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Search: Posts Made By: VBCurtis
Forum: CADO-NFS 2022-11-09, 00:25
Replies: 96
Views: 22,586
Posted By VBCurtis
I spent some human-time test-sieving with CADO on...

I spent some human-time test-sieving with CADO on a C161, and then ran the job entirely with CADO. My fastest params in testing were 31/32LP, 60/88 MFB, lambdas of 1.93 and 2.75. Lims were 36/30M, Q...
Forum: CADO-NFS 2022-07-07, 14:15
Replies: 96
Views: 22,586
Posted By VBCurtis
I haven't done any work on large params in...

I haven't done any work on large params in months- I bought a Ryzen about a month ago, and have been re-tuning for it starting from the bottom and have only made it to C140 or so.
I'm on vacation...
Forum: CADO-NFS 2022-02-07, 22:16
Replies: 96
Views: 22,586
Posted By VBCurtis
nq=3125 is highly unlikely to yield a good poly. ...

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...
Forum: CADO-NFS 2022-01-12, 23:11
Replies: 96
Views: 22,586
Posted By VBCurtis
Correct, msieve has no filtering equivalent to...

Correct, msieve has no filtering equivalent to required_excess. We use target_density as a proxy.

Yes, you can estimate based on how early the filtering failed; but it's easier to just try...
Forum: CADO-NFS 2022-01-10, 17:37
Replies: 96
Views: 22,586
Posted By VBCurtis
Random properties of the poly. No way to predict...

Random properties of the poly. No way to predict ahead of time what uniques ratio will be. However, as you note Q-range does influence uniques ratio. I am happy if I'm above 70% on a job.

I...
Forum: CADO-NFS 2022-01-05, 19:16
Replies: 96
Views: 22,586
Posted By VBCurtis
Definitely *not* enough evidence! In fact, my...

Definitely *not* enough evidence! In fact, my target was 8 until your analysis of that C167. Now I say "7 to 8", and maybe I should say "7" pending further testing like the happily-detailed one you...
Forum: CADO-NFS 2022-01-05, 17:01
Replies: 96
Views: 22,586
Posted By VBCurtis
165 digits uses I=14, while 170 is using A=28....

165 digits uses I=14, while 170 is using A=28. With a larger siever, we expect to need a shorter Q-range.
I set Q-min as low as possible such that we expect the Q-max to Q-min ratio to be between 7...
Forum: CADO-NFS 2021-10-07, 17:38
Replies: 96
Views: 22,586
Posted By VBCurtis
I believe a too-small dimension setting will let...

I believe a too-small dimension setting will let some duplicate relations sneak through; a reasonable price to pay to control memory use on really big problems. For these normal-sized jobs, I set dim...
Forum: CADO-NFS 2021-09-23, 18:24
Replies: 96
Views: 22,586
Posted By VBCurtis
I don't think we can answer that until we see the...

I don't think we can answer that until we see the data from 15 vs 12 vs 10. I'm expecting 50-60% duplicates in 12-15, and worse in 10-12.

If you do wish to take more data, I think Q=8-10M would...
Forum: CADO-NFS 2021-09-23, 16:40
Replies: 96
Views: 22,586
Posted By VBCurtis
I'd like to see 10-100M and 10-105M. The CADO...

I'd like to see 10-100M and 10-105M. The CADO group reports that duplicate ratio rises meaningfully when q-max is beyond 8 * q-min. Your data is all within that ratio, but you started sieving at 10M...
Forum: CADO-NFS 2021-09-07, 14:22
Replies: 96
Views: 22,586
Posted By VBCurtis
More poly select doesn't interfere with anything...

More poly select doesn't interfere with anything else- perhaps 2x more poly select saves you 5% of sieve time; that's around half a digit of difficulty. I have poly select calibrated to take about 5%...
Forum: CADO-NFS 2021-09-02, 21:28
Replies: 96
Views: 22,586
Posted By VBCurtis
I leave all CADO processes the default...

I leave all CADO processes the default two-threaded unless I run low on memory. But number of threads per process is separate from number of total threads used- CADO defaults to the total number of...
Forum: CADO-NFS 2021-09-02, 15:33
Replies: 96
Views: 22,586
Posted By VBCurtis
Each polyselect process runs two-threaded, with...

Each polyselect process runs two-threaded, with each thread working independently. Using adrange of 8 * incr means each thread gets four leading coefficients to search. It is unavoidable that one set...
Forum: CADO-NFS 2021-06-16, 22:11
Replies: 96
Views: 22,586
Posted By VBCurtis
Yes, exactly. There's no harm in CADO doing...

Yes, exactly. There's no harm in CADO doing multiple filtering runs, so you could use 144M or 143M too if you're curious about how far it can be pushed. The "required_excess" setting is supposed to...
Forum: CADO-NFS 2021-06-16, 16:28
Replies: 96
Views: 22,586
Posted By VBCurtis
73% unique is unusually high; I would expect most...

73% unique is unusually high; I would expect most ~C160 jobs to need a few rounds of filtering if we set target relations to 145M. I suppose your sieving machine needs more than 80 minutes to sieve...
Forum: CADO-NFS 2021-05-29, 16:30
Replies: 96
Views: 22,586
Posted By VBCurtis
5.5M matrix is still a bit on the small side. I...

5.5M matrix is still a bit on the small side. I bet 155M relations would work fine; if you don't mind spending the time to check, I'd appreciate it.

Note that CADO and msieve measure density in...
Forum: CADO-NFS 2021-05-20, 16:19
Replies: 96
Views: 22,586
Posted By VBCurtis
No, the files at C150 and below are pretty well...

No, the files at C150 and below are pretty well tested and refined. It's C155+ that have few jobs run.
Forum: CADO-NFS 2021-05-20, 15:23
Replies: 96
Views: 22,586
Posted By VBCurtis
As you go up in relations, you will go up in TD...

As you go up in relations, you will go up in TD too.

I think if you do this for 190 vs 195 vs 200M rels you'll find out the interesting parts about how extra sieving -> higher TD -> smaller-er...
Forum: CADO-NFS 2021-05-19, 19:18
Replies: 96
Views: 22,586
Posted By VBCurtis
Your comparison of 3.5 hrs per 5M rels shows that...

Your comparison of 3.5 hrs per 5M rels shows that any oversieving past 190M is inefficient. This surprises me- I would have expected 195 or 200 to be the "sweet spot", where the sieve time spent...
Forum: CADO-NFS 2021-05-18, 16:27
Replies: 96
Views: 22,586
Posted By VBCurtis
Ah, I see- yes, I'd use TD 100 to test various...

Ah, I see- yes, I'd use TD 100 to test various relations counts, because higher TDs may not produce matrices. If TD 100 doesn't produce a matrix, that relations count is too low to be useful to us...
Forum: CADO-NFS 2021-05-18, 14:43
Replies: 96
Views: 22,586
Posted By VBCurtis
No, there's a flag like filter_maxrels that lets...

No, there's a flag like filter_maxrels that lets you control the number of relations msieve uses.

TD 100 vs TD 110 shows you the effect of using higher target densities for a given set of...
Forum: CADO-NFS 2021-05-17, 12:14
Replies: 96
Views: 22,586
Posted By VBCurtis
Having more available relations allows filtering...

Having more available relations allows filtering to work harder, generating a smaller matrix. Setting target density higher explicitly tells filtering to work harder, but even holding target density...
Forum: CADO-NFS 2021-05-10, 14:35
Replies: 96
Views: 22,586
Posted By VBCurtis
Doesn't matter whether msieve or cado does the...

Doesn't matter whether msieve or cado does the matrix; I use matrix size as a marker for whether target_relations was set too high or too low.

Final Q can be found in the log, though it's not in...
Forum: CADO-NFS 2021-05-10, 02:31
Replies: 96
Views: 22,586
Posted By VBCurtis
Bur requested a 165 params file, so I attach a...

Bur requested a 165 params file, so I attach a draft here.

If you use this file, please report:
1. Did filtering work the first time, or did CADO bounce back and forth between filtering and...
Forum: CADO-NFS 2020-05-15, 14:49
Replies: 96
Views: 22,586
Posted By VBCurtis
Well, at least the matrix got smaller! 213M rels...

Well, at least the matrix got smaller! 213M rels at 31/32 vs 189M at 31/31/3LP; we could tighten lambda a bit more (1.84 and 1.83, respectively) and expect rels_wanted to drop another ~5M or so. I...
Showing results 1 to 25 of 27

 
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