is 2 20005541 - 1
has 6022268 decimal digits
takes 12.948 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
Actual2682.979463.2353%----2.979463.2353%0.0000%
PrimeNet2650.364761.5385%9000032000000.24354.9971%0.608263.4604%1.9220%
GPU722695.967763.7681%14000040000000.32883.6276%6.296465.0825%1.3144%
Difference-1-2.9883-0.5328%-140000-4000000-0.3288-3.6276%-3.3170-1.8472%-1.8472%

Known prime factors (2 factors, 90.1 bits, 0.00045029% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
20005541160044329927.2544
22
-448.945e-133.754e-67.640e-6
2000554181971718542085953591962.830204872536419
3 × 170603 × 400291
2016-10-211706034002910.07250.17190.3258

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2000554113119108691045004702636691112890.084
P-1 results:
No P-1 results for M20005541


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-10-21T15:25:13TJAOIManual testing262263*62.830190.04226.680.086
2022-06-24T02:43:38LordJuliusManual testing263265--0.285--
2022-06-24T02:43:38LordJuliusManual testing265266--0.374--
2022-06-24T02:43:38LordJuliusManual testing266267--0.747--
2022-04-11T17:14:11LordJuliusManual testing267268--1.494--


ECM factoring results:
No ECM results for M20005541


Lucas-Lehmer results:
No L-L results for M20005541


PRP results:
No PRP results for M20005541


P-1 factor-bounds graph:
100
101
102
103
104
105
106
100
101
102
103
104
105
106
TF factor-bounds graph:
268
267
266
265
263
220
230
240
250
260
270
280
290
2100
Last modified: 2022-06-24T02:43:38+00:00