF1F47C1113520453
Verified2017-12-01storm5510E8F79612DBF1F47C1234001353
P-1 factors
DateFactorB1B2
2016-05-11106973403688003983045132303162733200000112000000
History
DateUserTypeResult
2017-12-01storm5510C-PRP
M2563633/10697340368800398304513230316273 : E8F79612DBF1F47C
PRP: Verified
PRP without proof (not generated)
2017-10-15Oliver KruseC-PRP
M2563633/10697340368800398304513230316273 : E8F79612DBF1F47C
PRP: Verified
PRP without proof (not generated)
2016-05-11mikrF-PM1
Factor: 10697340368800398304513230316273 / (P-1, B1=3200000, B2=112000000, E=12)
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-08ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-06-17Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-14James HeinrichNF-PM1
B1=175000, B2=4112500, E=6
2011-01-10JossNF-PM1
B1=50000
2011-01-03JossNF-PM1
B1=30000
2010-12-21JossNF-PM1
B1=20000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61