is 2 1636549 - 1
has 492651 decimal digits
takes 0.073 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
Actual26718.156468.6567 %500000150000000.08355.0007 %18.240070.2241 %
Target2610.187765.5738 %65003500000.00161.1193 %0.189365.9591 %
Difference+6+17.9687+3.0829 %+493500+14650000+0.0819+3.8814%+18.0507+4.2650 %

Known prime factors (2 factors, 78.4 bits, 0.00478803% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16365492084014227591237.60163671
63671
-1636711.993e-80.00020.0004
163654918592505879211340.758568040
23 × 5 × 11 × 1291
2008-07-151112911.747e-75.229e-68.536e-6

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing5000001500000012
skipped known factor: 208401422759
skipped known factor: 1859250587921
---8.758%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-07-15J FeitsmaManual testing??
40.758
13


ECM factoring results:
Total ECM effort:31.445 GHz-days
Estimated T-Level:25.718
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025114.10
250000400000005017.34


Lucas-Lehmer results:
No L-L results for M1636549


PRP results:
dateuseridcompidcofactorsres64
2017-10-02Oliver KruseGTX-2
208401422759
1859250587921
1A1D5C28F4327E61
2017-11-02kkmrkkblmbrbkc4.xlarge
208401422759
1859250587921
1A1D5C28F4327E61


CERT results:
No CERT results for M1636549


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
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103
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105
106
100
101
102
103
104
105
106
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108
TF factor-bounds graph:
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00