is 2 51315799 - 1
has 15447595 decimal digits
takes 94.008 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
Actual2670.579061.1940 %----0.579061.1940 %
Target27337.275964.3836 %340000550000008.81373.7987 %46.089765.7365 %
Difference-6-36.6969-3.1895 %-340000-55000000-8.8137-3.7987 %-45.5106-4.5425 %

Known prime factors (1 factor, 67.4 bits, 0.00013127% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
513157991897243826884724530072167.3621848596206097
19 × 163 × 1861 × 320741
2008-12-1818613207411.12590.05110.0867

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2008-12-18Mikyav4_computers2167.3623.1260.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-12-30Mikyav4_computers??
67.362
21
1999-10-15ANONYMOUSv4_computers212532.34000e-5
2000-02-16ANONYMOUSv4_computers212544.68000e-5
2000-04-05ANONYMOUSv4_computers212560.000
2001-05-06ANONYMOUSv4_computers212570.000
2002-02-10ANONYMOUSv4_computers212580.001
2003-10-14apocalypsev4_computers212600.001
2022-04-05LordJuliusManual testing260263
2008-11-27ANONYMOUSBLACK2632640.038
2008-12-30Mikyav4_computers2642670.510


ECM factoring results:
No ECM results for M51315799


Lucas-Lehmer results:
No L-L results for M51315799


PRP results:
No PRP results for M51315799


CERT results:
No CERT results for M51315799


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
267
264
263
260
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00