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
2778823Factored
FactorDigitsBitsDate
2717211990013676971672167.92010-11-27 11:53:27
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Bill Hirst8680F4386DAFE74E0
Verified (Factored)Skip Zogopoulos8680F4386DAFE74E0
Verified (Factored)1999-08-07Marco Bresolin8680F4386DAFE74E1541665
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21Oliver Kruse9239399D69C2C671160079853
Verified2017-12-06trebor9239399D69C2C6711226395853
History
DateUserTypeResult
2023-01-27USAFSSNF-PM1
B1=288000, B2=261254070
2017-12-06treborC-PRP
M2778823/271721199001367697167 : 9239399D69C2C671
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2778823/271721199001367697167 : 9239399D69C2C671
PRP: Verified
PRP without proof (not generated)
2010-11-27markrF-PM1
Factor: 271721199001367697167
2010-11-10JossNF-PM1
B1=15000
2009-01-28Sturle SundeNF
no factor from 2^60 to 2^61