mersenneforum.org  

Go Back   mersenneforum.org > Factoring Projects > CADO-NFS

Reply
 
Thread Tools
Old 2022-01-13, 18:55   #89
bur
 
bur's Avatar
 
Aug 2020
79*6581e-4;3*2539e-3

503 Posts
Default

Thanks, the c167 took 12 days of sieving, the c170 had enough relations already after 15 days, much faster than I anticipated also from c150 and c160 jobs on that machine.


Anyway, I tried again with 235M rels and 166.7M uniques which resulted in a matrix:

Code:
matrix is 10297670 x 10297895 (4105.4 MB) with weight 1089257460 (105.77/col)
sparse part has weight 973222523 (94.51/col)
linear algebra completed 309078 of 10297895 dimensions (3.0%, ETA 28h36m)
The size is ok, I think? If all will go fine for the rest this took a total of 180 core-days on an i9-10900k. About 15 core-days for polysearch (could have been less, I was just trying different parameters), 150 for sieving and 15 for LA.

I had anticipated something like 3-4 weeks WCT for this, now it only took 2.5 weeks.
bur is offline   Reply With Quote
Old 2022-01-27, 06:47   #90
bur
 
bur's Avatar
 
Aug 2020
79*6581e-4;3*2539e-3

503 Posts
Default

I am currently testing the optimal q-min for the c170, it seems it's quite large as well. The q-range of the original run was 15M-84M yielding 166.4M uniques. In the q-range 24M-93M I got 169.0M uniques.

I also have another c165 to factor, should I just use the same parameters as for the c167 discussed here before?
bur is offline   Reply With Quote
Old 2022-02-07, 18:33   #91
firejuggler
 
firejuggler's Avatar
 
"Vincent"
Apr 2010
Over the rainbow

1011000101102 Posts
Default

Are the parametters for polyselect of interest or only the sieving LA and the rest?
firejuggler is offline   Reply With Quote
Old 2022-02-07, 21:47   #92
firejuggler
 
firejuggler's Avatar
 
"Vincent"
Apr 2010
Over the rainbow

1011000101102 Posts
Default

ok, I tried a polyselect on the same range, but with different tasks.polyselect.P. on a C165
(7^178*178^7-1)/129
with
Code:
tasks.polyselect.P = 300e3
tasks.polyselect.admin=1.99e6
tasks.polyselect.admax = 2e6
tasks.polyselect.adrange = 1e3
tasks.polyselect.incr = 250
tasks.polyselect.nq = 3125
tasks.polyselect.nrkeep = 6
tasks.polyselect.ropteffort=10
tasks.polyselect.sopteffort=200
tasks.polyselect.P=300e3
Code:
R0: -35809166954067912357846660220632
R1: 13463319667006865269
A0: -2219834428349037570991732730801168691845
A1: -692194239737244432596138760691083
A2: 488342217850668125365542693
A3: -31512898162007566885
A4: -45218104446796
A5: 1994500
skew 3796573.56, size 3.067e-016, alpha -6.046, combined = 5.428e-013 rroots = 3
with P=3e6
Code:
R0: -35750679366989574211105475195855
R1: 633662203321820819083499
A0: 82290745085368826347864212268994400888
A1: -78146700994698691661021326578602
A2: -288482486297396525055747957
A3: -4358229227643201247
A4: 5932124350875
A5: 17995500
skew 1393695.22, size 3.034e-016, alpha -6.080, combined = 5.528e-013 rroots = 3
and P=30e6
Code:
R0: -35809200555754954673312861203782
R1: 31581039660216687989269
A0: 11327319509762555016982123133746333048
A1: 286465213321329043975159328886322
A2: -306077442964448660296883751
A3: -265544123343226564667
A4: 1365778877333728
A5: -4564560000
skew 379204.77, size 1.848e-016, alpha -7.335, combined = 4.089e-013 rroots = 3

clearly the P=30e6 isn't good for that short range.

Last fiddled with by firejuggler on 2022-02-07 at 21:54
firejuggler is offline   Reply With Quote
Old 2022-02-07, 22:16   #93
VBCurtis
 
VBCurtis's Avatar
 
"Curtis"
Feb 2005
Riverside, CA

5,279 Posts
Default

Quote:
Originally Posted by firejuggler View Post
ok, I tried a polyselect on the same range, but with different tasks.polyselect.P. on a C165
(7^178*178^7-1)/129
with
Code:
tasks.polyselect.P = 300e3
tasks.polyselect.admin=1.99e6
tasks.polyselect.admax = 2e6
tasks.polyselect.adrange = 1e3
tasks.polyselect.incr = 250
tasks.polyselect.nq = 3125
tasks.polyselect.nrkeep = 6
tasks.polyselect.ropteffort=10
tasks.polyselect.sopteffort=200
tasks.polyselect.P=300e3
nq=3125 is highly unlikely to yield a good poly. Use 15625, or if you'd like to experiment 78125.
I'd turn sopteffort way down, too- something like 5 to 10 should be best for C160-170. Better to search over more a5 values than to look *really* hard at a few. Perhaps you chose these values because you wanted to compare various P values- but as it is poly select is such a needle-in-haystack game that using poly score as a measure of setting effectiveness is hazy, at best.
If you want to compare settings, I suggest you look at the lognorm score posted after stage 1; that's giving you a measure of the quality of the worst poly found before root-opt. It's possible that some settings yield better top polys but worse "worst" polys, but I haven't found such settings yet.

Last fiddled with by VBCurtis on 2022-02-07 at 22:16
VBCurtis is offline   Reply With Quote
Old 2022-02-07, 22:20   #94
charybdis
 
charybdis's Avatar
 
Apr 2020

2BE16 Posts
Default

incr=250 is not a good choice. Better values to try would be 60, 120, 210, 420; you want the leading coefficient to have lots of small prime factors.
charybdis is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Some CADO-NFS Work At Around 175-180 Decimal Digits EdH CADO-NFS 127 2020-10-07 01:47
Sigma parameter in ecm storm5510 Information & Answers 4 2019-11-30 21:32
PrimeNet error 7: Invalid parameter ksteczk PrimeNet 6 2018-03-26 15:11
Parameter Underestimation R.D. Silverman Cunningham Tables 14 2010-09-29 19:56
ECM Work and Parameter Choices R.D. Silverman Cunningham Tables 11 2006-03-06 18:46

All times are UTC. The time now is 18:01.


Fri May 20 18:01:20 UTC 2022 up 36 days, 16:02, 0 users, load averages: 1.35, 1.50, 1.48

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.

≠ ± ∓ ÷ × · − √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ ² ³ °
∠ ∟ ° ≅ ~ ‖ ⟂ ⫛
≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘ ∏ ∐ ∑ ∧ ∨ ∩ ∪ ⨀ ⊕ ⊗ 𝖕 𝖖 𝖗 ⊲ ⊳
∅ ∖ ∁ ↦ ↣ ∩ ∪ ⊆ ⊂ ⊄ ⊊ ⊇ ⊃ ⊅ ⊋ ⊖ ∈ ∉ ∋ ∌ ℕ ℤ ℚ ℝ ℂ ℵ ℶ ℷ ℸ 𝓟
¬ ∨ ∧ ⊕ → ← ⇒ ⇐ ⇔ ∀ ∃ ∄ ∴ ∵ ⊤ ⊥ ⊢ ⊨ ⫤ ⊣ … ⋯ ⋮ ⋰ ⋱
∫ ∬ ∭ ∮ ∯ ∰ ∇ ∆ δ ∂ ℱ ℒ ℓ
𝛢𝛼 𝛣𝛽 𝛤𝛾 𝛥𝛿 𝛦𝜀𝜖 𝛧𝜁 𝛨𝜂 𝛩𝜃𝜗 𝛪𝜄 𝛫𝜅 𝛬𝜆 𝛭𝜇 𝛮𝜈 𝛯𝜉 𝛰𝜊 𝛱𝜋 𝛲𝜌 𝛴𝜎𝜍 𝛵𝜏 𝛶𝜐 𝛷𝜙𝜑 𝛸𝜒 𝛹𝜓 𝛺𝜔