is 2 6807637 - 1
has 2049303 decimal digits
takes 1.484 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF05AC84DB6EA2078double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.364865.6716 %54600087586422015.251210.5487 %19.616069.2928 %
Target2674.364865.6716 %4000045000000.08952.1697 %4.454366.4165 %
Difference---+506000+871364220+15.1617+8.3790%+15.1617+2.8764 %

Known prime factors (1 factor, 76.7 bits, 0.00112655% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
68076371220089440124752715749292476.6918961181685544872
23 × 7 × 17 × 47 × 163 × 9949 × 123499
2009-06-2299491234994,278.20.00510.0064

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-06-22Carsten Kossendeymother2476.6910.0200.000%
2023-12-28Stef42128G546000875864220
skipped known factor: 122008944012475271574929
--14.1810.549%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-08-09ANONYMOUSv4_computers212620.045
2004-08-20David Campeauv4_computers212630.144


ECM factoring results:
No ECM results for M6807637


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15ANONYMOUSv4_computers1CED5F585DE67E3E1.484
1999-06-15ANONYMOUSv4_computersF05AC84DB6EA20781.484


PRP results:
dateuseridcompidcofactorsres64
2018-01-12Oliver KruseGTX-3
122008944012475271574929
0B9EA8D71C6F182D
2018-12-22ATHec2-PRPCFDC
122008944012475271574929
0B9EA8D71C6F182D


CERT results:
No CERT results for M6807637


P-1 factor-bounds graph:
B1 = 546000, B2 = 875864220 (P-1 stage 2)
B1 = 546000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
263
262
this exponent TF target: 67
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00