is 2 1171967 - 1
has 352798 decimal digits
takes 0.036 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LA9B2A1F19620C733double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26725.353968.6567 %32768327680.00150.3903 %25.355368.7790 %
Target2600.131165.0000 %50001400000.00050.7985 %0.131665.2795 %
Difference+7+25.2228+3.6567 %+27768-107232+0.0009-0.4082 %+25.2237+3.4996 %

Known prime factors (1 factor, 91.4 bits, 0.00779812% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
117196732474536757869060279150833132891.3911385471466255835713768
23 × 3 × 13 × 31 × 223 × 1831 × 259411 × 1352383
2013-10-072594111352383427,902,0460.01420.0235

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-05-05Jossv4_computers10001000--4.45000e-50.039%
2002-08-17Jossv4_computers50005000--0.0000.283%
2002-08-17Jossv4_computers30003000--0.0000.167%
2002-08-17Jossv4_computers20002000--8.89000e-50.103%
2002-08-17Jossv4_computers40004000--0.0000.227%
2002-08-24Jossv4_computers60006000--0.0000.336%
2002-08-24Jossv4_computers3276832768--0.0011.189%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-04ANONYMOUSv4_computers212570.016
2003-05-11ANONYMOUSv4_computers212580.033
2022-03-07LordJuliusManual testing258260
2009-02-16Sturle Sundegolli.ifi2602610.131
2012-09-03AxelssonManual testing2612620.262
2012-10-13dbaughManual testing2622630.838


ECM factoring results:
Total ECM effort:18.916 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.038
50000500000028110.52
25000025000000448.355


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-10-03ANONYMOUSv4_computersA9B2A1F19620C7330.036


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-3
3247453675786906027915083313
A33760CECAC9AA96
2017-10-17Oliver KruseThreadripper-PC
3247453675786906027915083313
A33760CECAC9AA96
2018-01-06ATHec2-1xh
3247453675786906027915083313
A33760CECAC9AA96


CERT results:
No CERT results for M1171967


P-1 factor-bounds graph:
B1 = 32768 (P-1 stage 1)
B1 = 6000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 3000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
TF factor-bounds graph:
263
262
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
250
260
270
280
290
2100
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Last modified: 2024-02-29T14:28:04+00:00