mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.34 seconds.
Search: Posts Made By: VBCurtis
Forum: Cunningham Tables 2021-11-27, 06:38
Replies: 5
Views: 232
Posted By VBCurtis
If there is little dropoff in score for larger...

If there is little dropoff in score for larger leading coeff's, doesn't that argue for incr-4620 rather than 420? That is, we should take advantage of the slightly better typical poly that an extra...
Forum: Data 2021-11-24, 21:21
Replies: 986
Views: 121,590
Posted By VBCurtis
Depends on how big B2 is, and how big the input...

Depends on how big B2 is, and how big the input is. Once available, experiment. For inputs from this project, two workers and 50GB may be better but for larger inputs a single worker would be. If...
Forum: Conjectures 'R Us 2021-11-24, 17:23
Replies: 1,128
Views: 109,688
Posted By VBCurtis
60-61G complete from 25k-100k. Primes emailed to...

60-61G complete from 25k-100k. Primes emailed to Gary.

ETA on 61-63G is 3 weeks.
Forum: Cunningham Tables 2021-11-24, 05:01
Replies: 315
Views: 44,007
Posted By VBCurtis
I think your CPU will do the job in under a...

I think your CPU will do the job in under a month. We should have factors just before the new year.
Looks like we reach our relations target Wednesday- I suggest Ed point his farm elsewhere tomorrow...
Forum: Cunningham Tables 2021-11-22, 02:37
Replies: 315
Views: 44,007
Posted By VBCurtis
I vote to stop sieving Thursday. That should be...

I vote to stop sieving Thursday. That should be 1.4xG relations, and pretty far down the "more relations makes a smaller matrix" curve. The matrix should be 60M or so by then.

You can use TD of...
Forum: Hardware 2021-11-21, 04:04
Replies: 7
Views: 552
Posted By VBCurtis
What kind of change in FFT speed? Or, what part...

What kind of change in FFT speed? Or, what part of the FFT changes in your hypothetical?

I can't tell if you have something specific in mind (like a software optimization, or FPGA use) but are...
Forum: Cunningham Tables 2021-11-20, 18:31
Replies: 315
Views: 44,007
Posted By VBCurtis
Also, you are correct that filtering and...

Also, you are correct that filtering and matrix-building is single-threaded.
CADO's is multi-threaded, but that doesn't help us here since CADO matrix-solving is so much slower.

If only we knew...
Forum: Cunningham Tables 2021-11-20, 18:05
Replies: 315
Views: 44,007
Posted By VBCurtis
CADO should keep running until we get a...

CADO should keep running until we get a manageable matrix. 73M at 1.25G relations suggests we have another day or three to go; hopefully filtering can be run once a day until the matrix doesn't...
Forum: NFS@Home 2021-11-19, 17:25
Replies: 217
Views: 24,028
Posted By VBCurtis
13_2_912m has built a 26.6M matrix at TD=124, and...

13_2_912m has built a 26.6M matrix at TD=124, and is in postprocessing.
Forum: Software 2021-11-19, 16:59
Replies: 22
Views: 609
Posted By VBCurtis
No. You found out what George already told you:...

No. You found out what George already told you: Prime95 is not the right software for small Mersennes and large bounds.
Forum: Cunningham Tables 2021-11-18, 19:52
Replies: 315
Views: 44,007
Posted By VBCurtis
Naw, I forgot how fast we're gathering relations....

Naw, I forgot how fast we're gathering relations. Default vs TD 100 is a mildly interesting data point for matrix size, but we won't be using either of those matrices so it's not important.

I...
Forum: Cunningham Tables 2021-11-18, 17:37
Replies: 315
Views: 44,007
Posted By VBCurtis
Using...

Using https://mersenneforum.org/showthread.php?t=24054 data as a guide and adding 35% to relations to account for 33/34LP rather than 33LP for all the 16e jobs run on NFS@home, I figured 950M unique...
Forum: Factoring 2021-11-18, 05:17
Replies: 987
Views: 118,025
Posted By VBCurtis
Have you looked at the nfs@home subforum? ...

Have you looked at the nfs@home subforum?

ECM-pretest a candidate to at least the usual depth, test-sieve on the appropriate siever to determine Q-range, and post the job. The size and parameter...
Forum: Cunningham Tables 2021-11-16, 20:15
Replies: 315
Views: 44,007
Posted By VBCurtis
Yay for Seth-stats! Also, nice chart for yield...

Yay for Seth-stats! Also, nice chart for yield per WU.

Boo for learning how little I contributed to the job, but seeing how slow (in rel/sec) my machine sieves is a nice reminder to maybe go...
Forum: CADO-NFS 2021-11-14, 05:14
Replies: 18
Views: 773
Posted By VBCurtis
I think the first half of this thought is in...

I think the first half of this thought is in direct conflict with the second half. Bleeding-edge custom machines are exactly where you fight with hardware, firmware, etc. Buy a quality prebuilt...
Forum: CADO-NFS 2021-11-13, 06:44
Replies: 18
Views: 773
Posted By VBCurtis
My HP Z620 is a dual-Xeon 2680v2, 10 core at...

My HP Z620 is a dual-Xeon 2680v2, 10 core at 2.8Ghz Ivy Bridge era (the one before Haswell). I am running the client instances 10-threaded, with 40 threads occupied. I sampled a dozen or so...
Forum: CADO-NFS 2021-11-12, 22:10
Replies: 18
Views: 773
Posted By VBCurtis
If I were to create a CADO benchmark thread and...

If I were to create a CADO benchmark thread and include in the first post a standard-test file to run (input and parameters), is RSA120 an acceptable size to benchmark? On my older multi-core boxes...
Forum: NFS@Home 2021-11-12, 21:48
Replies: 217
Views: 24,028
Posted By VBCurtis
I screwed this job up- I test-sieved a 32/33...

I screwed this job up- I test-sieved a 32/33 hybrid, and the yield data I posted with the job was from 32/33. After that test, I changed the file to test 33/33, and didn't notice that I failed to...
Forum: CADO-NFS 2021-11-12, 17:29
Replies: 18
Views: 773
Posted By VBCurtis
I wish, as this seems second-most-likely after a...

I wish, as this seems second-most-likely after a motherboard failure.

When the crashes first started a few months ago, they were quite rare (like a batch of 2-3 with 20-40 days of stability in...
Forum: CADO-NFS 2021-11-11, 23:45
Replies: 18
Views: 773
Posted By VBCurtis
Good idea, and I have one of those lying around...

Good idea, and I have one of those lying around since it's the same battery for my car keyfob. I'll give that a try.

Symptoms are irregularly-spaced crashes that are not temperature-related; I've...
Forum: CADO-NFS 2021-11-11, 21:05
Replies: 18
Views: 773
Posted By VBCurtis
How do various CPU architectures compare for CADO speed?

My homebuilt haswell-generation desktop seems to have gone kablooey. Time for a new (likely used xeon) machine!

Before I pull the trigger, I thought I'd ask if any of y'all have relative speed...
Forum: Data 2021-11-11, 14:07
Replies: 119
Views: 10,119
Posted By VBCurtis
Not a bug; the FFT can't be split into infinitely...

Not a bug; the FFT can't be split into infinitely small chunks profitably.
A smaller exponent uses a smaller FFT, so exponents smaller than some (unknown to me) cutoff won't run any faster...
Forum: Flea Market 2021-11-10, 22:31
Replies: 26
Views: 1,234
Posted By VBCurtis
I point out that a new GPU works in your old PC...

I point out that a new GPU works in your old PC to communicate that worrying about a 2024 GPU in a 2022 PC is unnecessary.

The size of your power supply has nothing to do with the quality of your...
Forum: Flea Market 2021-11-10, 21:06
Replies: 26
Views: 1,234
Posted By VBCurtis
If you had to change your motherboard because of...

If you had to change your motherboard because of a new GPU card, that would mean the market for that GPU would be tiny- a 2021 GPU can be plugged in to a ~2012 machine, or even older. That's by...
Forum: Flea Market 2021-11-09, 01:45
Replies: 26
Views: 1,234
Posted By VBCurtis
Any computer with a bit of RAM can do the TF and...

Any computer with a bit of RAM can do the TF and P-1 that you want. Who cares if it takes 1 day or 3? There is no such thing as "fast enough". That measurement is about the user, not the machine....
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 22:38.


Sat Nov 27 22:38:05 UTC 2021 up 127 days, 17:07, 0 users, load averages: 1.80, 1.92, 1.72

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, 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.