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
7949Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
4090613277383774091858.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000006059 / 9201
Estimated T-Level: 43.3
TF below 2^139 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse9B4CE8843EEB75D81013
Verified2017-10-12kkmrkkblmbrbk9B4CE8843EEB75D81687313
Verified2020-04-17Oliver Kruse65793BD38407F5D2139853
Verified2024-07-01kkmrkkblmbrbk65793BD38407F5D21666653
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M7949/409061327738377409 : 65793BD38407F5D2
PRP: Verified
PRP without proof (small exponent)
2023-05-24JacobZNF-PM1
B1=60000000000, B2=244568457101868900
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M7949/409061327738377409 : 65793BD38407F5D2
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M7949/409061327738377409 : 9B4CE8843EEB75D8
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7949/409061327738377409 : 9B4CE8843EEB75D8
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7949/409061327738377409 : 9B4CE8843EEB75D8
PRP without proof (not generated)