is 2 42918163 - 1
has 12919655 decimal digits
takes 63.260 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
Actual2681.388861.7647 %----1.388861.7647 %
Target27222.282763.8889 %300000450000005.84623.8793 %28.128965.2898 %
Difference-4-20.8939-2.1242 %-300000-45000000-5.8462-3.8793 %-26.7401-3.5250 %

Known prime factors (1 factor, 70.1 bits, 0.00016339% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4291816312854086242923076927432270.12314975112335217
3 × 29 × 349 × 3637 × 135607
2009-10-0136371356077.37300.02310.0295

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-10-01James D-PKU_Core22270.1231.3090.000%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2007-07-24tmorrowv4_computers212680.696


ECM factoring results:
No ECM results for M42918163


Lucas-Lehmer results:
No L-L results for M42918163


PRP results:
No PRP results for M42918163


CERT results:
No CERT results for M42918163


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
268
this exponent TF target: 72
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00