is 2 55852417 - 1
has 16813253 decimal digits
takes 118.376 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
Actual2692.137562.3188 %----2.137562.3188 %
Target27334.248264.3836 %3600006000000011.09223.9378 %45.340465.7861 %
Difference-4-32.1107-2.0647 %-360000-60000000-11.0922-3.9378 %-43.2029-3.4672 %

Known prime factors (1 factor, 69.2 bits, 0.00012385% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
558524176654382359148938487612169.1735957112258140
22 × 5 × 359 × 389 × 2132857
2011-03-1738921328573.62030.35820.6670

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-03-17kdgehmanManual testing2169.1732.4590.000%


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
2001-09-22ANONYMOUSv4_computers212570.000
2002-08-17ANONYMOUSv4_computers212580.001
2008-11-241997rj7Manual testing212640.035
2009-03-08S00030vd062642650.067
2009-03-16NoWhereManbbox_turion2652660.134
2009-03-19NoWhereManbbox_turion2662670.268
2009-05-28ANONYMOUS2672680.535
2011-03-17kdgehmanManual testing2682691.070


ECM factoring results:
No ECM results for M55852417


Lucas-Lehmer results:
No L-L results for M55852417


PRP results:
No PRP results for M55852417


CERT results:
No CERT results for M55852417


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
TF factor-bounds graph:
269
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