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

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MnStatusDetails
2532853Factored
FactorDigitsBitsDate
1973225924648772142072167.42015-08-04 01:54:40
ECM
DigitsB1Curves
255000014 / 280
Estimated T-Level: 20.3
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Didier Couderc0C22C09BC51009B60
Verified (Factored)Cornelius Caesar0C22C09BC51009B60
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-15kkmrkkblmbrbk28EA5978B61EDD88149778653
Verified2017-11-08Oliver Kruse28EA5978B61EDD881199738653
History
DateUserTypeResult
2022-03-11LordJuliusNF
no factor from 2^1 to 2^60
2021-09-27Dylan DelgadoNF-PM1
B1=3000000, B2=273000000
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-08Oliver KruseC-PRP
M2532853/197322592464877214207 : 28EA5978B61EDD88
PRP: Verified
PRP without proof (not generated)
2017-10-15kkmrkkblmbrbkC-PRP
M2532853/197322592464877214207 : 28EA5978B61EDD88
PRP: Verified
PRP without proof (not generated)
2015-08-04guruF-ECM
Factor: 197322592464877214207 / (ECM curve 2, B1=50000, B2=5000000)
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-14Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-03-23James HeinrichNF-PM1
B1=300000, B2=8000000, E=12
2011-01-06JossNF-PM1
B1=50000
2011-01-02JossNF-PM1
B1=30000
2010-12-19JossNF-PM1
B1=20000
2009-04-09Rob_DeeNF
no factor from 2^60 to 2^61