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
3943Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
577554208531175972536082305391931102.2old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000014108 / 40830
Estimated T-Level: 51.7
TF below 2^167 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse783500BB6ABBB4291013
Verified2017-10-12kkmrkkblmbrbk783500BB6ABBB429147113
Verified2020-04-17Oliver Kruse09B61D6595AF20BC155653
Verified2024-02-03Wentao Huang09B61D6595AF20BC1297853
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M3943/5775542085311759725360823053919 : 09B61D6595AF20BC
PRP: Verified
PRP without proof (small exponent)
2023-03-11mikrNF-PM1
B1=500000000000, B2=2621504102555888550
2021-09-09Jinyuan WangNF-PM1
B1=1300000000, B2=13000000000, E=12
2020-04-17Oliver KruseC-PRP
M3943/5775542085311759725360823053919 : 09B61D6595AF20BC
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M3943/5775542085311759725360823053919 : 783500BB6ABBB429
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M3943/5775542085311759725360823053919 : 783500BB6ABBB429
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M3943/5775542085311759725360823053919 : 783500BB6ABBB429
PRP without proof (not generated)