is 2 51884321 - 1
has 15618737 decimal digits
takes 99.397 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
Actual2670.572761.1940 %----0.572761.1940 %
Target27336.867564.3836 %340000550000009.21693.8041 %46.084465.7385 %
Difference-6-36.2948-3.1895 %-340000-55000000-9.2169-3.8041 %-45.5117-4.5444 %

Known prime factors (1 factor, 67.7 bits, 0.00013050% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
518843212411825939800019250732167.7092324233885416
23 × 3 × 23 × 509 × 1151 × 7187
2008-12-10115171870.90640.00410.0065

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2008-12-10Tom Duellv4_computers2167.7093.1260.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-12-30Tom Duellv4_computers??
67.709
21
2000-01-04ANONYMOUSv4_computers212532.31000e-5
2000-02-23ANONYMOUSv4_computers212544.63000e-5
2000-04-27ANONYMOUSv4_computers212560.000
2001-06-03ANONYMOUSv4_computers212570.000
2002-03-24ANONYMOUSv4_computers212580.001
2003-11-28apocalypsev4_computers212600.001


ECM factoring results:
No ECM results for M51884321


Lucas-Lehmer results:
No L-L results for M51884321


PRP results:
No PRP results for M51884321


CERT results:
No CERT results for M51884321


P-1 factor-bounds graph:
102
103
104
102
103
104
TF factor-bounds graph:
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