is 2 13714843 - 1
has 4128580 decimal digits
takes 6.085 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L21F365E9813154B7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27269.729866.6667%1600000165677967059.04479.2152%128.774569.7384%
Target2698.704965.2174%90000176000000.67162.7890%9.376666.1875%
Difference+3+61.0249+1.4493%+1510000+1639179670+58.3730+6.4262%+119.3979+3.5509%

Known prime factors (1 factor, 130.9 bits, 0.00095418% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13714843247718357487896212148405448046193552824140130.86490310314703528218350150070272840
23 × 5 × 7 × 11 × 31 × 2467 × 22669 × 75029 × 152833 × 1474949453
2023-06-2815283314749494531.248e+1051.79196.558

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-02-24ANONYMOUSv4_computers1650003712500---0.230--2.493%
2023-03-09nordisweet16_30.8b1416000001600000---1.029--2.416%
2023-06-28nordisweet16_30.8b141600000165677967040130.86459.0412.17118.19.215%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-06-28lalerav4_computers21256--0.001--
2000-07-03ANONYMOUSv4_computers21265--0.532--
2000-10-28ANONYMOUSv4_computers21265--0.532--
2014-07-02NesowaManual testing265266--0.545--
2015-08-16NesowaManual testing266267--1.090--
2017-12-23-Anonymous-Manual testing267268--2.179--
2018-01-14ramgeisManual testing268269--4.359--
2021-08-08SRBaseManual testing269270--8.718--
2021-09-04SRBaseManual testing270271--17.44--
2021-09-24Jon PaceManual testing271272--34.87--


ECM factoring results:
Total ECM effort:0.675 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.675


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-03ANONYMOUSv4_computers21F365E9813154B76.085
2005-03-20ANONYMOUSv4_computers21F365E9813154B76.085


PRP results:
dateuseridcompidcofactorsres64PRP
2023-06-29Naegi Makoto5950X
2477183574878962121484054480461935528241
B150B4C51A9E9183no


P-1 factor-bounds graph:
B1 = 1600000, B2 = 1656779670 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 165000, B2 = 3712500 (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:
272
271
270
269
268
267
266
265
256
this exponent TF target: 69
TF double-checked to: 67.9
ECM T-Level=0.19 ~= -16-bit
250
260
270
280
290
2100
2110
2120
2130
2140
Last modified: 2023-07-11T14:45:05+00:00