is 2 1064243 - 1
has 320370 decimal digits
takes 0.032 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
Actual26727.920268.6567 %300000100000000.03564.0972 %27.955869.9409 %
Target2600.144365.0000 %4500950000.00040.6354 %0.144765.2224 %
Difference+7+27.7759+3.6567 %+295500+9905000+0.0352+3.4619%+27.8111+4.7186 %

Known prime factors (3 factors, 129.8 bits, 0.01219278% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10642432128487721.0211
1
-112.626e-134.298e-88.746e-8
10642431306209288491236.92761368
23 × 3 × 2557
2008-07-16825571.104e-86.312e-61.119e-5
106424341477738483688101038492271.8131948696795923868
22 × 757 × 1931 × 2693 × 123757
2014-12-132693123757702.900.00040.0005

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-12-13alpertronManual testing300000100000001222271.8130.0368.166%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-07-16J FeitsmaManual testing??
36.927
12


ECM factoring results:
Total ECM effort:17.557 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002819.85
25000025000000447.710


Lucas-Lehmer results:
No L-L results for M1064243


PRP results:
dateuseridcompidcofactorsres64
2017-09-28Oliver KruseGTX-0
2128487
130620928849
4147773848368810103849
22E4FC4203C310F9
2017-10-05Oliver KruseManual testing
2128487
130620928849
4147773848368810103849
22E4FC4203C310F9
2017-10-16Oliver KruseThreadripper-PC
2128487
130620928849
4147773848368810103849
22E4FC4203C310F9
2017-12-31ATHec2-1xh
2128487
130620928849
4147773848368810103849
22E4FC4203C310F9


CERT results:
No CERT results for M1064243


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
TF factor-bounds graph:
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00