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

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MnStatusDetails
2543797Factored
FactorDigitsBitsDate
4799126899575262397272168.72021-04-11 01:34:41
ECM
DigitsB1Curves
2550000113 / 280
Estimated T-Level: 22.0
TF below 2^68 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Thomas Honold5DF2B0AC762CD4A90
Verified (Factored)1999-06-15Tony Larsson5DF2B0AC762CD4A92072386
Verified (Factored)2018-06-10kkmrkkblmbrbk5DF2B0AC762CD4A9492533
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-04-12Luigi Morelli75E0AF744CFAB4B01166347353
History
DateUserTypeResult
2021-04-12Ben DeloCERT
PRP Certification
Proof certified good
2021-04-12Luigi MorelliC-PRP
M2543797/479912689957526239727 : 75E0AF744CFAB4B0
PRP proof power = 7
PRP: Verified
Proof certified good
2021-04-11mnd9F-ECM
Factor: 479912689957526239727 / (ECM curve 4, B1=50000, B2=5000000, Sigma=4919440889838926)
2019-04-01TJAOINF
no factor from 2^67 to 2^68
2018-09-22mikrNF-PM1
B1=3000000, B2=135000000, E=12
2018-08-13JossNF-PM1
B1=600000, B2=6000000, E=6
2018-06-10kkmrkkblmbrbkC-LL
5DF2B0AC762CD4A9
2017-08-08Gordon SpenceNF
no factor from 2^66 to 2^67
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
2013-11-09lycornNF
no factor from 2^62 to 2^63
2012-06-15Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-03-04James HeinrichNF-PM1
B1=300000, B2=8000000, E=12
2011-01-08JossNF-PM1
B1=50000
2011-01-03JossNF-PM1
B1=30000
2010-12-19JossNF-PM1
B1=20000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61