mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.37 seconds.
Search: Posts Made By: axn
Forum: Data 2021-11-26, 14:18
Replies: 996
Views: 122,259
Posted By axn
Some scaling results for 30.8b1 CPU: Ryzen...

Some scaling results for 30.8b1

CPU: Ryzen R5 3600. Ubuntu 20.04
5 workers running stage 1. 6th worker running Stage 2.
FFT=320K / 384K. No roundoff checking. B1=1.1M. All stage 2 runs were...
Forum: Data 2021-11-26, 13:11
Replies: 996
Views: 122,259
Posted By axn
F12-F15 is probably less useful because GMP-ECM...

F12-F15 is probably less useful because GMP-ECM would also work. However, probably still worth a shot.

If there is sufficient RAM, it might even work with F29.
Forum: Data 2021-11-25, 16:52
Replies: 996
Views: 122,259
Posted By axn
Not to the same extent as tiny ones, but more...

Not to the same extent as tiny ones, but more memory you throw at it, the better the gains. So, yes, those kind of very large RAM allocations will be useful.
Forum: Data 2021-11-25, 11:48
Replies: 996
Views: 122,259
Posted By axn
Unfortunately, in this case, the blunder was all...

Unfortunately, in this case, the blunder was all mine. My dumbass totally forgot that I was supposed to skip those. Sorry! :-(

From the project's perspective, 5.5 is complete, so I'm no longer...
Forum: Data 2021-11-24, 17:07
Replies: 996
Views: 122,259
Posted By axn
If it is anything like GMP-ECM, it will eat up...

If it is anything like GMP-ECM, it will eat up all the memory you can throw at it.

If you ran George's test cases with 20 GB instead of 6.5 GB, you should see another factor of sqrt(20/6.5)=1.7x...
Forum: Data 2021-11-24, 16:33
Replies: 996
Views: 122,259
Posted By axn
I believe 30.4 was the first improvement. ...

I believe 30.4 was the first improvement.


IIUC, the more RAM you allocate (or more to the point, the more temps it can allocate), the greater the speed up ratio. So the 2x-6x seen in George's...
Forum: Data 2021-11-24, 13:49
Replies: 996
Views: 122,259
Posted By axn
Few questions, in no particular order: 1) Why...

Few questions, in no particular order:
1) Why is 30.8 using larger FFTs on these two examples?
2) Is this using GMP-ECM-like stage 2 -- i.e. O(sqrt(B2)) [I think] given sufficient RAM?
3) "It...
Forum: Software 2021-11-22, 14:57
Replies: 10
Views: 686
Posted By axn
Sorry, I meant to reply to this earlier but...

Sorry, I meant to reply to this earlier but somehow slipped my mind.

Anyway, the code computes a cost function of including p^n in the product. It is basically log(p) (i.e proportional to the...
Forum: Math 2021-11-22, 14:39
Replies: 9
Views: 243
Posted By axn
Sure, I'm aware of this possibility. In this...

Sure, I'm aware of this possibility. In this particular case, 3 == 394^59 (mod 1181), so we effectively did a proper P-1 using based 394.

It is much more likely to work when we're working with...
Forum: Math 2021-11-22, 14:26
Replies: 9
Views: 243
Posted By axn
Ok. Then, can you give an example where the size...

Ok. Then, can you give an example where the size of 3^E-1 mattered instead of the the smoothness of E?
Forum: Math 2021-11-22, 12:00
Replies: 9
Views: 243
Posted By axn
I suspect that you haven't quite understood how...

I suspect that you haven't quite understood how P-1 works. P-1 only cares for the smoothness of the (unknown factor minus 1). It just so happens that, for mersenne primes, the (factor-1) has a...
Forum: Data 2021-11-20, 05:20
Replies: 996
Views: 122,259
Posted By axn
Wow! Respect! :bow:

Wow! Respect!

:bow:
Forum: Lone Mersenne Hunters 2021-11-18, 16:54
Replies: 1,985
Views: 270,804
Posted By axn
Time to upgrade?

Time to upgrade?
Forum: Lone Mersenne Hunters 2021-11-18, 10:38
Replies: 1,985
Views: 270,804
Posted By axn
Nice. But... E=6?! What version of P95 are you...

Nice. But... E=6?! What version of P95 are you using?
Forum: Lounge 2021-11-18, 04:05
Replies: 1,145
Views: 101,624
Posted By axn
Freudian slip?

Freudian slip?
Forum: Lounge 2021-11-11, 17:04
Replies: 4,400
Views: 376,110
Posted By axn
Check out the video. It has a visual comparison.

Check out the video. It has a visual comparison.
Forum: Lounge 2021-11-11, 14:44
Replies: 4,400
Views: 376,110
Posted By axn
JAczd3mt3X0

JAczd3mt3X0
Forum: Miscellaneous Math 2021-11-10, 17:37
Replies: 429
Views: 39,645
Posted By axn
A 3080 does 50:1 TF:PRP GHz. That means by the...

A 3080 does 50:1 TF:PRP GHz. That means by the time it produces 22k TF GHzDays it would had done maybe 500 PRP GHzDays. The calculus might be more favorable if it were a 6900 (8:1??).

So while I...
Forum: Data 2021-11-07, 02:22
Replies: 576
Views: 108,428
Posted By axn
https://www.mersenne.ca/prp.php

https://www.mersenne.ca/prp.php
Forum: PrimeNet 2021-11-05, 16:53
Replies: 35
Views: 1,007
Posted By axn
Yep. Sorry about the confusion.

Yep. Sorry about the confusion.
Forum: Software 2021-11-05, 08:02
Replies: 10
Views: 686
Posted By axn
Does this look right? merit(p, n) = log(p) *...

Does this look right?

merit(p, n) = log(p) * (p-1) * p^(n-1);
find_count(p, t)=my(m); for(i=2, oo, m=merit(p, i); if(m > t, return(i-1)));
old_find_count(p, B1)=floor(log(B1)/log(p));

B1 =...
Forum: PrimeNet 2021-11-05, 06:36
Replies: 35
Views: 1,007
Posted By axn
128 temps= all 8-bit patterns (only odd numbers...

128 temps= all 8-bit patterns (only odd numbers are considered) = on average 9 bits per multiplication (after each chunk of 8 bits, we expect a run of 0 bits with average length one -- which we can...
Forum: PrimeNet 2021-11-05, 03:59
Replies: 35
Views: 1,007
Posted By axn
This is a poor argument. It provides no framework...

This is a poor argument. It provides no framework to decide what should be the actual "tests saved" to be used. I mean, one could easily ask: "Why stop at 2? Why not 3? Why not 10? Why not eleventy...
Forum: Software 2021-11-04, 03:19
Replies: 10
Views: 686
Posted By axn
It is not worth it. You're better off just...

It is not worth it. You're better off just adding new primes into B1 (i.e. extend B1).
Forum: Aliquot Sequences 2021-10-31, 02:26
Replies: 7
Views: 430
Posted By axn
My emphasis. Looks like only even values are...

My emphasis. Looks like only even values are being considered, so the "most" applies to only the even values?
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 15:16.


Mon Nov 29 15:16:31 UTC 2021 up 129 days, 9:45, 0 users, load averages: 1.65, 1.59, 1.47

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.