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

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MnStatusDetails
2998363Factored
FactorDigitsBitsDate
6278200586003954533672169.12020-09-16 01:15:16
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)Roger Smith519298795715D6950
Verified (Factored)1999-05-09David Phillips519298795715D6951691009
Verified (Factored)2018-10-24kkmrkkblmbrbk519298795715D695849353
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-09-16Klaus Nordmann598314B99A38E5A919528653
History
DateUserTypeResult
2020-09-16Ben DeloCERT
PRP Certification
Proof certified good
2020-09-16Klaus NordmannC-PRP
M2998363/627820058600395453367 : 598314B99A38E5A9
PRP proof power = 7
PRP: Verified
Proof certified good
2020-09-16daveward2005F-ECM
Factor: 627820058600395453367 / (ECM curve 3, B1=50000, B2=5000000)
2019-11-30BigBrotherNF-PM1
B1=3000000, B2=90000000, E=12
2018-12-30chuenkitNF
no factor from 2^67 to 2^68
2018-10-24kkmrkkblmbrbkC-LL
519298795715D695
2017-12-07Gordon SpenceNF
no factor from 2^66 to 2^67
2017-04-12JossNF-PM1
B1=644971, B2=6449710, E=12
2017-04-07JossNF-PM1
B1=537476, B2=5374760, E=6
2017-04-04JossNF-PM1
B1=447897, B2=4478970, E=6
2017-04-01JossNF-PM1
B1=373248, B2=3732480, E=6
2017-03-02JossNF-PM1
B1=311040, B2=3110400, E=6
2016-12-23JossNF-PM1
B1=216000
2016-12-16JossNF-PM1
B1=180000
2016-10-07JossNF-PM1
B1=150000, B2=15000000, E=12
2016-09-21JossNF-PM1
B1=150000, B2=2894925
2016-09-12JossNF-PM1
B1=150000, B2=2631750, E=6
2016-02-24ramgeisNF
no factor from 2^65 to 2^66
2015-02-01lycornNF
no factor from 2^64 to 2^65
2015-02-01lycornNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-11-26Grant McCrackenNF
no factor from 2^61 to 2^62
2010-10-19markrNF-PM1
B1=110000, B2=2392500, E=6
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61