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

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MnStatusDetails
6386417Factored
FactorDigitsBitsDate
422369964254083613212065.22018-07-19 13:21:52
14801633816182764873292270.32014-10-20 02:04:48
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ernst W. Mayer86AB548FC9F4C6F40
Verified (Factored)1998-12-21Carl-Christian Kanne86AB548FC9F4C6F40
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-11-03kkmrkkblmbrbkFB165B62B541A85C1475308253
Verified2018-07-24_p95holder_FB165B62B541A85C2610570353
P-1 factors
DateFactorB1B2
2014-10-2014801633816182764873293900009750000
History
DateUserTypeResult
2022-03-19LordJuliusNF
no factor from 2^62 to 2^63
2018-07-24_p95holder_C-PRP
M6386417/1480163381618276487329/42236996425408361321 : FB165B62B541A85C
PRP: Verified
PRP without proof (not generated)
2018-07-19TJAOIF
Factor: 42236996425408361321 / TF: 65-66
2017-11-03kkmrkkblmbrbkC-PRP
M6386417/1480163381618276487329 : FB165B62B541A85C
PRP: Verified
PRP without proof (not generated)
2014-10-20NesowaF-PM1
Factor: 1480163381618276487329 / (P-1, B1=390000, B2=9750000, E=12)
2014-08-19lycornNF
no factor from 2^64 to 2^65
2014-08-17NesowaNF
no factor from 2^63 to 2^64
2009-06-20Carsten KossendeyNF-PM1
B1=35000, B2=490000