is 2 40405217 - 1
has 12163183 decimal digits
takes 59.556 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
Actual2692.954762.3188 %----2.954762.3188 %
Target27223.668663.8889 %280000450000005.80573.8106 %29.474365.2649 %
Difference-3-20.7138-1.5700 %-280000-45000000-5.8057-3.8106 %-26.5196-2.9461 %

Known prime factors (1 factor, 73.4 bits, 0.00018174% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
40405217127501208068658017511292373.433157778150366892
22 × 3 × 11 × 1657 × 4889 × 147547
2010-01-16488914754748.6940.02710.0321

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2010-01-16WRwr142373.4331.1450.000%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2007-01-01ANONYMOUSv4_computers212691.480


ECM factoring results:
No ECM results for M40405217


Lucas-Lehmer results:
No L-L results for M40405217


PRP results:
No PRP results for M40405217


CERT results:
No CERT results for M40405217


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
269
this exponent TF target: 72
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00