is 2 8597143 - 1
has 2587998 decimal digits
takes 2.245 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF04AA960D4707133double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272111.238566.6667 %156000062760555013.50467.8145 %124.743169.2715 %
Target2686.933164.7059 %5500060000000.14352.2925 %7.076665.5150 %
Difference+4+104.3054+1.9608 %+1505000+621605550+13.3611+5.5219%+117.6665+3.7565 %

Known prime factors (1 factor, 113.5 bits, 0.00132054% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
85971431498072030558086076380703682765773735113.529871261551981911942363122076
22 × 67 × 394813 × 413167 × 857711 × 23235697
2022-01-18857711232356972.191e+100.78630.8952

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-04-29ANONYMOUSv4_computers90000720000--0.0472.206%
2012-11-03NesowaWork10000018250006--0.0732.854%
2022-01-18firejugglerMaison1560000627605550235113.52915.0810.722%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-10-18ANONYMOUSv4_computers212620.036
1998-11-14ANONYMOUSv4_computers212630.114
1999-12-08James Hintzv4_computers212640.228
2013-11-03David CampeauManual testing2642650.435
2015-05-25VictordeHollanderManual testing2652660.869
2016-01-29snme2pm1Manual testing2662671.738
2018-04-05monstManual testing2672683.477
2019-11-29TJAOIManual testing2682696.954
2021-08-20SRBaseManual testing26927013.91
2021-08-27SRBaseManual testing27027127.81
2021-10-05SRBaseManual testing27127255.63


ECM factoring results:
Total ECM effort:2.382 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000062.382


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-05-20ANONYMOUSv4_computersF04AA960D47071332.245
2002-11-16ANONYMOUSv4_computersF04AA960D47071332.245
2003-01-25ANONYMOUSv4_computersF04AA960D47071332.245


PRP results:
dateuseridcompidcofactorsres64
2022-01-25Massimo Cappelli (ik5pwa)maxlinux_8
14980720305580860763807036827657737
58FE46F60F6394B9


CERT results:
dateuseridcompid
2022-01-25curtiscwd-210--17l


P-1 factor-bounds graph:
B1 = 1560000, B2 = 627605550 (P-1 stage 2)
B1 = 1560000 (P-1 stage 1)
B1 = 100000, B2 = 1825000 (P-1 stage 2)
B1 = 90000, B2 = 720000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
290
2100
2110
2120
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Last modified: 2024-03-13T02:15:48+00:00