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

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Exponent Range:










MnStatusDetails
1355989Factored
FactorDigitsBitsDate
39835328632560535431432271.82009-08-03 13:19:11
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 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)James GantF222978D9F49AD340
Verified (Factored)Cornelius CaesarF222978D9F49AD340
Verified (Factored)Brian J. BeesleyF222978D9F49AD34110715
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30Oliver KruseEB765901EEA7BEE61013
Verified2017-11-04kkmrkkblmbrbkEB765901EEA7BEE6177003913
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2017-11-04kkmrkkblmbrbkC-PRP
M1355989/3983532863256053543143 : EB765901EEA7BEE6
PRP: Verified
PRP without proof (not generated)
2017-09-30Oliver KruseC-PRP
M1355989/3983532863256053543143 : EB765901EEA7BEE6
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-08-03SubPrimeF-ECM
Factor: 3983532863256053543143
2009-02-15Sturle SundeNF
no factor from 2^60 to 2^61