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 2020-11-17, 05:40 #1 LOBES   Mar 2019 USA 5110 Posts GPU72 Largest 100 Factors Found I was clicking around the site and found the "Largest 100 Factors Found" page interesting: https://www.gpu72.com/reports/largest_factors/ 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 105032111: 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.
2020-11-17, 05:49   #2
chalsall
If I May

"Chris Halsall"
Sep 2002

3×3,181 Posts

Quote:
 Originally Posted by LOBES 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.
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.

2020-11-17, 05:50   #3
paulunderwood

Sep 2002
Database er0rr

19·191 Posts

Quote:
 Originally Posted by LOBES I was clicking around the site and found the "Largest 100 Factors Found" page interesting: https://www.gpu72.com/reports/largest_factors/ 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 105032111: 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.
Congrats! However:

Code:
? factor(499400852887245323683941126088449355702834653807158087 )

[       290582744822559701357207 1]

[1718618403140893608084889221841 1]

Last fiddled with by paulunderwood on 2020-11-17 at 05:50

 2020-11-17, 09:44 #4 LaurV Romulan Interpreter     Jun 2011 Thailand 2·13·192 Posts 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 mersenne.ca list. Last fiddled with by LaurV on 2020-11-17 at 09:45 Reason: s/lost/list/ geez man, fatty fingers!
 2020-11-17, 14:35 #5 LOBES   Mar 2019 USA 3·17 Posts 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.
 2020-11-24, 15:28 #6 ZFR     Feb 2008 Bray, Ireland 11×13 Posts Wow, those bit levels are way higher than anything that can be (reasonably) done on TF. Those top factors are all from P-1? Last fiddled with by ZFR on 2020-11-24 at 15:28
2020-11-24, 19:18   #7
chalsall
If I May

"Chris Halsall"
Sep 2002

3·3,181 Posts

Quote:
 Originally Posted by ZFR Those top factors are all from P-1?
Yes.

2020-11-24, 20:21   #8
ZFR

Feb 2008
Bray, Ireland

11·13 Posts

Quote:
 Originally Posted by chalsall Yes.
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?

2020-11-24, 20:29   #9
chalsall
If I May

"Chris Halsall"
Sep 2002

3×3,181 Posts

Quote:
 Originally Posted by ZFR And unlike TF, P-1 is better done on CPU than GPU, right?
There's some excellent GPU P-1 software available now. But Prime95/mprime (CPU) is by far the easiest to work with.

Quote:
 Originally Posted by ZFR 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?
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).

Last fiddled with by chalsall on 2020-11-24 at 20:30 Reason: s/Contemerious/Contemporaneous/; # Smelling mistake.

 2020-11-24, 21:07 #10 ZFR     Feb 2008 Bray, Ireland 11×13 Posts 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.

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