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Old 2020-07-01, 15:42   #2414
chris2be8
 
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Sep 2009

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QUEUED AS f86_131m1

(86^131-1)/127296350506000474708670512286771610891902627605122671646543238329335622840049145135 from the Brent tables:
Code:
n: 206291417462093576497275239580773052795596055350565606087502662805051224044201602337850673455835775692863740037805407606265476824913591751307682500480113600344276700606001
skew: 41437836.858
c0: -5389519387337140565345516459794841317758000
c1: -143043284702103460455094028784037830
c2: 2239398228891059427583897507
c3: -889691908139885268641
c4: 3496913201934
c5: 95760
Y0: -1659129166378730128203133792666517
Y1: 1742363546744996502291193
# e 3.392e-13
type: gnfs
# msieve rating: skew 41437836.86, size 1.294e-16, alpha -8.708, combined = 3.376e-13 rroots = 3
rlim: 134000000
alim: 134000000
lpbr: 31
lpba: 31
mfbr: 62
mfba: 91
rlambda: 2.6
alambda: 3.5
Poly found by charybdis https://mersenneforum.org/showthread.php?t=25535&page=2 post 16

Sieve with 14e from 20M to 140M on the algebraic side.

Test sieving 10k ranges:
Code:
  Q  yield
 20M 23028
 80M 20522
134M 18438
160M 19843
220M 16237
Many thanks to charybdis for the poly, even though it took a while to test sieve them all enough to be sure I had found the best.

Chris

PS. I should be able to test sieve another number by tomorrow.

Last fiddled with by swellman on 2020-07-01 at 18:11
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