is 2 6915011 - 1
has 2081626 decimal digits
takes 1.508 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
Actual2674.297065.6716 %569000128066400022.231311.0538 %26.528369.4662 %
Target2674.297065.6716 %4500045000000.09102.2360 %4.388066.4392 %
Difference---+524000+1276164000+22.1403+8.8178%+22.1403+3.0270 %

Known prime factors (2 factors, 81.5 bits, 0.00117925% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
691501147022074811032.131340
22 × 5 × 17
-5178.883e-111.788e-63.217e-6
69150117502902553983931549.41454250836
22 × 3 × 23 × 196561
2014-04-29231965611.741e-50.00340.0063

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2023-12-27Stef42Manual testing5690001280664000
skipped known factor: 4702207481
skipped known factor: 750290255398393
--20.6711.054%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2014-04-29TJAOIManual testing??
49.414
15


ECM factoring results:
No ECM results for M6915011


Lucas-Lehmer results:
No L-L results for M6915011


PRP results:
dateuseridcompidcofactorsres64
2018-01-23Oliver KruseGTX-6
4702207481
750290255398393
674031ADA7D1469A
2019-01-22LookAShome512
4702207481
750290255398393
674031ADA7D1469A


CERT results:
No CERT results for M6915011


P-1 factor-bounds graph:
B1 = 569000, B2 = 1280664000 (P-1 stage 2)
B1 = 569000 (P-1 stage 1)
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1010
TF factor-bounds graph:
this exponent TF target: 67
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00