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
1887169Factored
FactorDigitsBitsDate
268346701768370389426972374.52008-10-31 15:43:50
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)Eric PrestemonAD5EF32242D721450
Verified (Factored)1999-03-15Richard BlandAD5EF32242D721451410584
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04Oliver KruseD9EBCFEEF25509901013
Verified2017-11-08kkmrkkblmbrbkD9EBCFEEF25509901155150813
History
DateUserTypeResult
2017-11-08kkmrkkblmbrbkC-PRP
M1887169/26834670176837038942697 : D9EBCFEEF2550990
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1887169/26834670176837038942697 : D9EBCFEEF2550990
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-10-31James HeinrichF-ECM
Factor: 26834670176837038942697