Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnDetails
2506807
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
1955941489065827991857.4old
ECM
DigitsB1Curves
2550000184 / 280
Estimated T-Level: 23.3
TF below 2^72 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-14Oliver KruseAE2E10CAC119ABFE158121053
Verified
PRP without proof (not generated)
2017-11-30storm5510AE2E10CAC119ABFE1138802353
History
DateUserTypeResult
2022-08-20USAFSSNF-PM1B1=240000, B2=199861200
2017-11-30storm5510C-PRPM2506807/195594148906582799 : AE2E10CAC119ABFE
2017-10-14Oliver KruseC-PRPM2506807/195594148906582799 : AE2E10CAC119ABFE