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
2323907
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 262
Factored
FactorDigitsBitsDate
861628159408197454872066.22010-01-19 05:50:27
ECM
DigitsB1Curves
2550000280 / 280
30250000124 / 640
Estimated T-Level: 26.0
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
FactoredRandy NerwickD0EF6CBBF518BF290Windows 16-bit,Prime95,v14,(aka WQ0)
Factored1999-03-15Louis TowlesD0EF6CBBF518BF292119278Linux 32-bit,Prime95,v17,(aka WT2)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-11Oliver Kruse508BB02F6E8D97211013
Verified
PRP without proof (not generated)
2017-11-23storm5510508BB02F6E8D97211202765613
History
DateUserTypeResult
2021-04-26ViliamFNF-PM1B1=5000000, B2=305000000
2018-03-05alpertronNF-PM1B1=500000, B2=15000000, E=12
2017-11-23storm5510C-PRPM2323907/86162815940819745487 : 508BB02F6E8D9721
2017-10-11Oliver KruseC-PRPM2323907/86162815940819745487 : 508BB02F6E8D9721
2010-01-19mdrgF-ECMFactor: 86162815940819745487
2009-01-16Sturle SundeNFno factor TF: 60-61
2003-09-14-anonymous-NF-PM1B1=2048, B2=204800
1999-03-15-anonymous-C-LLD0EF6CBBF518BF29