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Forum: Riesel Prime Search 2021-09-18, 04:27
Replies: 669
Views: 81,342
Posted By VBCurtis
Seeing as how there have been no reservations in...

Seeing as how there have been no reservations in four years, I think you can have at it.

If you don't mind a little patience, we can ask if anyone wishes to do 6-6.1M before you start- perhaps...
Forum: Msieve 2021-09-17, 19:44
Replies: 50
Sticky: Msieve GPU LA
Views: 2,392
Posted By VBCurtis
I'm gonna hand-wave here, since only a few people...

I'm gonna hand-wave here, since only a few people have bothered taking data:

When a relation set is right at the cusp of building a matrix, a few more hours sieving will save more than a few hours...
Forum: Msieve 2021-09-17, 16:52
Replies: 50
Sticky: Msieve GPU LA
Views: 2,392
Posted By VBCurtis
In principle, yes. There's an electricity...

In principle, yes. There's an electricity savings to be had by over-sieving less and accepting larger matrices, especially on the e-small queue where matrices are nearly all under 15M. However, one...
Forum: Riesel Prime Search 2021-09-17, 05:00
Replies: 669
Views: 81,342
Posted By VBCurtis
5250-5300 complete, no primes. Results file...

5250-5300 complete, no primes.

Results file attached; I'll leave it here for a couple weeks in case anyone wants it, and then I'll delete to save space on the forum.

Should I change the...
Forum: NFS@Home 2021-09-17, 02:15
Replies: 168
Views: 13,273
Posted By VBCurtis
13_2_889m1 has been factored: p68 factor:...

13_2_889m1 has been factored:
p68 factor: 16198615149065734454793567815564974310130633967067455652347061521813
p144 factor:...
Forum: NFS@Home 2021-09-15, 22:04
Replies: 182
Views: 20,025
Posted By VBCurtis
QUEUED AS 13_2_911m1 13*2^911-1 is ready...

QUEUED AS 13_2_911m1

13*2^911-1 is ready for SNFS, after 2T55 of ECM:
n:...
Forum: Riesel Prime Search 2021-09-14, 16:27
Replies: 669
Views: 81,342
Posted By VBCurtis
Still just under 2k left.

Still just under 2k left.
Forum: Cunningham Tables 2021-09-12, 22:05
Replies: 66
Views: 29,987
Posted By VBCurtis
Judging by the records for 200-201-202, a 3.0...

Judging by the records for 200-201-202, a 3.0 should be possible. Like Kruoli, I'll hope for some lucky spin!
Forum: NFS@Home 2021-09-09, 21:06
Replies: 33
Views: 3,632
Posted By VBCurtis
I'd guess 875-900M relations to get a nice...

I'd guess 875-900M relations to get a nice matrix; perhaps 50-330M and try filtering before deciding how many more Q?

Yield of almost-3.0 sounds quite nice!
Forum: Msieve 2021-09-09, 21:00
Replies: 50
Sticky: Msieve GPU LA
Views: 2,392
Posted By VBCurtis
It's a 32/33 hybrid, with a healthy amount of...

It's a 32/33 hybrid, with a healthy amount of oversieving (I wanted a matrix below 30M dimensions, success!).

I'm impressed that fits on your card, and 50hr is pretty amazing- I just started the...
Forum: CADO-NFS 2021-09-07, 14:22
Replies: 60
Views: 11,782
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: Aliquot Sequences 2021-09-05, 21:34
Replies: 524
Views: 63,287
Posted By VBCurtis
We would need quite a lot of extra sieving to get...

We would need quite a lot of extra sieving to get a matrix under 32GB in memory footprint; if you have 64, you're going to be fine (possibly with CADO, definitely with msieve).

Barring any new...
Forum: Aliquot Sequences 2021-09-04, 04:52
Replies: 524
Views: 63,287
Posted By VBCurtis
This is good enough to sieve with. Between...

This is good enough to sieve with.

Between this and the Cunningham 3,748+ C204, one should go to f-small and the other should be a team sieve. Which should be which? My vote is to team-sieve...
Forum: NFS@Home 2021-09-04, 01:16
Replies: 1,849
Views: 155,661
Posted By VBCurtis
Well, I hope nobody tries to test-sieve with the...

Well, I hope nobody tries to test-sieve with the params provided with the poly! lim's above 2^30, but 32bit large primes?

GNFS-208 is not too hard for f-small; lim's of 225M are a bit restrictive...
Forum: NFS@Home 2021-09-02, 22:24
Replies: 182
Views: 20,025
Posted By VBCurtis
QUEUED AS 13_2_909m1 13*2^909-1 is ready for...

QUEUED AS 13_2_909m1

13*2^909-1 is ready for SNFS on 15e:
n:...
Forum: CADO-NFS 2021-09-02, 21:28
Replies: 60
Views: 11,782
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: Aliquot Sequences 2021-09-02, 15:51
Replies: 524
Views: 63,287
Posted By VBCurtis
I use 0.05 for C140-C160 to reduce matrix time...

I use 0.05 for C140-C160 to reduce matrix time when running all jobs on a single machine; I think EdH (who sieves on a "farm" of a dozen or more smaller machines) uses 0.08 or 0.10. The number is a...
Forum: CADO-NFS 2021-09-02, 15:33
Replies: 60
Views: 11,782
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: Prime Gap Searches 2021-09-02, 04:40
Replies: 45
Views: 8,388
Posted By VBCurtis
Naming something after yourself is the most...

Naming something after yourself is the most reliable way I know of to ensure nobody else ever uses your name to describe it.
Forum: Factoring 2021-09-01, 04:46
Replies: 10
Views: 242
Posted By VBCurtis
Do you have evidence that your compiled GGNFS...

Do you have evidence that your compiled GGNFS binaries work? That is, do they function when called by factmsieve.py or yafu?

If not, acquire working binaries or run one of those scripts to...
Forum: Aliquot Sequences 2021-09-01, 02:45
Replies: 3,105
Views: 247,710
Posted By VBCurtis
I appreciate the detail in the writeup- for e.g....

I appreciate the detail in the writeup- for e.g. Bur who sees a future in test-sieving, that post is a nice place to start.
Here's the conclusion for Ryan:
tasks.lim0 = 500000000
tasks.lim1 =...
Forum: Aliquot Sequences 2021-08-31, 03:33
Replies: 3,105
Views: 247,710
Posted By VBCurtis
Not just yet- we have to pick sieve parameters...

Not just yet- we have to pick sieve parameters first!

I used lpb0=34 and lpb1=35 for the GNFS-207 team sieve two years ago, and both LP bounds were higher than they needed to be. I believe those...
Forum: Software 2021-08-29, 00:14
Replies: 432
Views: 45,493
Posted By VBCurtis
Why are you trying to make P95 do what LLR is...

Why are you trying to make P95 do what LLR is designed for?
Forum: Msieve 2021-08-27, 20:09
Replies: 26
Views: 1,161
Posted By VBCurtis
Far as I know (it has been years since I paid any...

Far as I know (it has been years since I paid any attention to msieve poly select, so some of this is as vague as my memory):
Leading coeff is not randomized. Multiples of 12 at the very smallest...
Forum: Msieve 2021-08-27, 18:30
Replies: 26
Views: 1,161
Posted By VBCurtis
Well, the reason we control either stage1 or...

Well, the reason we control either stage1 or stage2 norms from the command line is because msieve's defaults are from the era before GPUs, while GPUs produce 50-100x more data from stage1.

So, if...
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