Marin Mersenne 2^P-1
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MnStatusDetails
199603Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
34781982449737454811961.62009-05-01 05:36:52
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000182 / 1566
Estimated T-Level: 30.6
TF below 2^97 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Amdahl 6 - 1989119EC9630
Verified (Factored)Martin EiblAE82222CD19EC9630
Verified (Factored)Brian J. BeesleyAE82222CD19EC9630
Verified (Factored)Eivind TrielAE82222CD19EC963156135
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse852EB035BEB1D0A21013
Verified2017-10-12kkmrkkblmbrbk852EB035BEB1D0A2118803613
Verified2020-04-17Oliver KruseBA1FB69260850A3F111191053
Verified2023-08-24USAFSSBA1FB69260850A3F17693053
History
DateUserTypeResult
2023-08-24curtiscCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M199603/3478198244973745481 : BA1FB69260850A3F
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-07LordJuliusNF
no factor from 2^57 to 2^58
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-17Oliver KruseC-PRP
M199603/3478198244973745481 : BA1FB69260850A3F
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2017-10-12kkmrkkblmbrbkC-PRP
M199603/3478198244973745481 : 852EB035BEB1D0A2
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M199603/3478198244973745481 : 852EB035BEB1D0A2
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M199603/3478198244973745481 : 852EB035BEB1D0A2
PRP without proof (not generated)
2009-05-01Sturle SundeF-ECM
Factor: 3478198244973745481
2009-02-09axnNF-PM1
B1=5000000, B2=200000000, E=12
2009-01-30Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59