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Old 2020-10-10, 15:53   #21
chris2be8
 
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Sep 2009

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QUEUED AS f57_142p1_2nd_try on 15e_small

(57^142+1)/9081974645657051345350287190506431773271039081219156713449250 from the Brent tables:
Code:
# Parms passed Fri Oct  9 18:04:10 2020
# SNFS difficulty is 250, GNFS equivalent is 183, GNFS difficulty is 189, degree 5
n: 237710967884698075579574222248730247413255418043979969554935038860240233536857295444883474293657157206451609002481208108212159704485766296390871734016981833659097138522843231790057716354009
type: snfs
#name: f57_142+1
c5: 3249
c0: 1
# Y0 = 57^28
Y0: 14604811593991510424147435018807634286571929892001
# Y1 = 1^0
Y1: -1
# msieve rating: skew 0.20, size 3.521e-17, alpha -0.034, combined = 1.123e-13 rroots = 1
skew: 0.2
rlim: 120000000
alim: 120000000
lpbr: 31
lpba: 31
mfbr: 62
mfba: 62
rlambda: 2.6
alambda: 2.6
I test sieved both degree 5 and degree 6 polys, degree 5 definitely has a higher yield.

Sieve with 15e from 40M to 150M on the rational side.

Test sieving 10k ranges:
Code:
  Q  Yield
 40M 21478
 80M 20254
120M 22329
160M 20465
200M 18839
I'll do the LA.

Chris

Last fiddled with by swellman on 2020-10-12 at 00:08 Reason: Moved to 15e_small queue
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