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
1980673Factored
FactorDigitsBitsDate
97728797309457452891963.12009-08-28 02:23:45
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 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)Thomas HonoldCC1BC3E9DE943B2A0
Verified (Factored)1999-04-13Dave BarkerCC1BC3E9DE943B2A1142992
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-05Oliver KruseE4A675FBCDFEC39E1013
Verified2017-11-12kkmrkkblmbrbkE4A675FBCDFEC39E1177953813
History
DateUserTypeResult
2023-09-02Kevin_9611NF-PM1
B1=1000000, B2=1685121900
2022-08-13USAFSSNF-PM1
B1=88000, B2=95986800
2017-11-12kkmrkkblmbrbkC-PRP
M1980673/9772879730945745289 : E4A675FBCDFEC39E
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1980673/9772879730945745289 : E4A675FBCDFEC39E
PRP: Verified
PRP without proof (not generated)
2009-08-28SubPrimeF-ECM
Factor: 9772879730945745289