Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
7963Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
152889601927.2old
42731925462480231651.9old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000005985 / 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 Kruse71BA76F1B0C3232A2013
Verified2017-10-12kkmrkkblmbrbk71BA76F1B0C3232A2493213
Verified2020-04-17Oliver Kruse6A86FAC02BCB820D2649653
Verified2024-07-01kkmrkkblmbrbk6A86FAC02BCB820D2343153
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M7963/152889601/4273192546248023 : 6A86FAC02BCB820D
PRP: Verified
PRP without proof (small exponent)
2023-05-25JacobZNF-PM1
B1=59000000000, B2=236984939060469600
2020-04-17Oliver KruseC-PRP
M7963/152889601/4273192546248023 : 6A86FAC02BCB820D
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M7963/152889601/4273192546248023 : 71BA76F1B0C3232A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7963/152889601/4273192546248023 : 71BA76F1B0C3232A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7963/152889601/4273192546248023 : 71BA76F1B0C3232A
PRP without proof (not generated)