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
8287Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
36877151825.1old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000005575 / 16550
Estimated T-Level: 46.7
TF below 2^150 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-25Oliver KruseE6999CE3BBB2B7171013
Verified2017-09-25George WoltmanE6999CE3BBB2B717159713
Verified2017-09-27Oliver KruseE6999CE3BBB2B7171013
Verified2020-04-17Oliver Kruse5446982F4EAFE48C1389053
Verified2024-07-01kkmrkkblmbrbk5446982F4EAFE48C1275353
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M8287/36877151 : 5446982F4EAFE48C
PRP: Verified
PRP without proof (small exponent)
2023-08-30JacobZNF-PM1
B1=71000000000, B2=265422648792401100
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M8287/36877151 : 5446982F4EAFE48C
PRP: Verified
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M8287/36877151 : E6999CE3BBB2B717
PRP: Verified
PRP without proof (not generated)
2017-09-25George WoltmanC-PRP
M8287/36877151 : E6999CE3BBB2B717
PRP: Verified
PRP without proof (not generated)
2017-09-25Oliver KruseC-PRP
M8287/36877151 : E6999CE3BBB2B717
PRP: Verified
PRP without proof (not generated)