is 2 55649339 - 1
has 16752121 decimal digits
takes 117.946 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
Actual2692.145362.3188 %----2.145362.3188 %
Target27334.373264.3836 %3600006000000011.09223.9359 %45.465465.7854 %
Difference-4-32.2278-2.0647 %-360000-60000000-11.0922-3.9359 %-43.3201-3.4666 %

Known prime factors (1 factor, 69.5 bits, 0.00012493% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
556493398493574683133293556072169.5257631334743377
108187 × 70538371
2011-05-31108187705383712.162512.12522.059

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-05-31Paul LeylandManual testing2169.5252.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.16000e-5
2000-03-01ANONYMOUSv4_computers212544.31000e-5
2000-05-31ANONYMOUSv4_computers212560.000
2001-09-30ANONYMOUSv4_computers212570.000
2008-08-25ANONYMOUSManual testing212640.034
2009-01-05lindedGBC-Sankie2642650.067
2009-01-06lindedGBC-Sankie2652660.134
2009-01-07David Barleyscrappy2662670.269
2009-09-22Gymnasium_Raublingc42672680.537
2011-04-12ANONYMOUS2682691.074


ECM factoring results:
No ECM results for M55649339


Lucas-Lehmer results:
No L-L results for M55649339


PRP results:
No PRP results for M55649339


CERT results:
No CERT results for M55649339


P-1 factor-bounds graph:
104
105
106
104
105
106
107
108
TF factor-bounds graph:
269
268
267
266
265
264
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