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
2620483
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
26204831824.6old
235843471927.82008-07-14 20:29:10
308430849111134.82008-07-14 20:29:10
ECM
DigitsB1Curves
255000080 / 280
Estimated T-Level: 21.4
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-17Oliver Kruse8C3A6A8095E01FCA3146102853
Verified
PRP without proof (not generated)
2017-12-02storm55108C3A6A8095E01FCA3113573853
History
DateUserTypeResult
2019-07-04alpertronNF-PM1B1=2000000, B2=60000000, E=12
2017-12-02storm5510C-PRPM2620483/26204831/235843471/30843084911 : 8C3A6A8095E01FCA
2017-10-17Oliver KruseC-PRPM2620483/26204831/235843471/30843084911 : 8C3A6A8095E01FCA
2008-07-14George WoltmanF-ECMFactor: 30843084911
2008-07-14George WoltmanF-ECMFactor: 235843471