is 2 1713121 - 1
has 515701 decimal digits
takes 0.081 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
Actual26717.344968.6567 %500000150000000.08805.0284 %17.432970.2328 %
Target2610.179365.5738 %70005500000.00251.3425 %0.181866.0359 %
Difference+6+17.1656+3.0829 %+493000+14450000+0.0855+3.6859%+17.2511+4.1968 %

Known prime factors (3 factors, 129.8 bits, 0.00757957% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
171312127409937824.7088
23
-881.307e-125.459e-71.111e-6
171312182229809826.29324
23 × 3
2008-07-15885.246e-125.459e-71.111e-6
17131215431760819709403350434392478.846158534067929510039
13 × 43 × 127 × 241 × 857 × 10812079
2015-06-018571081207963,1070.04030.0751

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-06-01alpertronManual testing500000150000001222478.8460.1018.802%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-07-15J FeitsmaManual testing??
26.293
8


ECM factoring results:
Total ECM effort:35.358 GHz-days
Estimated T-Level:25.709
DigitsB1CompleteFacMiss
201100014.9310.000%
25500001.68118.619%
302500000.14286.785%
3510000000.01099.033%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026618.08
250000400000004717.28


Lucas-Lehmer results:
No L-L results for M1713121


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-3
27409937
82229809
543176081970940335043439
9B6622CD18ACCAF4
2017-10-05Oliver KruseManual testing
27409937
82229809
543176081970940335043439
9B6622CD18ACCAF4
2017-11-10kkmrkkblmbrbkc4.xlarge
27409937
82229809
543176081970940335043439
9B6622CD18ACCAF4


CERT results:
No CERT results for M1713121


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00