is 2 13820293 - 1
has 4160323 decimal digits
takes 6.132 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L19D7CBC7084BB815double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.150064.1791 %50000032070885011.54529.9990 %13.695367.7608 %
Target2698.638565.2174 %90000110000000.44032.7922 %9.078866.1886 %
Difference-2-6.4885-1.0383 %+410000+309708850+11.1049+7.2068%+4.6164+1.5723 %

Known prime factors (1 factor, 85.9 bits, 0.00062148% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13820293717294726942127583708628412685.8912595077857401892940
22 × 5 × 7 × 11 × 71 × 1889 × 18097 × 694277
2016-08-0918097694277944,9550.03530.0455

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-11-24ANONYMOUSv4_computers200000200000--0.1291.412%
2016-08-09ThaRiet-Ubuntu30000060000001222685.8910.4244.192%
2023-10-25nordisweet16_30.8b14500000500000--0.3472.136%
2023-11-03nordisweet16_30.8b14500000320708850
skipped known factor: 71729472694212758370862841
--14.828.449%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-07-17lalerav4_computers212560.001
2000-08-01ANONYMOUSv4_computers212650.270
2014-07-08NesowaManual testing2652660.541
2015-08-29NesowaManual testing2662671.081


ECM factoring results:
No ECM results for M13820293


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-04-14ANONYMOUSv4_computers19D7CBC7084BB8156.132
2005-11-27ANONYMOUSv4_computers19D7CBC7084BB8156.132


PRP results:
dateuseridcompidcofactorsres64
2022-10-16barkingcat1900
71729472694212758370862841
683592EE22DD0F3B


CERT results:
dateuseridcompid
2022-10-16curtiscwcm220--03l


P-1 factor-bounds graph:
B1 = 500000, B2 = 320708850 (P-1 stage 2)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
256
this exponent TF target: 69
TF double-checked to: 67
250
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270
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290
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Last modified: 2024-03-13T02:15:48+00:00