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
1872097Factored
FactorDigitsBitsDate
8522009162936779335372169.52009-07-22 23:43:58
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)Joel SmithEB6D1DEBAAE0E11C0
Verified (Factored)1999-01-29Matthew GauthierEB6D1DEBAAE0E11C1738255
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04Oliver Kruse139739BB56584CF91013
Verified2017-11-07kkmrkkblmbrbk139739BB56584CF9195011713
History
DateUserTypeResult
2017-11-07kkmrkkblmbrbkC-PRP
M1872097/852200916293677933537 : 139739BB56584CF9
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1872097/852200916293677933537 : 139739BB56584CF9
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-07-22SubPrimeF-ECM
Factor: 852200916293677933537