20081207, 02:27  #1 
P90 years forever!
Aug 2002
Yeehaw, FL
7·1,091 Posts 
P1 factoring anyone?
I'll be watching over the next few months how many people sign up for P1 factoring. We have tons of people doing LL and TF, we need more people signing up for P1.
In the new scheme of things, if P1 doesn't get done then when an exponent is assigned to an LL tester he must do the P1, last 2 levels of TF, and then the LL test. If not enough people sign up for P1, I'll have to tweak "do what makes the most sense" to assign some P1 factoring. We have plenty of time to work this out as the leading edge of exponents that need P1 factoring and are holding up TF is above 48 million. It will take a while before the leading edge of LL gets that high. 
20081207, 03:11  #2  
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
19·251 Posts 
Why?
Quote:
The summary also shows almost 34,000 P1 available from 4445M?? What is the preferred hardware for P1? I have my new Q9550, 64 Bit, 4GB RAM. So it would certainly be a fast factoring maching but then it would also be near the upper end in LL performance too. 

20081207, 05:50  #3 
Oct 2008
California
11101100_{2} Posts 
i'll take it up, once i find out the cause of prime95 not assigning p1 work to one of my workers

20081207, 10:20  #4 
"Jacob"
Sep 2006
Brussels, Belgium
11011010000_{2} Posts 
I would like to have the 64 bits version of Prime95 25.8.2 (or later) first. Otherwise I will be wasting 6 GB of RAM. I seem to insist on overworking you in my many communications on different channels ;)
Jacob 
20081207, 13:24  #5  
P90 years forever!
Aug 2002
Yeehaw, FL
7·1,091 Posts 
Quote:
If we have plenty of P1 volunteers, then the P1 assignment happens in a timely manner, and the exponent is assigned for the final two bits of trial factoring. If we don't have many P1 volunteers, when the leading edge of LL testers reaches 51 million the exponent is assigned for LL testing. The LL tester must do the P1, 2 levels of TF, and then the LL test. I'm intentionally assigning P1 exponents that are holding up TF. The 34,000 exponents in 4445M were TFed by the v4 server which did not stop 2 bit levels shy of completing TF. Because of memory bandwidth limitations, consensus seems to be a Q9550 should be doing 3 workers of LL/P1 and 1 worker of TF. If you had one of your 3 LL/P1 workers dedicated entirely to P1 then you would be doing more than your fair share. 

20081207, 18:59  #6 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
1001010100001_{2} Posts 
As S485122 suggested do I not need the 64 Bit Version of Prime95 to go along with my 64 Bit Vista to get the P1 thruput benefit?

20081207, 19:27  #7 
"Nancy"
Aug 2002
Alexandria
2,467 Posts 
Out of curiosity, are you trial factoring residue classes that are more likely to be P1smooth to lower bound than the rest?
Alex 
20081207, 20:34  #8  
"Jacob"
Sep 2006
Brussels, Belgium
6D0_{16} Posts 
Quote:
Jacob 

20081207, 22:20  #9 
P90 years forever!
Aug 2002
Yeehaw, FL
7637_{10} Posts 
There are diminishing returns for extra memory. I suspect anything over 500MB yields very small benefits  but I do not have any benchmarks to back that up.

20081207, 22:20  #10 
P90 years forever!
Aug 2002
Yeehaw, FL
7·1,091 Posts 

20081207, 22:22  #11 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
11241_{8} Posts 
Okay...but isn't it documented that 64Bit OS along with 64Bit Prime95 are faster for factoring? Or is that just for TF and not for P1?
