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
6961Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
584208887929.1old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001282 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseBEB46A0DDFA514251013
Verified2017-10-12kkmrkkblmbrbkBEB46A0DDFA514251481313
Verified2020-04-17Oliver Kruse249FAFEC493A98141381753
Verified2024-02-03Wentao Huang249FAFEC493A98141483253
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M6961/584208887 : 249FAFEC493A9814
PRP: Verified
PRP without proof (small exponent)
2023-08-19-Anonymous-NF-PM1
B1=35000000000, B2=143589103727719650
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M6961/584208887 : 249FAFEC493A9814
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M6961/584208887 : BEB46A0DDFA51425
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M6961/584208887 : BEB46A0DDFA51425
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M6961/584208887 : BEB46A0DDFA51425
PRP without proof (not generated)