is 2 20178479 - 1
has 6074328 decimal digits
takes 14.300 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2682.953963.2353%----2.953963.2353%0.0000%
PrimeNet2650.361661.5385%9000032000000.26665.0030%0.628263.4627%1.9242%
GPU722695.916563.7681%15000040000000.36973.6723%6.286265.0987%1.3305%
Difference-1-2.9627-0.5328%-150000-4000000-0.3697-3.6723%-3.3323-1.8634%-1.8634%

Known prime factors (2 factors, 87.1 bits, 0.00043177% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2017847940356959825.2661
1
-112.216e-131.028e-62.091e-6
2017847941817424130491153911961.859103618870705
5 × 7 × 73 × 40555331
2016-06-0773405553310.03032.27064.2407

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
201784791687624071119842148208559692787.125
P-1 results:
No P-1 results for M20178479


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-06-07T15:24:48TJAOIManual testing261262*61.859190.01529.480.031
2022-06-24T03:14:31LordJuliusManual testing262265--0.331--
2022-06-24T03:14:31LordJuliusManual testing265266--0.370--
2022-06-24T03:14:31LordJuliusManual testing266267--0.741--
2022-04-11T17:14:14LordJuliusManual testing267268--1.481--


ECM factoring results:
No ECM results for M20178479


Lucas-Lehmer results:
No L-L results for M20178479


PRP results:
No PRP results for M20178479


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
268
267
266
265
262
220
230
240
250
260
270
280
290
2100
Last modified: 2022-06-24T03:14:31+00:00