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
260171Factored
FactorDigitsBitsDate
86138492560444936631962.92007-09-12 04:37:53
ECM
DigitsB1Curves
2550000280 / 280
30250000460 / 640
Estimated T-Level: 28.6 ⓘ
TF below 2^90 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver KruseD870D0F0F51CAA381013
Verified2017-10-12kkmrkkblmbrbkD870D0F0F51CAA38116305313
Unverified (Reliable)2020-04-17Oliver Kruse596EF67FFD2E3C__19852253
History
DateUserTypeResult
2022-05-02Oliver KruseNF-PM1
B1=30000000, B2=10035812696910
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2021-09-14Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M260171/8613849256044493663 : 596EF67FFD2E3C__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M260171/8613849256044493663 : D870D0F0F51CAA38
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M260171/8613849256044493663 : D870D0F0F51CAA38
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M260171/8613849256044493663 : D870D0F0F51CAA38
PRP without proof (not generated)
2007-09-12Chad DavisF-ECM
Factor: 8613849256044493663