is 2 40576147 - 1
has 12214638 decimal digits
takes 59.808 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L83280EFA79085FC2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2692.942362.3188 %490000116375002.34535.7651 %5.287664.4912 %
Target27223.568963.8889 %280000450000005.80573.8127 %29.374665.2657 %
Difference-3-20.6266-1.5700 %+210000-33362500-3.4605+1.9524%-24.0870-0.7745 %

Known prime factors (1 factor, 68.7 bits, 0.00016926% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
405761474727615034910671315432168.6805825608620393
3 × 53 × 36639047927
2013-11-0853366390479272.70414,266.47,968.4

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2008-09-06Freightyardv4_computers49000011637500--2.3454.323%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2007-01-16Hazmattomv4_computers212680.737
2013-11-08Carsten KossendeyManual testing268269
68.680
21
2.014


ECM factoring results:
No ECM results for M40576147


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2008-10-27Freightyardv4_computers83280EFA79085FC270.44
2008-11-18Freightyardv4_computers83280EFA79085FC259.81


PRP results:
No PRP results for M40576147


CERT results:
No CERT results for M40576147


P-1 factor-bounds graph:
B1 = 490000, B2 = 11637500 (P-1 stage 2)
B1 = 490000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
269
268
this exponent TF target: 72
TF double-checked to: 67
250
260
270
280
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00