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Search: Posts Made By: axn
Forum: Data 2021-12-02, 16:51
Replies: 966
Views: 124,195
Posted By axn
:tu: Yes, with only 16GB available...

:tu:



Yes, with only 16GB available RAM, I understand that you can't give more. Unfortunately, you could've saved several days of computation if you had more RAM.
Forum: Data 2021-12-02, 13:02
Replies: 966
Views: 124,195
Posted By axn
You should have given it a _lot_ more RAM.

You should have given it a _lot_ more RAM.
Forum: Data 2021-12-02, 06:05
Replies: 966
Views: 124,195
Posted By axn
Do you have machines with more RAM? Like 32 GB...

Do you have machines with more RAM? Like 32 GB or more? You'll be surprised (or not) at how much more speedup could be gained by using more RAM. For 2x.x, I would think something like 100+ GB will...
Forum: Software 2021-12-01, 07:26
Replies: 70
Views: 877
Posted By axn
Build 2 is bad with multithreading: P-1 on...

Build 2 is bad with multithreading:
P-1 on M5401951 with B1=8000000, B2=8000000000
Setting affinity to run helper thread 1 on CPU core #2
Setting affinity to run helper thread 3 on CPU core #4...
Forum: Data 2021-12-01, 05:36
Replies: 966
Views: 124,195
Posted By axn
Unlike previous versions which run into...

Unlike previous versions which run into diminishing returns the more RAM you throw at it, 30.8 efficiency keeps on going up as you increase your RAM allocation. So any recommendation that doesn't...
Forum: Software 2021-11-26, 14:18
Replies: 70
Views: 877
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: Software 2021-11-26, 13:11
Replies: 70
Views: 877
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: Software 2021-11-25, 16:52
Replies: 70
Views: 877
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: 966
Views: 124,195
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: Software 2021-11-24, 17:07
Replies: 70
Views: 877
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: Software 2021-11-24, 16:33
Replies: 70
Views: 877
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: Software 2021-11-24, 13:49
Replies: 70
Views: 877
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: 774
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: 278
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: 278
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: 278
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: 966
Views: 124,195
Posted By axn
Wow! Respect! :bow:

Wow! Respect!

:bow:
Forum: Lone Mersenne Hunters 2021-11-18, 16:54
Replies: 1,986
Views: 271,650
Posted By axn
Time to upgrade?

Time to upgrade?
Forum: Lone Mersenne Hunters 2021-11-18, 10:38
Replies: 1,986
Views: 271,650
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: 101,875
Posted By axn
Freudian slip?

Freudian slip?
Forum: Lounge 2021-11-11, 17:04
Replies: 4,402
Views: 376,901
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: 4,402
Views: 376,901
Posted By axn
JAczd3mt3X0

JAczd3mt3X0
Forum: Miscellaneous Math 2021-11-10, 17:37
Replies: 430
Views: 40,414
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: 108,602
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: 1,114
Posted By axn
Yep. Sorry about the confusion.

Yep. Sorry about the confusion.
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