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

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MnStatusDetails
2560457Factored
FactorDigitsBitsDate
1699614419794417231167292477.22020-07-12 20:35:46
ECM
DigitsB1Curves
255000044 / 280
Estimated T-Level: 20.8 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Mike Barnett51C988011F6BB3A50
Verified (Factored)1999-08-31Gerhard H Wrodnigg51C988011F6BB3A51178029
Verified (Factored)2018-06-13kkmrkkblmbrbk51C988011F6BB3A5202287
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-15nordiBF57391000A6C7021132769553
Verified2020-07-15oodairaBF57391000A6C702181601353
History
DateUserTypeResult
2020-07-15oodairaC-PRP
M2560457/169961441979441723116729 : BF57391000A6C702
PRP: Verified
PRP without proof (not generated)
2020-07-15nordiC-PRP
M2560457/169961441979441723116729 : BF57391000A6C702
PRP: Verified
PRP without proof (not generated)
2020-07-12mnd9F-ECM
Factor: 169961441979441723116729 / (ECM curve 2, B1=50000, B2=5000000, Sigma=5360452848643695)
2019-07-01TJAOINF
no factor from 2^67 to 2^68
2018-06-13kkmrkkblmbrbkC-LL
51C988011F6BB3A5
2017-08-11Gordon SpenceNF
no factor from 2^66 to 2^67
2016-04-24mikrNF-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
2012-06-16Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-11James HeinrichNF-PM1
B1=175000, B2=4068750, E=6
2011-01-10JossNF-PM1
B1=50000
2011-01-03JossNF-PM1
B1=30000
2010-12-21JossNF-PM1
B1=20000
2009-02-01Sturle SundeNF
no factor from 2^60 to 2^61