is 2 639208861 - 1
has 192421041 decimal digits
takes 19,331.629 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
Actual2745.985359.4595%----5.985359.4595%0.0000%
PrimeNet279191.538662.0253%2400000160000000481.78405.9068%673.322664.2684%2.2431%
GPU722833,064.622363.8554%3600000160000000531.53984.4080%3,596.162165.4487%1.5932%
Difference-9-3,058.6370-4.3960%-3600000-160000000-531.5398-4.4080%-3,590.1768-5.9892%-1.5932%

Known prime factors (2 factors, 131.6 bits, 0.00002058% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
639208861191585815083335993292064.05514986167024
24 × 3 × 3931 × 79423
2012-01-223931794230.00610.35270.3544
6392088612089696316281550540472167.502163459586043
32 × 13 × 101 × 13832579
2022-09-21101138325790.083033.05361.726

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
639208861400356172031445547951412446641403793446340131.556
P-1 results:
No P-1 results for M639208861


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2012-01-22T05:48:00Lukin DmitryAstor??64.055200.00139,5670.001
2010-08-01T23:34:00Architects CubedManual testing263264--0.003--
2022-09-21T07:12:10TJAOIManual testing267268*67.502210.03639,5670.075
2022-09-25T22:01:36LordJuliusManual testing2127064.055200.00639,5670.013
2022-09-25T22:01:36LordJuliusManual testing2127067.502210.08339,5670.170
2022-09-25T22:01:36LordJuliusManual testing270271--0.374--
2022-09-25T22:01:36LordJuliusManual testing271272--0.748--
2022-09-25T22:01:36LordJuliusManual testing272273--1.496--
2022-09-25T22:01:36LordJuliusManual testing273274--2.993--


ECM factoring results:
No ECM results for M639208861


Lucas-Lehmer results:
No L-L results for M639208861


PRP results:
No PRP results for M639208861


P-1 factor-bounds graph:
101
102
103
104
101
102
103
104
105
106
107
108
TF factor-bounds graph:
274
273
272
271
270
268
264
2
250
260
270
280
290
2100
Last modified: 2022-09-25T22:01:36+00:00