is 2 485609 - 1
has 146183 decimal digits
takes 0.006 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ecm on 2022-12-05, 0.0% done, ETC 2022-12-05
factored, 0 LL tests remaining
ResidueStatus
L-L388EA3213ED37861double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual268122.742572.0588%2000000010000000001.253410.6244%123.995975.0274%
Target2440.000056.8182%80002600000.000413.9722%0.000462.8516%
Difference+24+122.7425+15.2406%+19992000+999740000+1.2530-3.3478%+123.9955+12.1758%

Known prime factors (1 factor, 89.0 bits, 0.01833606% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4856096370549249939886469636253192789.042655934017897103067451
72 × 13386408528512307499
2022-12-244913386408528512307499474,493,0911.246e+102.326e+10

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-12-07Alex Kruppav4_computers1000004000000---0.005--2.204%
2002-06-23ANONYMOUSv4_computers327683276800---0.004--1.524%
2002-09-22ANONYMOUSv4_computers655366553600---0.007--2.193%
2003-04-27ANONYMOUSv4_computers13107213107200---0.014--2.989%
2010-11-23Rob_Deetwopc5000001000000---0.009--1.924%
2010-11-24Rob_Deetwopc10000002000000---0.018--2.528%
2012-10-10markrManual testing200000001000000000---1.253--10.624%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-12-12masserManual testing4000000960000009813--0.188
2022-12-18massercoffeelake800000021600000065--0.397
2022-12-24masserManual testing1600000049600000027P+12789.0420.853


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-04-27ANONYMOUSv4_computers21254--0.005--
2022-03-07LordJuliusManual testing254255--0.005--
2001-03-25ANONYMOUSv4_computers21256--0.020--
2002-01-22ANONYMOUSv4_computers21257--0.040--
2003-12-31ANONYMOUSv4_computers21258--0.079--
2016-02-23Mark RoseManual testing258260--0.237--
2011-11-09lycornasteroid260261--0.316--
2015-07-19NRManual testing261262--0.633--
2015-11-09Gordon SpenceManual testing262263--2.021--
2015-11-09Gordon SpenceManual testing263264--4.043--
2018-01-13BloodERazorManual testing264265--7.694--
2018-09-29BloodERazorManual testing265266--15.39--
2021-09-27YxinityManual testing266267--30.78--
2022-05-22Gordon SpenceManual testing267268--61.55--


ECM factoring results:
Total ECM effort:27.264 GHz-days
Estimated T-Level:28.155
DigitsB1CompleteFacMiss
201100044.0280.000%
25500006.1440.215%
302500000.63153.209%
3510000000.05195.024%
4030000000.00399.662%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002823.649
2500002500000036523.62


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-06-01MadPooManual testing388EA3213ED378610.006


PRP results:
dateuseridcompidcofactorsres64PRP
2022-12-24masserhwell
637054924993988646963625319
3383107A130314BBno


P-1 factor-bounds graph:
B1 = 20000000, B2 = 1000000000 (P-1 stage 2)
B1 = 16000000, B2 = 496000000 (P+1 stage 2)
B1 = 20000000 (P-1 stage 1)
B1 = 16000000 (P+1 stage 1)
B1 = 1000000, B2 = 2000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 500000, B2 = 1000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 100000, B2 = 4000000 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
258
257
256
255
254
250
260
270
280
290
2100
Last modified: 2022-12-24T02:01:38+00:00