ECM Efforts

[R.D. Silverman]

Hello to All;

I am thankful for the help people have given in applying ECM efforts to
the 2+ table.

I am in the process of doing 2,737+ via NFS and will then do 2,749+.
Finishing these will take me about 3 months.

Before I go further, I ask that some additional ECM effort be expended in
particular on the following numbers: (to at least the 45 digit level)

2,791+, 2,951+, 2,969+, 2,993+, 2,1322M, 2,1334L, 2,1342L.

Thanks in advance for any help.

[Xyzzy]

I'd be willing to do some of this work if you could simplify it a bit... As it is now, I would have to refer to the various tables and try to determine how far each one has been done, and in the process hope that the work isn't being duplicated...

Is it possible for you to just ask for x curves for a particular number at a particular depth? I could set up something like that in a matter of minutes and walk away...

One reason I have been doing M1061 work is because it is so simple, and I have very little free time to devote to figuring out other work... Well that, and the fact I have no clue what I am doing... Having a dedicated thread for M1061 makes it so easy to coordinate work...

If you want to correspond via email about this work or other work you need done feel free to email me at xyzzyATmersenneforumDOTorg or send me a PM...

Or maybe setting up this work is a lot simpler than I have been doing it? I'd be willing to learn if there is a better way...

[R.D. Silverman]

Originally Posted by Xyzzy

I'd be willing to do some of this work if you could simplify it a bit... As it is now, I would have to refer to the various tables and try to determine how far each one has been done, and in the process hope that the work isn't being duplicated...

Is it possible for you to just ask for x curves for a particular number at a particular depth? I could set up something like that in a matter of minutes and walk away...

One reason I have been doing M1061 work is because it is so simple, and I have very little free time to devote to figuring out other work... Well that, and the fact I have no clue what I am doing... Having a dedicated thread for M1061 makes it so easy to coordinate work...

If you want to correspond via email about this work or other work you need done feel free to email me at xyzzyATmersenneforumDOTorg or send me a PM...

Or maybe setting up this work is a lot simpler than I have been doing it? I'd be willing to learn if there is a better way...

I must be having a stupidity attack because I don't understand the request
to 'simplify'. I don't keep track of exact curve counts; George Woltman
has a web page that gives them. They are just a click away. It is trivial to
determine how many more are required to finish ECM to a given level. Or
have I mis-understood you?

[akruppa]

I believe Xyzzy is asking for step-by-step instructions how to set up the programs so they attack the numbers you requested as he is not familiar with the process.

Xyzzy, I suggest doing the numbers entirely in Prime95 because it's somewhat easier than resuming residues with GMP-ECM. The Aurifeullians (the ones with L or M) are better done with GMP-ECM.

So, to do 1000 curves on 2,791+, you should
1. stop Prime95
2. add the line
ECM=791,11000000,0,1000,0,0,1
to the worktodo.ini file
3. make sure you have the lowp.txt file from http://www.mersenne.org/ecm.htm in your Prime95 directory
4. start Prime95 again

If the ECM= line is first in worktodo.ini, Prime95 should say that it's starting ECM on P791.

The other numbers (2,951+, 2,969+, 2,993+) work the same, except you'd replace the 791 in the "ECM=" line accordingly.

Alex

[R.D. Silverman]

Originally Posted by akruppa

I believe Xyzzy is asking for step-by-step instructions how to set up the programs so they attack the numbers you requested as he is not familiar with the process.

Xyzzy, I suggest doing the numbers entirely in Prime95 because it's somewhat easier than resuming residues with GMP-ECM. The Aurifeullians (the ones with L or M) are better done with GMP-ECM.

So, to do 1000 curves on 2,791+, you should
1. stop Prime95
2. add the line
ECM=791,11000000,0,1000,0,0,1
to the worktodo.ini file
3. make sure you have the lowp.txt file from http://www.mersenne.org/ecm.htm in your Prime95 directory
4. start Prime95 again

If the ECM= line is first in worktodo.ini, Prime95 should say that it's starting ECM on P791.

The other numbers (2,951+, 2,969+, 2,993+) work the same, except you'd replace the 791 in the "ECM=" line accordingly.

Alex

Ah! I am not familiar with the process either, as I use just GMP-ECM;

I just put the number(s) in ASCII, in a file, and type

ecm b1_limit < file > outputfile. I may sometimes modify the step2 limit as
well. Of course, this is called repeatedly by a script.

[smh]

Originally Posted by R.D. Silverman

Ah! I am not familiar with the process either, as I use just GMP-ECM;

I just put the number(s) in ASCII, in a file, and type

ecm b1_limit < file > outputfile. I may sometimes modify the step2 limit as
well. Of course, this is called repeatedly by a script.

There is a -C option to tell gmp-ecm how many curves to run

[akruppa]

...but the -c must be lowercase

Alex

[Xyzzy]

I wasn't clear enough...



I know how to set up the work... I just want someone to tell me what work to do...

For example, say we are working on x... I need someone to simply say:

"I need someone to run 1000 curves on x at y digits depth and report back here!"

And then I can say:

"Okay, I'll do it, and I'll report back soon!"

Setting up the work is easy... Deciding what work needs to be done is what confuses me...

Or we could keep track like we do in the M1061 thread...

Coordinating work in this thread would only take a few minutes and sure would make it easier for people like me... If this is unreasonable please let me know... I don't want to complicate things...

I know Bob has indicated in the past that perhaps we should spend less time on M1061 and more time on other stuff... I'm willing to do so, if someone (Bob?) can make it easy and fun, like it is in the M1061 thread... The only reason I continue to work on M1061 is because the way we keep track of work is fun and simple...

I bet it would only take a few minutes and I bet more people would participate...

[akruppa]

Ah, so it was me who misunderstood...

Ok, to complete the p45 level, we need

8089 more curves at B1=11M for P791,
10420 more curves at B1=11M for P951,
4357 more curves at B1=11M for P969,
10420 more curves at B1=11M for P993.

So, grab a bunch of curves while they're fresh!

Alex

[Xyzzy]

Excellent! I'll start on 2,791+ then...

[hlaiho]

Originally Posted by Xyzzy

Excellent! I'll start on 2,791+ then...

If you're starting to do ECM work with Prime 95 on number 2^791+1, it's recommeded to do number 2^1582-1, because it's faster so. (2^791-1 is already completely factored.)

In the worktodo.ini file 7th value must be 0.

Good luck!

Heikki