is 2 2133463 - 1
has 642237 decimal digits
takes 0.140 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
Actual26713.927667.1642 %500000150000000.12305.1630 %14.050568.8595 %
Target2620.288064.5161 %100007500000.00481.4866 %0.292865.0436 %
Difference+5+13.6396+2.6481 %+490000+14250000+0.1182+3.6764%+13.7578+3.8159 %

Known prime factors (2 factors, 57.2 bits, 0.00267937% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
213346321334631824.3475
5
-151.049e-121.161e-71.940e-7
213346375652597991032.8171773
32 × 197
2008-07-1491973.711e-101.835e-61.925e-6

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-22alpertronManual testing5000001500000012
skipped known factor: 21334631
skipped known factor: 7565259799
---8.243%


Trial Factoring results:
5758596061626364656667
No TF results for M2133463


ECM factoring results:
Total ECM effort:9.220 GHz-days
Estimated T-Level:21.822
DigitsB1CompleteFacMiss
20110003.9201.984%
25500000.36469.461%
302500000.02397.711%
3510000000.00199.891%


ECM Summary

B1B2factorcurvesGHz-days
10.062
500005000000252.132
50000651221770.671
50000674924170.682
50000700000070.695
500007050000504.979


Lucas-Lehmer results:
No L-L results for M2133463


PRP results:
dateuseridcompidcofactorsres64
2017-10-08Oliver KruseGTX-2
21334631
7565259799
55A1BDA65AC07C11
2017-11-18kkmrkkblmbrbkc4.xlarge
21334631
7565259799
55A1BDA65AC07C11


CERT results:
No CERT results for M2133463


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: 62
TF double-checked to: 67
ECM T-Level=21.82 ~= 56-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00