is 2 12159377 - 1
has 3660338 decimal digits
takes 4.681 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L6E75179953770ACFdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27278.649966.6667 %6000003065309109.63986.5246 %88.289768.8415 %
Target2684.902064.7059 %80000100000000.34642.9469 %5.248365.7460 %
Difference+4+73.7479+1.9608 %+520000+296530910+9.2935+3.5777%+83.0414+3.0956 %

Known prime factors (1 factor, 82.8 bits, 0.00068113% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1215937785420840155094014877890492582.821351255003258366012
22 × 3 × 13 × 67 × 163 × 2287 × 90150751
2021-12-15228790150751145,6222.74315.1212

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-02-04Stephan Gruppv4_computers1450002610000--0.1563.462%
2021-12-15lycornsupernova60000030653091022582.82111.119.226%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-03-27ANONYMOUSv4_computers212640.161
2013-08-20lycornManual testing2642650.307
2013-10-03NesowaManual testing2652660.615
2015-02-27ThaManual testing2662671.229
2015-07-08ThaManual testing2672682.458
2017-11-03ramgeisManual testing2682694.917
2021-06-27ZacHFXManual testing26927129.50
2021-10-22ANONYMOUSManual testing27127239.33


ECM factoring results:
Total ECM effort:1.171 GHz-days
Estimated T-Level:0.385
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021.171


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-03-05Stephan Gruppv4_computers6E75179953770ACF4.681
2001-06-17Stephan Gruppv4_computers6E75179953770ACF4.681
2004-06-12PaJaSoftv4_computers6E75179953770ACF4.681


PRP results:
dateuseridcompidcofactorsres64
2022-02-03Poaooffice-CN2
8542084015509401487789049
517A3F4242863451


CERT results:
dateuseridcompid
2022-02-03JacobZMServer


P-1 factor-bounds graph:
B1 = 600000, B2 = 306530910 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 145000, B2 = 2610000 (P-1 stage 2)
B1 = 145000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
272
271
269
268
267
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=0.38 ~= -15-bit
250
260
270
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290
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Last modified: 2024-03-13T02:15:48+00:00