is 2 20486861 - 1
has 6167160 decimal digits
takes 14.519 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
Actual2682.909463.2353%----2.909463.2353%0.0000%
PrimeNet2650.356161.5385%9000032000000.26665.0133%0.622763.4667%1.9282%
GPU722695.827563.7681%15000045000000.39773.7711%6.225265.1344%1.3663%
Difference-1-2.9181-0.5328%-150000-4500000-0.3977-3.7711%-3.3157-1.8991%-1.8991%

Known prime factors (2 factors, 82.8 bits, 0.00040439% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
20486861122921167926.8733
3
-134.367e-131.140e-62.091e-6
20486861707248970804487131755.9731726103796
22 × 3 × 1451 × 99133
2015-08-061451991330.00040.00700.0104

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2048686186935868850836486856080712582.846
P-1 results:
No P-1 results for M20486861


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-02-26T12:23:00TJAOIManual testing255256*55.973170.00029.940.000
2022-06-24T03:14:32LordJuliusManual testing2126526.87394.36667e-1329.949.00541e-13
2022-06-24T03:14:32LordJuliusManual testing2126555.973170.00029.940.001
2022-06-24T03:14:32LordJuliusManual testing265266--0.365--
2022-06-24T03:14:32LordJuliusManual testing266267--0.730--
2022-04-11T17:14:19LordJuliusManual testing267268--1.459--


ECM factoring results:
No ECM results for M20486861


Lucas-Lehmer results:
No L-L results for M20486861


PRP results:
No PRP results for M20486861


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
TF factor-bounds graph:
268
267
266
265
256
220
230
240
250
260
270
280
290
2100
Last modified: 2022-06-24T03:14:32+00:00