is 2 1674767 - 1
has 504156 decimal digits
takes 0.079 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3111DF9BA0536A35double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26717.742168.6567 %500000150000000.08805.0147 %17.830270.2285 %
Target2610.183465.5738 %70004000000.00191.2075 %0.185465.9895 %
Difference+6+17.5587+3.0829 %+493000+14600000+0.0861+3.8072%+17.6448+4.2390 %

Known prime factors (1 factor, 63.9 bits, 0.00381261% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1674767166516547901515169112063.8524971334755865
5 × 311 × 769 × 4157347
2008-06-0676941573470.95300.01550.0289

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing5000001500000012
skipped known factor: 16651654790151516911
---8.780%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-11-14ANONYMOUSv4_computers212570.011
2003-04-03ANONYMOUSv4_computers212580.023


ECM factoring results:
Total ECM effort:38.263 GHz-days
Estimated T-Level:25.716
DigitsB1CompleteFacMiss
201100014.5770.000%
25500001.66718.874%
302500000.14386.662%
3510000000.01099.007%


ECM Summary

B1B2factorcurvesGHz-days
10.103
50000500000024917.03
250000400000005021.13


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-07ANONYMOUSv4_computers3111DF9BA0536A350.079


PRP results:
dateuseridcompidcofactorsres64
2017-10-02Oliver KruseGTX-3
16651654790151516911
0C7B77C6E4487CAF
2017-11-03ATHec2-1xh
16651654790151516911
0C7B77C6E4487CAF


CERT results:
No CERT results for M1674767


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
258
257
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
260
270
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Last modified: 2024-03-03T02:29:32+00:00