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
6571Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
717400659886071446.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001299 / 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 Kruse21C4A7A0003026A51013
Verified2017-10-12kkmrkkblmbrbk21C4A7A0003026A51567113
Verified2020-04-17Oliver Kruse88EFE26BC386EE731419253
Verified2024-02-03Wentao Huang88EFE26BC386EE731615353
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M6571/71740065988607 : 88EFE26BC386EE73
PRP: Verified
PRP without proof (small exponent)
2023-08-09-Anonymous-NF-PM1
B1=37000000000, B2=148599418701633900
2021-12-17Oliver KruseNF-PM1
B1=1000000000, B2=1003954060639530
2020-04-17Oliver KruseC-PRP
M6571/71740065988607 : 88EFE26BC386EE73
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M6571/71740065988607 : 21C4A7A0003026A5
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M6571/71740065988607 : 21C4A7A0003026A5
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M6571/71740065988607 : 21C4A7A0003026A5
PRP without proof (not generated)