is 2 2306639 - 1
has 694368 decimal digits
takes 0.156 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
Actual26712.881967.1642 %50000005050000003.158210.9731 %16.040170.7673 %
Target2620.266364.5161 %1200010000000.00641.7385 %0.272865.1330 %
Difference+5+12.6156+2.6481 %+4988000+504000000+3.1518+9.2346%+15.7673+5.6343 %

Known prime factors (1 factor, 52.1 bits, 0.00225734% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
230663947233341868260891652.0691023856396
22 × 255964099
-42559640990.00051.36612.5514

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-02-19alpertronManual testing5000001500000012---8.314%
2021-04-05ViliamF35000000505000000
skipped known factor: 4723334186826089
---15.463%


Trial Factoring results:
5758596061626364656667
No TF results for M2306639


ECM factoring results:
Total ECM effort:7.687 GHz-days
Estimated T-Level:21.451
DigitsB1CompleteFacMiss
20110003.1154.436%
25500000.29074.804%
302500000.01898.171%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.273
50000663081770.704
50000697180180.824
500007000000505.161
50000704944870.725


Lucas-Lehmer results:
No L-L results for M2306639


PRP results:
dateuseridcompidcofactorsres64
2017-10-11Oliver KruseGTX-2
4723334186826089
DF07C2163ED40E14
2017-11-22kkmrkkblmbrbkc4.xlarge
4723334186826089
DF07C2163ED40E14


CERT results:
No CERT results for M2306639


P-1 factor-bounds graph:
B1 = 5000000, B2 = 505000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (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: 62
TF double-checked to: 67
ECM T-Level=21.45 ~= 55-bit
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Last modified: 2024-03-13T02:15:48+00:00