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

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MnStatusDetails
1749887Factored
FactorDigitsBitsDate
836573436170968954972066.22014-12-23 01:02:02
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Eli Kane2A788FBAF71F9FA90
Verified (Factored)1998-12-21Kent Lee2A788FBAF71F9FA9424735
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-03Oliver Kruse2935353F6BF1BA471013
Verified2017-11-03ATH2935353F6BF1BA47191590413
History
DateUserTypeResult
2017-11-03ATHC-PRP
M1749887/83657343617096895497 : 2935353F6BF1BA47
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1749887/83657343617096895497 : 2935353F6BF1BA47
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-12-23Chang Chia-TcheF-ECM
Factor: 83657343617096895497 / (ECM curve 2, B1=50000, B2=5000000)
2014-09-15-Anonymous-NF-PM1
B1=173358
2014-05-06JossNF-PM1
B1=136679
2014-04-08JossNF-PM1
B1=100000
2011-02-07Carsten KossendeyNF-PM1
B1=95000, B2=1543750, E=6
2010-11-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-24Architects CubedNF
no factor from 2^60 to 2^61