mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Data > Marin's Mersenne-aries

Reply
 
Thread Tools
Old 2021-09-25, 08:45   #12
tuckerkao
 
"Tucker Kao"
Jan 2020
Head Base M168202123

7508 Posts
Default

Quote:
Originally Posted by Zhangrc View Post
Me too, that doesn't hurt your throughput. Would you like to help with some wavefront TF?
Not until I get a new PC because it'll take too long to finish them. Would be more efficient to just run the PRPs on my current machine.

Since SRBase is the group that will take the advantage on the higher TF depths, it should definitely be the assignments of that group which you've just mentioned they need more works to do.

Last fiddled with by tuckerkao on 2021-09-25 at 08:49
tuckerkao is offline   Reply With Quote
Old 2021-09-25, 08:51   #13
Zhangrc
 
"University student"
May 2021
Beijing, China

103 Posts
Default

Quote:
Originally Posted by tuckerkao View Post
Not until I get a new PC because it'll take too long to finish them.
How long exactly?
For me, TF from 2^76 to 2^77 takes 3 hours while PRP and P-1 takes 11 to 12 days. It still make sense to TF to 2^77.
Zhangrc is offline   Reply With Quote
Old 2021-09-25, 08:54   #14
tuckerkao
 
"Tucker Kao"
Jan 2020
Head Base M168202123

1E816 Posts
Default

Quote:
Originally Posted by Zhangrc View Post
How long exactly?
For me, TF from 2^76 to 2^77 takes 3 hours while PRP and P-1 takes 11 to 12 days. It still make sense to TF to 2^77.
On my current machine, It'll take me 11 hours to TF from 2^76 to 2^77 for M115M, P-1 takes 8 hours, PRP takes around 12 days.

I have some cooling problems with my current GPU, it has to rest from time to time, the reason why I want to buy a new machine.

Too bad DrKirkby quit GIMPS, he prefers the wavefront exponents and has a lot of memories capable of running large amount of P-1 factoring.

I'll finish the P-1 which shows the details on the attached image below. If no one takes that exponent within a week, I probably won't run more.
Attached Thumbnails
Click image for larger version

Name:	M115173323.png
Views:	29
Size:	61.7 KB
ID:	25755  

Last fiddled with by tuckerkao on 2021-09-25 at 09:16
tuckerkao is offline   Reply With Quote
Old 2021-09-25, 12:25   #15
tuckerkao
 
"Tucker Kao"
Jan 2020
Head Base M168202123

23×61 Posts
Default

M115173323 has a factor: 64115403008215858576973359

The same F-PM1 fate as M168173323, interestingly both have a factor in the 2^80+ bits.

I don't need to run TF 2^76 to 2^77, that's almost certain no factor within that bit.

Last fiddled with by tuckerkao on 2021-09-25 at 12:48
tuckerkao is offline   Reply With Quote
Old 2021-09-25, 15:38   #16
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

22×41×61 Posts
Default

Quote:
Originally Posted by Zhangrc View Post
Nowadays people mainly do trial factoring in the two-k project (which I have very little interest), and GPU72 is releasing TF assignments to 2^76 and seems very reluctant to give any higher bounds. However, there are hundreds of thousands of unfactored exponents in the 107-119M range

So I suggest doing trial factoring to higher than 2^77, starting from 107M. My reasons are as follows:
  1. You can do TF beyond what GPU72 hands out. Get the assignment, edit the work todo, don't turn in the results until you turn in all of your TF
  2. You can 'freelance' the TF after GPU72 has released the exponent.
  3. mersenne.ca shows that 76 is the highest recommended level for that range (based upon how long it takes a GPU to do the TF vs the PRP.
  4. It might be most profitable to do P-1 before the last bit(s) of the TF. There is overlap in what P-1 might find and what TF will find.
  5. Many people are trying to help maximize the total speed of the project. Once an exponent is factored to the break even point (including P-1), it makes the most sense for the project to do the PRP.
Uncwilly is offline   Reply With Quote
Old 2021-09-25, 15:41   #17
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

22·41·61 Posts
Default

Quote:
Originally Posted by tuckerkao View Post
then ask the SRBase group to run every exponents up to 2^77 or 2^78.
You obviously haven't been following the discussion in the threads about SRBase's TF work. The plan has been doing breadth first TF. There have been discussion to try to change that to work near the wave front, but that is not in the (GPU)cards.
Uncwilly is offline   Reply With Quote
Old 2021-09-26, 07:38   #18
tuckerkao
 
"Tucker Kao"
Jan 2020
Head Base M168202123

23×61 Posts
Default

Quote:
Originally Posted by Zhangrc View Post
How long exactly?
For me, TF from 2^76 to 2^77 takes 3 hours while PRP and P-1 takes 11 to 12 days. It still make sense to TF to 2^77.
I just learned that Intel Core i9 12900k will launch on Nov 19, 2021 with a probable retail price of $604.

If I pair it up with Nvidia Geforce 3060 Ti, the total price of the new PC shouldn't be exceed $2000. It'll be nice to have the new DDR5 memories and PCIe5 which shouldn't be less powerful than DrKirkby's machines.

Trial factoring of 2^76 to 2^77 of M115M will only take around 1 and half an hour on Nvidia Geforce 3060 Ti.

I figured that 2 of such PCs together will generate more total outputs than 1 $4000 AMD Threadripper 5970X PC with Nvidia Geforce 3080 Ti.

A lot of things can change during the meantime, I cannot make the final decision until I see the detailed descriptions of the available products.

Last fiddled with by tuckerkao on 2021-09-26 at 07:41
tuckerkao is offline   Reply With Quote
Old 2021-10-01, 22:21   #19
tuckerkao
 
"Tucker Kao"
Jan 2020
Head Base M168202123

1111010002 Posts
Default

M106489771 served as a great example that a factor between 2^76 to 2^77 could be found through P-1.

Consider the chance of a P-1 finding a new factor is around 4x of a TF from 2^76 to 2^77, however the P-1 only takes slightly longer than the TF, as far as I understand that Kriesel is able to finish both of those within an hour and a half.

The 4x chance is a reality because digging out new factors between 2^77 to 2^100 have been quite frequent even using the standard bounds.

Last fiddled with by tuckerkao on 2021-10-01 at 22:30
tuckerkao is offline   Reply With Quote
Old 2021-10-03, 14:36   #20
tuckerkao
 
"Tucker Kao"
Jan 2020
Head Base M168202123

7508 Posts
Default

Quote:
Originally Posted by Zhangrc View Post
How long exactly?
For me, TF from 2^76 to 2^77 takes 3 hours while PRP and P-1 takes 11 to 12 days. It still make sense to TF to 2^77.
You don't have to run P-1 and PRP together. If F-PM1, then don't run the PRP.

UncWilly has been correct, it's better to run P-1 on my CPU first while my GPU aiming another exponent, M168607223 has a factor between 2^77 to 2^78 which was found by P-1.

Running P-1 will be able to collect most of the low hanging fruits. If no harvests, then target the TF 1 bit higher than the GPU72 recommended level.

Last fiddled with by tuckerkao on 2021-10-03 at 14:41
tuckerkao is offline   Reply With Quote
Old 2021-10-19, 14:27   #21
Zhangrc
 
"University student"
May 2021
Beijing, China

103 Posts
Default

M108398111 has a factor: 127634018463172816320049

The 108.3M have 2096 unfactored exponents. If F-PM1 probability stays around 4% we might still have ~2020 exponents. I suggest we should do some TF and P-1 now before it becomes too late.
Anyone like to help?

Last fiddled with by Zhangrc on 2021-10-19 at 14:29
Zhangrc is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Trial Factoring on AMD/ATI GPU's? Stargate38 GPU Computing 9 2018-08-31 07:58
What is Trial Factoring? Unregistered Information & Answers 5 2012-08-02 03:47
How far to do trial factoring S485122 PrimeNet 1 2007-09-06 00:52
over trial factoring JFB Software 23 2004-08-22 05:37
How to only do Trial Factoring? michael Software 23 2004-01-06 08:54

All times are UTC. The time now is 08:21.


Wed Oct 20 08:21:49 UTC 2021 up 89 days, 2:50, 0 users, load averages: 3.60, 3.30, 2.92

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.