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Old 2022-01-07, 14:18   #3
nivek000
 
Dec 2021

1710 Posts
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I am running the factor command on the C214:

Code:
9204214625221874710952946935076263878608726889174004840754589809679987461484965033357036848408384671559545992781188531318866340573729054722277805831939611797303471658749775441007571889786142040525120939985881393299
This leads to a C160 SNFS:

Code:
01/07/22 02:23:41, nfs: commencing nfs on c160: 1094978880991933841557716588685966958370702537417059147514661217327507272995782570163478397553503222964719677999983911694855297094453016882804532233693251575823
01/07/22 02:23:41, nfs: input divides 43^131 - 42^131
01/07/22 02:23:41, nfs: using supplied cofactor: 1094978880991933841557716588685966958370702537417059147514661217327507272995782570163478397553503222964719677999983911694855297094453016882804532233693251575823
01/07/22 02:23:41, nfs: commencing snfs on c160: 1094978880991933841557716588685966958370702537417059147514661217327507272995782570163478397553503222964719677999983911694855297094453016882804532233693251575823
01/07/22 02:23:41, gen: best 3 polynomials:
n: 1094978880991933841557716588685966958370702537417059147514661217327507272995782570163478397553503222964719677999983911694855297094453016882804532233693251575823
# 43^131-42^131, difficulty: 213.98, anorm: -8.04e+28, rnorm: 7.89e+48
# scaled difficulty: 217.98, suggest sieving rational side
# size = 6.194e-15, alpha = 0.995, combined = 3.414e-12, rroots = 1
type: snfs
size: 213
skew: 0.9953
c5: 43
c0: -42
Y1: -1601332619247764283850260201342556799238144
Y0: 2952431600795587633717359131697109546569049
n: 1094978880991933841557716588685966958370702537417059147514661217327507272995782570163478397553503222964719677999983911694855297094453016882804532233693251575823
# 43^131-42^131, difficulty: 218.86, anorm: -3.54e+35, rnorm: 2.01e+42
# scaled difficulty: 220.21, suggest sieving rational side
# size = 6.444e-11, alpha = 0.798, combined = 2.431e-12, rroots = 2
type: snfs
size: 218
skew: 1.0039
c6: 42
c0: -43
Y1: -514617308132852400700537649353457664
Y0: 863586854220408743801513785592407849
n: 1094978880991933841557716588685966958370702537417059147514661217327507272995782570163478397553503222964719677999983911694855297094453016882804532233693251575823
# 43^131-42^131, difficulty: 233.50, anorm: -3.01e+33, rnorm: 3.35e+50
# scaled difficulty: 236.91, suggest sieving rational side
# size = 8.786e-17, alpha = -1.236, combined = 2.748e-13, rroots = 1
type: snfs
size: 233
skew: 1.0190
c5: 3111696
c0: -3418801
Y1: -67255970008406099921710928456387385568002048
Y0: 126954558834210268249846442662975710502469107
01/07/22 02:23:46, test: fb generation took 3.9993 seconds
01/07/22 02:23:46, test: commencing test sieving of polynomial 0 on the rational side over range 27800000-27801000
skew: 1.1247
c5: 43
c0: -42
Y1: -1601332619247764283850260201342556799238144
Y0: 2952431600795587633717359131697109546569049
rlim: 27800000
alim: 27800000
mfbr: 58
mfba: 58
lpbr: 29
lpba: 29
rlambda: 2.60
alambda: 2.60
01/07/22 02:23:46, test: estimated total sieving time = 11574 days 1h 46m 39s (with 40 threads)
01/07/22 02:23:52, test: fb generation took 6.5770 seconds
01/07/22 02:23:52, test: commencing test sieving of polynomial 1 on the rational side over range 29200000-29201000
skew: 1.0742
c6: 42
c0: -43
Y1: -514617308132852400700537649353457664
Y0: 863586854220408743801513785592407849
rlim: 29200000
alim: 29200000
mfbr: 58
mfba: 58
lpbr: 29
lpba: 29
rlambda: 2.60
alambda: 2.60
01/07/22 02:23:53, test: estimated total sieving time = 11574 days 1h 46m 39s (with 40 threads)
01/07/22 02:23:59, test: fb generation took 6.2644 seconds
01/07/22 02:23:59, test: commencing test sieving of polynomial 2 on the rational side over range 43600000-43601000
skew: 1.1311
c5: 3111696
c0: -3418801
Y1: -67255970008406099921710928456387385568002048
Y0: 126954558834210268249846442662975710502469107
rlim: 43600000
alim: 43600000
mfbr: 60
mfba: 60
lpbr: 30
lpba: 30
rlambda: 2.60
alambda: 2.60
01/07/22 02:23:59, test: estimated total sieving time = 11574 days 1h 46m 39s (with 40 threads)
01/07/22 02:23:59, gen: selected polynomial:
n: 1094978880991933841557716588685966958370702537417059147514661217327507272995782570163478397553503222964719677999983911694855297094453016882804532233693251575823
# 43^131-42^131, difficulty: 213.98, anorm: -8.04e+28, rnorm: 7.89e+48
# scaled difficulty: 217.98, suggest sieving rational side
# size = 6.194e-15, alpha = 0.995, combined = 3.414e-12, rroots = 1
type: snfs
size: 213
skew: 1.1247
c5: 43
c0: -42
Y1: -1601332619247764283850260201342556799238144
Y0: 2952431600795587633717359131697109546569049
01/07/22 02:23:59, nfs: commencing lattice sieving with 40 threads
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