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-   -   GPU72 Largest 100 Factors Found (https://www.mersenneforum.org/showthread.php?t=26201)

LOBES 2020-11-17 05:40

GPU72 Largest 100 Factors Found
 
I was clicking around the site and found the "Largest 100 Factors Found" page interesting:


[URL]https://www.gpu72.com/reports/largest_factors/[/URL]


Is that up-to-date? If so, does it update automatically or is it something Chris updates manually?


I only ask because the largest as of this writing is:


734277451864747167510502805298930545450478445879


I found a factor today of exponent [URL="https://www.mersenne.org/report_exponent/default.php?exp_lo=105032111&full=1"]105032111[/URL]:



499400852887245323683941126088449355702834653807158087



Unless of course, I am completely reading that wrong, which is entirely possible. It is all just so fascinating, and I have such a small grasp of it.

chalsall 2020-11-17 05:49

[QUOTE=LOBES;563450]I was clicking around the site and found the "Largest 100 Factors Found" page interesting:

Unless of course, I am completely reading that wrong, which is entirely possible. It is all just so fascinating, and I have such a small grasp of it.[/QUOTE]

That list is automatically updated. And while your find is impressive, it is, unfortunately, a "composite factor".

BTW, it's a complete fluke that I'm at the top of the list. There are many others putting in far more P-1 efforts than myself; I just got lucky there.

paulunderwood 2020-11-17 05:50

[QUOTE=LOBES;563450]I was clicking around the site and found the "Largest 100 Factors Found" page interesting:


[URL]https://www.gpu72.com/reports/largest_factors/[/URL]


Is that up-to-date? If so, does it update automatically or is it something Chris updates manually?


I only ask because the largest as of this writing is:


734277451864747167510502805298930545450478445879


I found a factor today of exponent [URL="https://www.mersenne.org/report_exponent/default.php?exp_lo=105032111&full=1"]105032111[/URL]:



499400852887245323683941126088449355702834653807158087



Unless of course, I am completely reading that wrong, which is entirely possible. It is all just so fascinating, and I have such a small grasp of it.[/QUOTE]

Congrats! However:

[CODE]? factor(499400852887245323683941126088449355702834653807158087 )

[ 290582744822559701357207 1]

[1718618403140893608084889221841 1]
[/CODE]

LaurV 2020-11-17 09:44

Adding to it, that list only contains factors which are prime and were discovered for assignments taken with GPU-72 (if that's not understood).

To see a list with ever largest factors found, with the method used to find them, see [URL="https://www.mersenne.ca/userfactors/any/1/bits"]mersenne.ca[/URL] list.

LOBES 2020-11-17 14:35

Thanks so much for the responses. That is what I was expecting.


Me: See really long number, longer than the other numbers, think I'm onto something...


Reality: Nah. Not really.

ZFR 2020-11-24 15:28

Wow, those bit levels are way higher than anything that can be (reasonably) done on TF. Those top factors are all from P-1?

chalsall 2020-11-24 19:18

[QUOTE=ZFR;564207]Those top factors are all from P-1?[/QUOTE]

Yes.

ZFR 2020-11-24 20:21

[QUOTE=chalsall;564251]Yes.[/QUOTE]

And unlike TF, P-1 is better done on CPU than GPU, right?

So if I want to devote one of my CPU workers to P-1 instead of PRPs, I can just get a list from GPU72, copy it under that worker in mprime's worktodo, and that's it? B1 and B2 will be chosen automatically by mprime?

chalsall 2020-11-24 20:29

[QUOTE=ZFR;564259]And unlike TF, P-1 is better done on CPU than GPU, right?[/QUOTE]

There's some excellent GPU P-1 software available now. But Prime95/mprime (CPU) is by far the easiest to work with.

[QUOTE=ZFR;564259]So if I want to devote one of my CPU workers to P-1 instead of PRPs, I can just get a list from GPU72, copy it under that worker in mprime's worktodo, and that's it? B1 and B2 will be chosen automatically by mprime?[/QUOTE]

Contemporaneous P-1 work is available from both Primenet and GPU72. Know that GPU72 is currently working at higher ranges (105M) than Primenet (101M) for P-1 assignments. And so the work takes slightly more compute (and, thus, time).

ZFR 2020-11-24 21:07

Thanks. Going to grab some from GPU72 when the next PRP finishes next week. Let's see if I can get my name on that top 100 page.

LOBES 2021-05-13 19:55

[QUOTE=chalsall;564251]Yes.[/QUOTE]

Doh, nevermind.


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