is 2 14479867 - 1
has 4358875 decimal digits
takes 6.934 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L68FA593CB6609417double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273132.103767.1233%1600000162097845062.37578.5401%194.479469.9310%
Target2698.245065.2174%10000024000000.15652.9250%8.401566.2348%
Difference+4+123.8587+1.9059%+1500000+1618578450+62.2193+5.6151%+186.0780+3.6962%

Known prime factors (1 factor, 134.2 bits, 0.00092660% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
144798672450460088053086885986930927476445834348141134.170846161117382185515235371612003220
22 × 5 × 27031 × 27271 × 29179 × 116993 × 313133 × 53690911		2023-01-30313133536909119.691e+92.23683.7938

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-22ANONYMOUSv4_computers1650002392500---0.199--2.016%
2023-01-01nordisweet16_30.8b1416000001600000---1.111--2.189%
2023-01-30nordisweet16_30.8b141600000162097845041134.17062.3813.87124.88.540%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-10Net_Forcev4_computers21256--0.001--
2000-09-08Net_Forcev4_computers21257--0.001--
2000-09-23Net_Forcev4_computers21258--0.003--
2000-10-22lalerav4_computers21260--0.011--
2000-11-15ANONYMOUSv4_computers21264--0.246--
2000-11-25ANONYMOUSv4_computers21265--0.504--
2014-08-19NesowaManual testing265266--0.516--
2015-10-16NesowaManual testing266267--1.032--
2018-03-14ramgeisManual testing267268--2.064--
2018-03-14ramgeisManual testing268269--4.129--
2021-08-09SRBaseManual testing269270--8.257--
2021-09-02SRBaseManual testing270271--16.51--
2021-10-15-Anonymous-Manual testing271272--33.03--
2021-12-08-Anonymous-Manual testing272273--66.06--


ECM factoring results:
Total ECM effort:0.728 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-02-10ANONYMOUSv4_computers1589C82092CA53AD6.934
2003-01-25ANONYMOUSv4_computers68FA593CB66094176.934
2005-09-22ANONYMOUSv4_computers68FA593CB66094176.934


PRP results:
dateuseridcompidcofactorsres64PRP
2023-02-01DobriManual testing
24504600880530868859869309274764458343481
AE13C772E3AE4E30no


P-1 factor-bounds graph:
B1 = 1600000, B2 = 1620978450 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 165000, B2 = 2392500 (P-1 stage 2)
B1 = 165000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
109
1010
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
260
258
257
256
this exponent TF target: 69
TF double-checked to: 67.7
ECM T-Level=0.19 ~= -16-bit
250
260
270
280
290
2100
2110
2120
2130
2140
Last modified: 2023-03-25T13:08:14+00:00