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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Exponent Range:










MnStatusDetails
2239219Factored
FactorDigitsBitsDate
10798412624869317671832269.92015-12-02 19:19:05
ECM
DigitsB1Curves
255000085 / 280
Estimated T-Level: 21.5
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ken Kriesel4A429CF9364F2F430
Verified (Factored)1999-02-14Sam Robertson4A429CF9364F2F431402484
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertronA71F38D523DF5F431013
Verified2017-10-28Oliver KruseA71F38D523DF5F43158324013
P-1 factors
DateFactorB1B2
2015-12-02107984126248693176718310000006000000
History
DateUserTypeResult
2017-10-28Oliver KruseC-PRP
M2239219/1079841262486931767183 : A71F38D523DF5F43
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2239219/1079841262486931767183 : A71F38D523DF5F43
PRP: Verified
PRP without proof (not generated)
2016-04-23alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-12-02Alexander DubrovinF-PM1
Factor: 1079841262486931767183 / (P-1, B1=1000000, B2=6000000, 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=142328
2014-06-01JossNF-PM1
B1=113664
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-04-27Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-14Oscar ÖstlinNF-PM1
B1=85000, B2=1636250, E=6
2010-11-08Oscar ÖstlinNF-PM1
B1=75011
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61