is 2 55803823 - 1
has 16798625 decimal digits
takes 118.273 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
Actual2681.068161.7647 %----1.068161.7647 %
Target27334.278064.3836 %3600006000000011.09223.9373 %45.370365.7859 %
Difference-5-33.2099-2.6189 %-360000-60000000-11.0922-3.9373 %-44.3021-4.0212 %

Known prime factors (1 factor, 71.1 bits, 0.00012737% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5580382324870400491395477819932271.07522283778381452
22 × 7 × 31 × 35449 × 724211
2011-07-223544972421117.0850.22430.2265

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-07-22David HruskaDesktopII2271.0755.1890.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.15000e-5
2000-03-01ANONYMOUSv4_computers212544.30000e-5
2000-06-11ANONYMOUSv4_computers212560.000
2001-09-30ANONYMOUSv4_computers212570.000
2002-08-17ANONYMOUSv4_computers212580.001
2008-11-031997rj7Manual testing212640.034
2009-05-03stevecodyMacMini2642650.067
2009-11-18Tommy BoucherSidney2652660.134
2009-11-21Tommy BoucherSidney2662670.268
2009-12-02Tommy BoucherSidney2672680.536


ECM factoring results:
No ECM results for M55803823


Lucas-Lehmer results:
No L-L results for M55803823


PRP results:
No PRP results for M55803823


CERT results:
No CERT results for M55803823


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
268
267
266
265
264
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