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Forum: Msieve 2022-08-10, 19:25
Replies: 117
Views: 30,450
Posted By VBCurtis
NFS = Number Field Sieve. That's a method of...

NFS = Number Field Sieve. That's a method of factorization.
GNFS and SNFS are types of NFS jobs: General and Special. General is just that- the input number has no special form. Special means the...
Forum: CADO-NFS 2022-08-10, 19:04
Replies: 97
Views: 23,982
Posted By VBCurtis
I return home Saturday, I ought to be able to...

I return home Saturday, I ought to be able to post a faster one Sunday for C150 and C155.

I was nearly done refining C100-C130 params when I left on this trip; C135-C155 I still have more data to...
Forum: Msieve 2022-08-10, 18:57
Replies: 117
Views: 30,450
Posted By VBCurtis
Yep! There's lots of factoring projects out...

Yep! There's lots of factoring projects out there, and many of them have a pleasant intellectual challenge to figure out how to make SNFS polynomials when such forms are possible.

Msieve can...
Forum: Msieve 2022-08-10, 00:58
Replies: 117
Views: 30,450
Posted By VBCurtis
Aw, thanks for the shout-out, Sean! I can...

Aw, thanks for the shout-out, Sean!

I can clarify a little bit about the 0.055 and 0.06 ratios for stage 1 and stage 2 norms:

Stage 1 is the part run on the GPU, and even a slow GPU produces a...
Forum: Msieve 2022-08-09, 22:33
Replies: 117
Views: 30,450
Posted By VBCurtis
You can tell msieve which coefficients (c5...

You can tell msieve which coefficients (c5 values) to search over for -np. So, you can in effect resume a search by noting what coeff your last search ended at, and starting your next round at...
Forum: NFS@Home 2022-08-09, 14:10
Replies: 102
Views: 5,799
Posted By VBCurtis
It doesn't. The required number rises by ~75%. ...

It doesn't. The required number rises by ~75%.
Many test-sievers use "twice as many relations" as their metric, and decide the smaller LPB is faster when it's not. I've completed 32LP jobs with...
Forum: NFS@Home 2022-08-08, 02:26
Replies: 102
Views: 5,799
Posted By VBCurtis
I've never noticed this- my matrices seem to...

I've never noticed this- my matrices seem to depend on input size much more than LP size, until I get to 32LP. I'd be quite surprised to learn that 30 vs 31 is more than 15% larger matrix, for a...
Forum: NFS@Home 2022-08-07, 13:36
Replies: 102
Views: 5,799
Posted By VBCurtis
Bur- When testing params choices on CADO, I...

Bur-
When testing params choices on CADO, I find I need 2-3% more relations per digit for a given LP bound choice, and 70% more relations for a given input number for each increase of 1 LPB. 2% per...
Forum: Conjectures 'R Us 2022-08-05, 15:26
Replies: 1,729
Views: 188,726
Posted By VBCurtis
Is this the most unlucky range result yet in this...

Is this the most unlucky range result yet in this project? A more-than-doubling of N-range tested with just one out of 21 k-values solved seems rather exceptional.
Forum: Science & Technology 2022-08-01, 20:11
Replies: 76
Views: 40,625
Posted By VBCurtis
If uniform density, centre of mass of a finite...

If uniform density, centre of mass of a finite sphere is at the center of the sphere; or, why isn't it the same for a circle, sphere, and 3-sphere? I suppose I'm missing a subtlety when addressing a...
Forum: Science & Technology 2022-08-01, 18:35
Replies: 76
Views: 40,625
Posted By VBCurtis
If we accept the universe is finite in size, then...

If we accept the universe is finite in size, then the center of mass of this finite object is where I would expect matter to collapse toward. That would be the "preferred place".
Forum: Factoring 2022-07-31, 18:16
Replies: 91
Views: 6,630
Posted By VBCurtis
So, your claim is that M1277 is a perfect square?...

So, your claim is that M1277 is a perfect square? That is, its square root is an integer?

And your evidence for this is that you used an *integer* math package to compute the square root? It...
Forum: NFS@Home 2022-07-30, 01:37
Replies: 96
Views: 6,133
Posted By VBCurtis
For gnfs jobs, qmax should be no more than 8...

For gnfs jobs, qmax should be no more than 8 times qmin, otherwise the duplicate ratio gets so high as to make the lower-Q relations not worth gathering.
Maybe start this job at Q= 60M? Or is my...
Forum: Aliquot Sequences 2022-07-28, 23:24
Replies: 1,809
Views: 209,838
Posted By VBCurtis
I added ~350 terms to 13^42. I'll keep working...

I added ~350 terms to 13^42. I'll keep working on it, after a summer break for heat management.
Forum: CADO-NFS 2022-07-26, 15:04
Replies: 2
Views: 372
Posted By VBCurtis
When I use the command-line flag --server-threads...

When I use the command-line flag --server-threads 10, all phases of the job use 10 threads or fewer. I haven't tried -t, and I'm not sure if they're two invocations of the same flag.

Why are you...
Forum: Cunningham Tables 2022-07-26, 15:01
Replies: 19
Views: 16,766
Posted By VBCurtis
With use of remdups and remsing, I'm confident...

With use of remdups and remsing, I'm confident that a 36/35 job could be sent to msieve with fewer than 4G relations.

We can also do a team-sieve with CADO for low Q, say 100-250M, with A=32 and...
Forum: NFS@Home 2022-07-25, 06:18
Replies: 96
Views: 6,133
Posted By VBCurtis
Thanks, Carlos, and the rest of you for pointing...

Thanks, Carlos, and the rest of you for pointing out that our lack of control over clients must lead us to feed the queue that sells, so to speak.
As long as the 15e queue doesn't get long like when...
Forum: NFS@Home 2022-07-24, 23:56
Replies: 96
Views: 6,133
Posted By VBCurtis
How much faster is the 16e siever for this job? ...

How much faster is the 16e siever for this job?

The whole point of f-small was to use the 16e siever any time it is faster than 15e. It's hard for me to believe that these jobs using Q upwards of...
Forum: XYYXF Project 2022-07-23, 02:31
Replies: 32
Views: 16,920
Posted By VBCurtis
Uh-oh! :grin: In my view of the factoring...

Uh-oh! :grin:

In my view of the factoring world, Cunninghams (even extensions) deserve some prority. So, while I bemoan the lack of efficiency caused by C195 on 15e, I understand why it happens.
Forum: XYYXF Project 2022-07-22, 23:38
Replies: 32
Views: 16,920
Posted By VBCurtis
That poly score matches the record for a deg 6...

That poly score matches the record for a deg 6 C217. Yuck!
I'll do a test-sieve with CADO, using 34LP on r side and 35 on a side. If I'm keeping my CADO translation straight, that's lpb0 = 34 and...
Forum: XYYXF Project 2022-07-22, 20:01
Replies: 32
Views: 16,920
Posted By VBCurtis
We're using 15e to solve SNFS-280, and difficulty...

We're using 15e to solve SNFS-280, and difficulty 303 sounds like it's only around 5x harder- so going up one siever and up one large-prime bit sounds like it "should" be enough. Can you post the...
Forum: NFS@Home 2022-07-22, 19:43
Replies: 101
Views: 6,402
Posted By VBCurtis
I use 120 for all but the smallest jobs (and I...

I use 120 for all but the smallest jobs (and I don't post-process the small jobs on e-small or 14 anymore). I'm not convinced 124 or 130 results in a faster-to-solve matrix anyway, and if I get a...
Forum: Aliquot Sequences 2022-07-22, 04:53
Replies: 664
Views: 29,370
Posted By VBCurtis
Here are my best times using CADO on a 5950X w/...

Here are my best times using CADO on a 5950X w/ 3200Mhz memory:
111 digits 8:33
115 digits 13:43
119 digits 24:58
124 digits 41:10
127 digits 58:50
131 digits 1:38:19
135 digits 3:00:27 (this...
Forum: Aliquot Sequences 2022-07-21, 19:09
Replies: 158
Views: 53,637
Posted By VBCurtis
Looks correct to me, Ryan. mfb1 = 101...

Looks correct to me, Ryan.

mfb1 = 101 appears marginally faster than 100, and while my 50kQ test showed the same yield it should also yield a tiny bit better. It shouldn't matter much, but 101...
Forum: Aliquot Sequences 2022-07-21, 15:36
Replies: 664
Views: 29,370
Posted By VBCurtis
I tested this trick, and lingen runs normally...

I tested this trick, and lingen runs normally while other tasks are running. :tu:
Showing results 1 to 25 of 1000

 
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