is 2 905173447 - 1
has 272484359 decimal digits
takes 39,358.282 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2710.528257.7465%----0.528257.7465%
Target2858,656.612164.7059%50000002400000001,122.47444.2852%9,779.086566.2183%
Difference-14-8,656.0839-6.9594%-5000000-240000000-1,122.4744-4.2852%-9,778.5584-8.4718%

Known prime factors (1 factor, 69.2 bits, 0.00000764% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
9051734476735140596646250356412169.190372035913060
22 × 3 × 5 × 7 × 41 × 21604873		2017-10-1841216048730.252074.216138.61

P-1 results:
No P-1 results for M905173447


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-11-09lindeed1jcqfj1264265--0.004--
2013-04-25ramgeisManual testing265266--0.008--
2015-02-05Gordon SpenceManual testing266267--0.017--
2016-06-20ConductorManual testing267268--0.033--
2017-04-10ConductorManual testing268269--0.066--
2017-10-13ConductorManual testing269270--0.132--
2017-10-18ConductorManual testing26927169.190210.12088,4950.270


ECM factoring results:
No ECM results for M905173447


Lucas-Lehmer results:
No L-L results for M905173447


PRP results:
No PRP results for M905173447


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
271
270
269
268
267
266
265
this exponent TF target: 85
TF double-checked to: 67.7
250
260
270
280
290
Last modified: 2023-03-25T13:08:14+00:00