is 2 13687591 - 1
has 4120376 decimal digits
takes 6.073 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.170964.1791 %3000002030792407.30068.8799 %9.471467.3600 %
Target2698.722365.2174 %90000110000000.44032.7882 %9.162666.1872 %
Difference-2-6.5514-1.0383 %+210000+192079240+6.8603+6.0917%+0.3089+1.1728 %

Known prime factors (2 factors, 132.7 bits, 0.00096973% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1368759116521001451275991650.55360350289
3 × 17 × 19 × 61 × 1021
-6110212.009e-57.289e-57.987e-5
1368759154776417710093472717064312582.180200095172737457865
3 × 5 × 7 × 192 × 41 × 4273 × 30131681
2022-08-1642733013168186,1961.05871.9726

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-07-28nordisweet16_30.8b14300000300000
skipped known factor: 1652100145127599
--0.2081.708%
2022-08-16nordisweet16_30.8b1430000020307924022582.1808.2527.422%


Trial Factoring results:
57585960616263646566676869
No TF results for M13687591


ECM factoring results:
No ECM results for M13687591


Lucas-Lehmer results:
No L-L results for M13687591


PRP results:
dateuseridcompidcofactorsres64
2022-09-12Perigbruinneall
1652100145127599
5477641771009347271706431
4B9170F69AB16801


CERT results:
dateuseridcompid
2022-09-12curtiscot014031


P-1 factor-bounds graph:
B1 = 300000, B2 = 203079240 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
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TF factor-bounds graph:
this exponent TF target: 69
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00