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Old 2020-11-17, 16:54   #46
chris2be8
 
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Sep 2009

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QUEUED AS f28_173p1

(28^173+1)/302830318008957566210407099069397706796228194779381147147934606233178157091 from the Brent tables.
Code:
# Built Mon Nov 16 17:44:22 2020
# Estimated SNFS difficulty 252, GNFS equivalent 181, GNFS difficulty 176, degree 6
n: 75359857677567477775591199572089983712833461592417886245636285242856904975006218101699473583835659096579121846882256167753696129631926577837465352224445970383870242959089401739
type: snfs
# c6 1:
c6: 1
# c0 28: 2 2 7
c0: 28
# Y0 = 28^29
Y0: 928074647171094496152036391094208962756608
# Y1 = 1^0
Y1: 1
# msieve rating: skew 1.74, size 1.424e-12, alpha 2.274, combined = 1.543e-13 rroots = 0
skew: 1.74
rlim: 120000000
alim: 120000000
lpbr: 31
lpba: 31
mfbr: 62
mfba: 62
rlambda: 2.6
alambda: 2.6
lss: 0
Sieve on 15e_small from 40M to 160M on the algebraic side.

Test sieving 10k ranges:
Code:
  Q  Yield
 40M 25248
 80M 17449
120M 19572
160M 15447
200M 14657
I also test sieved on the rational side, that's slightly slower.

It could have been done as a GNFS job, but poly selection would probably take longer than it would save on sieving.

I'll do the LA.

Chris

Last fiddled with by swellman on 2020-11-17 at 18:50
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