is 2 55902871 - 1
has 16828442 decimal digits
takes 118.483 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
Actual2692.135662.3188 %----2.135662.3188 %
Target27334.217364.3836 %3600006000000011.09223.9382 %45.309565.7862 %
Difference-4-32.0817-2.0647 %-360000-60000000-11.0922-3.9382 %-43.1739-3.4674 %

Known prime factors (1 factor, 69.8 bits, 0.00012490% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5590287110448066964567023810712269.8249344839341585
3 × 5 × 11 × 29 × 10733 × 181957
2011-06-05107331819572.51750.06170.0671

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-05kdgehmanManual testing2269.8242.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.15000e-5
2000-03-01ANONYMOUSv4_computers212544.29000e-5
2000-06-11ANONYMOUSv4_computers212560.000
2001-09-22ANONYMOUSv4_computers212570.000
2002-08-17ANONYMOUSv4_computers212580.001
2022-06-14LordJuliusManual testing21263
2008-12-281997rj7compa2632640.035
2009-03-09Old Dufferhomegrown2642660.201
2009-03-14ANONYMOUS2662670.267
2009-05-22xtuhksa-app2672680.535
2011-04-11eon_blue_apocalypsecn1-7apr2682691.069


ECM factoring results:
No ECM results for M55902871


Lucas-Lehmer results:
No L-L results for M55902871


PRP results:
No PRP results for M55902871


CERT results:
No CERT results for M55902871


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
269
268
267
266
264
263
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