is 2 2646583 - 1
has 796701 decimal digits
takes 0.204 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
Actual26711.227367.1642 %2000000600000000.57797.6919 %11.805269.6899 %
Target2630.603065.0794 %1300010000000.00751.5744 %0.610565.6291 %
Difference+4+10.6242+2.0848 %+1987000+59000000+0.5704+6.1176%+11.1946+4.0607 %

Known prime factors (3 factors, 144.3 bits, 0.00545289% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
264658325036675191031.221473
11 × 43
-11431.081e-101.427e-62.507e-6
2646583874586218827131446.31416522932
22 × 3 × 19 × 72469
2014-02-0719724693.542e-60.00040.0008
26465831267205248358222798232166.78023940402556017
3 × 8779 × 909002641
2018-03-3187799090026415.58025.547310.359

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-07-04alpertronManual testing20000006000000012
skipped known factor: 2503667519
skipped known factor: 87458621882713
---10.620%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2014-02-07TJAOIManual testing??
46.314
14


ECM factoring results:
Total ECM effort:0.410 GHz-days
Estimated T-Level:0.769
DigitsB1CompleteFacMiss
20110000.15485.740%
25500000.01498.587%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.310
50000500000010.101


Lucas-Lehmer results:
No L-L results for M2646583


PRP results:
dateuseridcompidcofactorsres64
2017-10-21kkmrkkblmbrbkold
2503667519
87458621882713
3BA0C535B698D53D
2017-11-14Oliver KruseThreadripper-PC
2503667519
87458621882713
3BA0C535B698D53D
2018-04-01Oliver KruseGTX-7
2503667519
87458621882713
126720524835822279823
3BA0C535B698D53D


CERT results:
No CERT results for M2646583


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
109
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.77 ~= -14-bit
250
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270
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Last modified: 2024-03-03T02:29:32+00:00