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

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MnStatusDetails
2341217Composite, with 2 known prime factors. Cofactor reported as composite (unverified, reliable)
Factored
FactorDigitsBitsDate
14047303823.7old
10005534996267693803592012579.72025-10-22 20:33:42
ECM
DigitsB1Curves
2550000280 / 280
3025000069 / 640
Estimated T-Level: 25.5
TF below 2^80 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-12Oliver Kruse6FC79BC6624027BB1013
Verified (Factored)2017-11-24storm55106FC79BC6624027BB1215500313
Unverified (Reliable)2025-10-22debrouxl7FA721A4B2DC88__219922653
History
DateUserTypeResult
2025-10-22debrouxlC-PRP
M2341217/14047303/1000553499626769380359201 : 7FA721A4B2DC88__
PRP proof power = 7
PRP: Unverified (Reliable)
PRP proof not yet uploaded
2025-10-22debrouxlF-ECM
Factor: 1000553499626769380359201 / (ECM curve 17, B1=94001, B2=211882125, Edwards Sigma=4942327378279923)
2018-03-18alpertronNF-PM1
B1=500000, B2=15000000, E=12
2017-11-24storm5510C-PRP
M2341217/14047303 : 6FC79BC6624027BB
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-12Oliver KruseC-PRP
M2341217/14047303 : 6FC79BC6624027BB
PRP: Verified (Factored)
PRP without proof (not generated)