is 2 1376161 - 1
has 414266 decimal digits
takes 0.053 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LBC4E8CC95A21F634double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26721.591968.6567 %500000150000000.07144.8970 %21.663370.1916 %
Target2600.111665.0000 %55003250000.00131.1701 %0.112965.4095 %
Difference+7+21.4803+3.6567 %+494500+14675000+0.0701+3.7270%+21.5504+4.7821 %

Known prime factors (1 factor, 59.1 bits, 0.00429683% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13761616313946267372664791859.131229404345399
33 × 2953 × 2877229
2007-12-31295328772290.05580.00880.0162

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-21Team Prime Ribv4_computers15000228750--0.0012.331%
2003-09-21Xyzzyv4_computers15000228750--0.0012.331%
2016-03-17alpertronManual testing5000001500000012
skipped known factor: 631394626737266479
---9.391%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-03ANONYMOUSv4_computers212570.014
2003-07-06ANONYMOUSv4_computers212580.028


ECM factoring results:
Total ECM effort:29.524 GHz-days
Estimated T-Level:25.703
DigitsB1CompleteFacMiss
201100014.6150.000%
25500001.64719.258%
302500000.14186.886%
3510000000.01099.022%


ECM Summary

B1B2factorcurvesGHz-days
10.042
50000500000025013.67
250000350000005015.81


Lucas-Lehmer results:
No L-L results for M1376161


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-1
631394626737266479
80B17131F7803651
2017-10-26kkmrkkblmbrbkc4.xlarge
631394626737266479
80B17131F7803651


CERT results:
No CERT results for M1376161


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 228750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
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Last modified: 2024-02-29T14:28:04+00:00