Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
382763Factored
FactorDigitsBitsDate
28575731192086579031961.32007-12-31 23:09:46
ECM
DigitsB1Curves
2550000280 / 280
30250000228 / 640
Estimated T-Level: 26.8 ⓘ
TF below 2^84 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-23Oliver KruseAAF8454F8A8D251D1013
Verified2017-09-24Oliver KruseAAF8454F8A8D251D1013
Verified2017-11-07kkmrkkblmbrbkAAF8454F8A8D251D120577413
Unverified (Reliable)2020-04-18Oliver KruseF7CDF6BACD24AE__112666653
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2021-07-06George WoltmanNF-PP1
Start=2/7, B1=7500000, B2=592500000
2021-07-06George WoltmanNF-PM1
B1=15000000, B2=1365000000
2020-04-18Oliver KruseC-PRP
M382763/2857573119208657903 : F7CDF6BACD24AE__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-07kkmrkkblmbrbkC-PRP
M382763/2857573119208657903 : AAF8454F8A8D251D
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M382763/2857573119208657903 : AAF8454F8A8D251D
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-23Oliver KruseC-PRP
M382763/2857573119208657903 : AAF8454F8A8D251D
PRP: Unverified (Reliable)
PRP without proof (not generated)
2008-01-01Sturle SundeF-ECM
Factor: 2857573119208657903
2007-12-31Chad DavisF-ECM
Factor: 2857573119208657903