Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
10987Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
197767617.6old
195573972375377676246622996512423023937120.62012-12-04 01:17:14
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000003027 / 9201
Estimated T-Level: 41.6
TF below 2^133 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse726ABF16134273D42013
Verified2017-10-02kkmrkkblmbrbk726ABF16134273D42013
Verified2017-10-12kkmrkkblmbrbk726ABF16134273D42807813
Verified2020-04-17Oliver Kruse3B0EC8D5DE00119421006553
Verified2024-07-01kkmrkkblmbrbk3B0EC8D5DE0011942729553
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M10987/1955739723753776762466229965124230239/197767 : 3B0EC8D5DE001194
PRP: Verified
PRP without proof (small exponent)
2022-12-29-Anonymous-NF-PM1
B1=100000000000, B2=122192573512709700
2020-04-17Oliver KruseC-PRP
M10987/197767/1955739723753776762466229965124230239 : 3B0EC8D5DE001194
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M10987/197767/1955739723753776762466229965124230239 : 726ABF16134273D4
PRP: Verified
PRP without proof (not generated)
2017-10-02kkmrkkblmbrbkC-PRP
M10987/197767/1955739723753776762466229965124230239 : 726ABF16134273D4
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M10987/197767/1955739723753776762466229965124230239 : 726ABF16134273D4
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M10987/197767/1955739723753776762466229965124230239 : 726ABF16134273D4
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2012-12-04SRJ2877F-ECM
Factor: 1955739723753776762466229965124230239