is 2 3959869 - 1
has 1192040 decimal digits
takes 0.494 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L39FC6948520F484Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.503867.1642 %10000001194801301.34828.3557 %8.852069.9078 %
Target2640.898965.6250 %2600027500000.03152.3403 %0.930466.4295 %
Difference+3+6.6049+1.5392 %+974000+116730130+1.3167+6.0153%+7.9216+3.4783 %

Known prime factors (1 factor, 63.8 bits, 0.00161204% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3959869164473466279398200972063.8342076753880992
25 × 3 × 7 × 3090407561
2009-10-223230904075610.430130.45056.872

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-24Carsten Kossendeymother20000285000--0.0061.837%
2022-03-04JossManual testing9000090000--0.0141.475%
2022-03-22JossManual testing100000100000--0.0161.558%
2022-05-26JossManual testing100000119480130--1.1948.081%
2022-06-09JossManual testing100000207712890--2.0648.659%
2022-09-20JossManual testing1000000119480130--1.34810.683%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-12-25Architects Cubedm1_tt2602610.039


ECM factoring results:
Total ECM effort:0.355 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.355


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-01-12ANONYMOUSv4_computers39FC6948520F484C0.494


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
16447346627939820097
EAAB03889397AF91
2018-01-01Oliver KruseGTX-0
16447346627939820097
EAAB03889397AF91


CERT results:
No CERT results for M3959869


P-1 factor-bounds graph:
B1 = 100000, B2 = 207712890 (P-1 stage 2)
B1 = 1000000, B2 = 119480130 (P-1 stage 2)
B1 = 100000, B2 = 119480130 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 285000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
261
this exponent TF target: 64
TF double-checked to: 67
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00