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
2506873
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
220203724331134.4old
1479768307255924571857.02015-05-20 11:09:22
ECM
DigitsB1Curves
2550000193 / 280
Estimated T-Level: 23.4 ⓘ
TF below 2^73 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 Kruse14130A534A328CE82133047953
Verified
PRP without proof (not generated)
2017-11-30storm551014130A534A328CE82196450653
History
DateUserTypeResult
2022-08-20USAFSSNF-PM1B1=240000, B2=199861200
2017-11-30storm5510C-PRPM2506873/22020372433/147976830725592457 : 14130A534A328CE8
2017-10-14Oliver KruseC-PRPM2506873/22020372433/147976830725592457 : 14130A534A328CE8
2015-05-20TJAOIFFactor: 147976830725592457