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

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MnStatusDetails
1867211Factored
FactorDigitsBitsDate
11436465607034585850026892579.92015-11-15 19:12:07
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)John Borleis III46EEB585A6ECEC5A0
Verified (Factored)1998-12-13Jean-Michel Merliot46EEB585A6ECEC5A1822667
Verified (Factored)2015-06-29MadPoo46EEB585A6ECEC5A1286643
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertronFC2175315957DB121013
Verified2017-10-19Oliver KruseFC2175315957DB121115329413
History
DateUserTypeResult
2017-10-19Oliver KruseC-PRP
M1867211/1143646560703458585002689 : FC2175315957DB12
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1867211/1143646560703458585002689 : FC2175315957DB12
PRP: Verified
PRP without proof (not generated)
2015-11-15Chang Chia-TcheF-ECM
Factor: 1143646560703458585002689 / (ECM curve 1, B1=50000, B2=5000000)
2015-10-07Bruno VictalNF-PM1
B1=500000, B2=15000000, E=12
2015-09-10ramgeisNF
no factor from 2^65 to 2^66
2015-06-29MadPooC-LL
46EEB585A6ECEC5A
2015-05-07snme2pm1NF
no factor from 2^64 to 2^65
2015-05-07snme2pm1NF
no factor from 2^63 to 2^64
2012-01-08markrNF-PM1
B1=275000, B2=6000000, E=12
2011-03-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-07Architects CubedNF
no factor from 2^60 to 2^61