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Search: Posts Made By: GP2
Forum: Software 2018-12-07, 14:58
Replies: 77
Views: 6,653
Posted By GP2
I need to clarify the last paragraph. As I...

I need to clarify the last paragraph.

As I mentioned before, if GmpEcmHook is in effect, then your mprime/Prime95 results.txt file will be full of lines that start with N=

However, the...
Forum: Software 2018-12-06, 20:37
Replies: 77
Views: 6,653
Posted By GP2
How to avoid needlessly redoing stage 1 in GMP-ECM!!!!

I think I figured it out.

As mentioned before, if you want to do stage 1 with mprime/Prime95 and stage 2 wth GMP-ECM, first you need to run mprime/Prime95 with the line GmpEcmHook=1 in your...
Forum: Software 2018-12-06, 19:38
Replies: 77
Views: 6,653
Posted By GP2
These are running on one-core virtual machines,...

These are running on one-core virtual machines, so it's not an issue.

Also it shouldn't matter to gmp-ecm how many cores mprime used in stage 1. The input to ecm is just a number, it shouldn't...
Forum: Software 2018-12-06, 18:21
Replies: 77
Views: 6,653
Posted By GP2
Hmm... so much for my theories about "step" vs....

Hmm... so much for my theories about "step" vs. "stage".

I just tried running a curve where both stage 1 and stage 2 were done with GMP-ECM, and the whole thing actually ran faster than letting...
Forum: Software 2018-12-06, 17:29
Replies: 77
Views: 6,653
Posted By GP2
Perhaps GMP-ECM's implementation of stage 2 uses...

Perhaps GMP-ECM's implementation of stage 2 uses a step 1 and a step 2. So it's not redoing stage 1, at least I hope not. The README file does refer to "stage 1" and "stage 2", so I don't think "step...
Forum: Software 2018-12-06, 15:02
Replies: 77
Views: 6,653
Posted By GP2
If he's using GMP-ECM for stage 2, then I think...

If he's using GMP-ECM for stage 2, then I think it responds non-linearly to memory, no? For a given B2 value it wants a certain amount of memory, and if you reduce that memory by a factor of N (by...
Forum: Software 2018-12-06, 03:36
Replies: 77
Views: 6,653
Posted By GP2
Throw a thousand darts blindfolded, and fail to...

Throw a thousand darts blindfolded, and fail to hit anything. What is the chance that there is actually a dartboard within ten feet in front of you that you will hit on the next throw?

Note: the...
Forum: Software 2018-12-06, 02:29
Replies: 77
Views: 6,653
Posted By GP2
I briefly let Primenet assign me exponents for...

I briefly let Primenet assign me exponents for ECM in the 17M range which had no known factors. It assigned one ECM curve per exponent, with B1=50000, B2=5000000 (i.e., t=25 depth).

It ran for...
Forum: Software 2018-12-05, 21:18
Replies: 77
Views: 6,653
Posted By GP2
The thing is, for small Mersenne numbers there...

The thing is, for small Mersenne numbers there has already been fairly deep ECM search done. It's easier to find factors for smaller Mersenne numbers, but many of the easy factors have already been...
Forum: Software 2018-11-11, 01:01
Replies: 77
Views: 6,653
Posted By GP2
He is talking about an entirely different program...

He is talking about an entirely different program called GMP-ECM. It doesn't use worktodo.txt files. If you use mprime/Prime95, you have to specify B2.

One reason that GMP-ECM can use much larger...
Forum: Software 2018-11-10, 18:03
Replies: 77
Views: 6,653
Posted By GP2
But GMP-ECM uses a different algorithm that is...

But GMP-ECM uses a different algorithm that is only helpful for quite small exponents. He is talking about the exponent 109229, I think that is out of GMP-ECM's useful range.

For mprime I'd say...
Forum: Software 2018-11-10, 17:58
Replies: 77
Views: 6,653
Posted By GP2
I think a factor of 10 is just too small. If...

I think a factor of 10 is just too small. If anything, some people even recommend using a factor larger than 100.



Stage 1 is only affected by B1. Stage 2 is determined by both B1 and B2. In my...
Forum: Software 2018-11-10, 16:09
Replies: 77
Views: 6,653
Posted By GP2
No, it ignores those and keeps going. Note:...

No, it ignores those and keeps going.

Note: if the program finds a new factor not in the list of known factors, then the ECM assignment will terminate, unless you put ContinueECM=1 in your...
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