[QUOTE=petrw1;274311]IMHO....
1. P-1 is where the most help is needed
[/QUOTE]
Yes and no.
When George started this thread, most 1st time
LLs were being dished out without P-1, and he
(correctly in my view) thought that the LL wavefront
could do with some speeding up.

Since then, GPUs have entered the scenario.
As one who has been on a continuous diet of LLs for a year or so,
doing the occasional P-1 comes as welcome relief.
It is the TF on GPUs that needs to get its act together.
72 bits is a modest and easily achievable target.
Hardly any 1st time tests are getting dished out
TFed to more than 70.

This is the source of my (evident!) frustration.

OK 3% increase in the chance of an LL test finding a prime
is no big deal, but as an incentive to [B]finish [/B]the test, its effect
is greatly enhanced. I regard the 80% dropout rate (and Dubslow's
impatience) lamentable.

David

[QUOTE=davieddy;274320]It is the TF on GPUs that needs to get its act together. 72 bits is a modest and easily achievable target.[/QUOTE]

Agreed....I only wish there was a TF-GPU option so my poor little PC would not get assigned 70 or 71 bit TF's that can take more than a week.

[QUOTE]I regard the 80% dropout rate <snip> lamentable.
David[/QUOTE]

I might suggest to George and Scott that they invest in disk and then consider ways to upload the "save" files (even once a day) so that these tests that are dropped don't have to start over from the beginning. Granted some are dropped very early but I have also seen tests dropped near completion.

[QUOTE=davieddy;274320]I regard the 80% dropout rate (and Dubslow's
impatience) lamentable.
[/QUOTE]

Uhhh... I was joking. Aside from one core of mfaktc, I keep all my cores on LL. I have 3 54M exponents that have been going for the last three weeks or so. (I have finished all assigned exponents.)

Although, I had a much slower Athlon at home (I'm in college, physics, as chance would have it) that was running all P-1, but it's been down a while and I currently have no way to get it back up.

[QUOTE=Dubslow;274384]Uhhh... I was joking. Aside from one core of mfaktc, I keep all my cores on LL. I have 3 54M exponents that have been going for the last three weeks or so. (I have finished all assigned exponents.)

Although, I had a much slower Athlon at home (I'm in college, physics, as chance would have it) that was running all P-1, but it's been down a while and I currently have no way to get it back up.[/QUOTE]

No offence was intended, I can assure you.
Welcome to the House of Fun:smile:
Is physics getting any simpler these days?

David

PS Where you from? (You sexy thing)

[QUOTE=petrw1;274364]Agreed....I only wish there was a TF-GPU option so my poor little PC would not get assigned 70 or 71 bit TF's that can take more than a week.

I might suggest to George and Scott that they invest in disk and then consider ways to upload the "save" files (even once a day) so that these tests that are dropped don't have to start over from the beginning. Granted some are dropped very early but I have also seen tests dropped near completion.[/QUOTE]

Interfacing GPU/mfaktc with Primenet is on my mate Eric's "to do" list.

As for storing the intermediate residues, this has been suggested
innumerable times. I've yet to hear an answer.
Since the returned expos get dished out immediately the next day,
I can't see why storage ability should constrain this operation.
However, some geezer did raise the point about "torture testing"
and wondered how worthwhile it would be to rely on the result thereof.

I thought several GPU operators might [B]each [/B]TF a few 53/54M exponents to 72 bits.
Instead we encounter what I am now going to dub the "ckdo" effect:
Bag 6000 exponents at once, hog them, farm them out and pretend you
are Lord God Almighty.

(Note my restrained lingo)


David

[QUOTE=davieddy;274403]

I thought several GPU operators might [B]each [/B]TF a few 53/54M exponents to 72 bits.
Instead we encounter what I am now going to dub the "ckdo" effect:
Bag 6000 exponents at once, hog them, farm them out and pretend you
are Lord God Almighty.

(Note my restrained lingo)


David[/QUOTE]

[URL]http://www.cyberhymnal.org/htm/h/o/holyholy.htm[/URL]

(Sorry, couldn't resist)

Chuck

[QUOTE=petrw1;274311]IMHO....
1. P-1 is where the most help is needed
2. On the P-1 list I can feel I am a top contributor. I tried allocating almost everything to LL for a good part of a year and couldn't crack top-100.
3. ECM does NOT contribute to finding Mersenne Primes (I'd like to help)
4. My next PC (when I am working again) will probably have a good GPU ... not necessarily for TF (there are lots there) but it appears LL on a GPU is becomming a reality.[/QUOTE]

:innocent:
Most of my CPUs are also doing P-1...I was joking about the cores that aren't doing P-1...thought LL-D would perhaps be more solidly productive for you.

And ckdo is not god, and is doing the right thing, in the long term...he and his helpers are knocking out factors as quickly as we can find them...in our little corner of the world of doing a bit more TF before LL-Ds are done. Others are going to do the entire 53M range to 72 bits before long...again on the plan of finding the most factors with the least effort...

Back to Euler's totient function in my number theory book....

OK OK I took one
 

Factor=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,54116749,68,72

OK I took a break from my other work for the next hour and a half and accepted this assignment from PrimeNet (upped it from 69—>72).

Chuck

I usually do the same thing, up whatever assignment to 71 bits for 53M. That's what George is aiming for.

[QUOTE=Christenson;274413]:innocent:
Back to Euler's totient function in my number theory book....[/QUOTE]
Have you checked out his angles yet?

[QUOTE=Chuck;274421]Factor=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,54116749,68,72

OK I took a break from my other work for the next hour and a half and accepted this assignment from PrimeNet (upped it from 69—>72).

Chuck[/QUOTE]

Nuts, didn't find a factor...