is 2 2667383 - 1
has 802963 decimal digits
takes 0.206 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
Actual26711.139767.1642 %2000000600000000.57797.6981 %11.717669.6919 %
Target2630.598365.0794 %1300011000000.00811.6208 %0.606465.6454 %
Difference+4+10.5414+2.0848 %+1987000+58900000+0.5698+6.0773%+11.1112+4.0465 %

Known prime factors (3 factors, 101.3 bits, 0.00379626% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2667383469459409928.80688
23 × 11
-8111.366e-119.142e-71.823e-6
2667383106962058311133.3162005
5 × 401
2008-09-0754016.152e-102.976e-64.565e-6
26673836048824429111239.138113385
3 × 5 × 7559
2008-09-30575594.234e-84.665e-58.615e-5

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-07-04alpertronManual testing20000006000000012
skipped known factor: 469459409
skipped known factor: 10696205831
skipped known factor: 604882442911
---10.628%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-07Will EdgingtonManual testing??
33.316
11
2008-09-30markrManual testing??
39.138
12


ECM factoring results:
Total ECM effort:0.302 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.302


Lucas-Lehmer results:
No L-L results for M2667383


PRP results:
dateuseridcompidcofactorsres64
2017-10-18Oliver KruseGTX-3
469459409
10696205831
604882442911
FA9BB9FB23CA024C
2017-12-03Chang Chia-Tcheex01
469459409
10696205831
604882442911
FA9BB9FB23CA024C


CERT results:
No CERT results for M2667383


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00