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

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Exponent Range:










MnStatusDetails
6563Composite, with 5 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
13127513.7old
26777041824.7old
179209279927.4old
341285975771135.0old
3651734519329311936370492478.3old
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 Kruse4F8527DA4EDB1CC45013
Verified2017-10-02kkmrkkblmbrbk4F8527DA4EDB1CC45013
Verified2017-12-07ATH4F8527DA4EDB1CC457813
Verified2020-04-17Oliver Kruse8DDF1279A0DEA02E5412353
Verified (Factored)2022-05-12Jorge Coveiro8DDF1279A0DEA02E1324553
Verified2024-02-03Wentao Huang8DDF1279A0DEA02E5385153
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M6563/13127/26777041/179209279/34128597577/365173451932931193637049 : 8DDF1279A0DEA02E
PRP: Verified
PRP without proof (small exponent)
2023-08-09-Anonymous-NF-PM1
B1=37000000000, B2=148599418701633900
2022-05-12Jorge CoveiroC-PRP
M6563/13127 : 8DDF1279A0DEA02E
PRP: Verified
PRP without proof (small exponent)
2021-08-27Seth_TrNF-PM1
B1=400000000
2021-08-27Seth_TrNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M6563/13127/26777041/179209279/34128597577/365173451932931193637049 : 8DDF1279A0DEA02E
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M6563/13127/26777041/179209279/34128597577/365173451932931193637049 : 4F8527DA4EDB1CC4
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M6563/13127/26777041/179209279/34128597577/365173451932931193637049 : 4F8527DA4EDB1CC4
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M6563/known_factors : 4F8527DA4EDB1CC4
PRP without proof (not generated)