is 2 4042673 - 1
has 1216966 decimal digits
takes 0.504 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677.350167.1642%----7.350167.1642%0.0000%
PrimeNet2610.076063.9344%160003200000.00592.7331%0.081964.9201%0.9857%
GPU722651.804766.1538%220003600000.00731.7526%1.812066.7470%0.5932%
Difference+2+5.5454+1.0103%-22000-360000-0.0073-1.7526%+5.5381+0.4172%+0.4172%

Known prime factors (2 factors, 105.8 bits, 0.00261821% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
404267324256039824.5323
3
-135.532e-132.006e-73.681e-7
404267330050481327840263761809612581.314371665990890683760
24 × 3 × 5 × 191 × 266381 × 30437219
2021-08-0526638130437219202,9500.34540.5601

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
40426737289056470568652235767406107347932105.846
P-1 results:
Exponent "4042673" not found


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-08-05T19:07:12ATHec2-P_15000005000000027P-12581.3140.543


Trial Factoring results:
Exponent "4042673" not found


ECM factoring results:

Old Calculation Method

Total ECM effort:0.541 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.541 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.09790.776%
25500000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.541


Lucas-Lehmer results:
Exponent "4042673" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:24:44kkmrkkblmbrbkManual testing
24256039
3160E2887586D6__no
2018-01-08T00:59:35Oliver KruseGTX-2
24256039
3160E2887586D6__no
2021-08-05T22:43:55ATHec2-PRPCF
24256039
3005048132784026376180961
58E417350635C0A1no


P-1 factor-bounds graph:
B1 = 500000, B2 = 50000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2021-08-05T22:43:55+00:00