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

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MnStatusDetails
2562803Factored
FactorDigitsBitsDate
8935516096352369976980632479.62021-08-27 17:55:51
ECM
DigitsB1Curves
2550000131 / 280
Estimated T-Level: 22.3 ⓘ
TF below 2^69 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Frank HornungA662CC5E3EA212810
Verified (Factored)1999-06-15Julien BeasleyA662CC5E3EA21281247818
Verified (Factored)2018-06-14kkmrkkblmbrbkA662CC5E3EA212811287680
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-08-28SRJ2877B48379635716E2C71102232953
History
DateUserTypeResult
2021-08-28George WoltmanCERT
PRP Certification
Proof certified good
2021-08-28SRJ2877C-PRP
M2562803/893551609635236997698063 : B48379635716E2C7
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-27daveward2005F-ECM
Factor: 893551609635236997698063 / (ECM curve 4, B1=50000, B2=5000000, Sigma=2565449869675775)
2021-07-12TJAOINF
no factor from 2^68 to 2^69
2019-06-17TJAOINF
no factor from 2^67 to 2^68
2018-06-14kkmrkkblmbrbkC-LL
A662CC5E3EA21281
2017-08-13Gordon SpenceNF
no factor from 2^66 to 2^67
2016-05-07mikrNF-PM1
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
2011-04-13James 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