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

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MnStatusDetails
2084569Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
19628354910355982485899792611570406360139127.22020-01-23 23:47:12
ECM
DigitsB1Curves
2550000280 / 280
30250000166 / 640
Estimated T-Level: 26.3 ⓘ
TF below 2^82 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Phil NesserC1D309A2F3F1E37B0
Verified (Factored)Paul ShadidC1D309A2F3F1E37B0
Verified (Factored)1999-04-13Lawrence Cairns-SmithC1D309A2F3F1E37B1601148
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-01-26Luigi Morelli64EACAB0F7B4D3B11173351253
Verified2020-02-01oodaira64EACAB0F7B4D3B1198256353
History
DateUserTypeResult
2020-02-01oodairaC-PRP
M2084569/196283549103559824858997926115704063601 : 64EACAB0F7B4D3B1
PRP: Verified
PRP without proof (not generated)
2020-01-26Luigi MorelliC-PRP
M2084569/196283549103559824858997926115704063601 : 64EACAB0F7B4D3B1
PRP: Verified
PRP without proof (not generated)
2020-01-23David_McCannF-ECM
Factor: 196283549103559824858997926115704063601 / (ECM curve 1, B1=50000, B2=5000000, Sigma=5716461300195597)
2019-09-20mikrNF-PM1
B1=4000000, B2=200000000, E=12
2019-04-01chuenkitNF
no factor from 2^67 to 2^68
2016-09-18Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-11-06ramgeisNF
no factor from 2^65 to 2^66
2015-03-31VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-31VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-21Matthias WurtingerNF-PM1
B1=1000000, B2=100000000, E=12
2014-08-21JossNF-PM1
B1=130790
2013-02-21dbaughNF
no factor from 2^62 to 2^63
2012-03-18Sebastian HornbostelNF
no factor from 2^61 to 2^62
2009-01-03Sturle SundeNF
no factor from 2^60 to 2^61