is 2 490000003 - 1
has 147504699 decimal digits
takes 11,851.875 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
Actual2821,998.911864.6341 %2800000120000000322.14854.3241 %2,321.060266.1634 %
Target2821,998.911864.6341 %28000006000000001,239.33854.3241 %3,238.250266.1634 %
Difference-----480000000-917.1900--917.1900-

Known prime factors (1 factor, 95.8 bits, 0.00001956% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
490000003704268175622729640227128735272995.83071864099113355478921
3 × 463291 × 1126513 × 45898729
2021-01-1811265134589872916,375,088125.06163.81

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-01-18Krieselostrich2800000120000000622995.830335.94.324%


Trial Factoring results:
5758596061626364656667686970717273747576777879808182
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2023-10-18James HeinrichManual testing267268
2009-09-25rudimeierbonnie2682690.122
2009-09-25rudimeierbonnie2692700.244
2009-09-26rudimeierbonnie2702710.488
2009-11-01rudimeierhomer2712720.976
2010-04-09rudimeiershakti2722731.952
2010-11-19rudimeierakne2732743.904
2013-07-31rudimeierurvasi2742757.808
2013-12-04rudimeiervolos27527615.62
2013-12-23rudimeiervolos27627731.23
2014-01-23rudimeiervolos27727862.47
2020-12-21KrieselManual testing278279124.9
2020-12-21KrieselManual testing279280249.9
2020-12-21KrieselManual testing280281499.7
2020-12-21KrieselManual testing281282999.5


ECM factoring results:
No ECM results for M490000003


Lucas-Lehmer results:
No L-L results for M490000003


PRP results:
No PRP results for M490000003


CERT results:
No CERT results for M490000003


P-1 factor-bounds graph:
B1 = 2800000, B2 = 120000000 (P-1 stage 2)
B1 = 2800000 (P-1 stage 1)
105
106
107
105
106
107
108
109
TF factor-bounds graph:
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281
280
279
278
277
276
275
274
273
272
271
270
269
268
this exponent TF target: 82
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00