20120124, 14:36  #1 
"Kieren"
Jul 2011
In My Own Galaxy!
2·3·1,693 Posts 
P1 discussion
Code:
Sending result to server: UID: flashjh/P1Main, M51879281 completed P1, B1=505000, B2=10352500, E=12, We4: 3E947A63 Last fiddled with by kladner on 20120124 at 14:37 
20120124, 20:47  #2 
"Kieren"
Jul 2011
In My Own Galaxy!
27AE_{16} Posts 

20120125, 04:59  #3  
"Jerry"
Nov 2011
Vancouver, WA
1,123 Posts 
Quote:
Last fiddled with by flashjh on 20120125 at 05:00 

20120125, 05:12  #4 
"Kieren"
Jul 2011
In My Own Galaxy!
2·3·1,693 Posts 
Wow! That certainly differs from my circumstances! It gives me a better understanding of how P95 works in the P1 realm.

20120125, 05:18  #5 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
1110000110101_{2} Posts 
In my experience, with 'vanilla' P1 assignments via PrimeNet or GPU272, in stage two there are ~400 relative primes, and for those assignments means about ~10 GiB + 1 would process all at once.
Code:
[Worker #2 Jan 24 22:58:39] Available memory is 3628MB. [Worker #2 Jan 24 22:58:39] Using 3620MB of memory. Processing 143 relative primes (0 of 384 already processed). [Worker #1 Jan 24 22:58:39] Available memory is 4520MB. [Worker #1 Jan 24 22:58:39] Using 4480MB of memory. Processing 41 relative primes (359 of 480 already processed). Code:
[Worker #1 Jan 24 22:58:21] Optimal P1 factoring of M200000033 using up to 10000MB of memory. [Worker #1 Jan 24 22:58:21] Assuming no factors below 2^77 and 2 primality tests saved if a factor is found. [Worker #1 Jan 24 22:58:21] Optimal bounds are B1=1850000, B2=43937500 [Worker #1 Jan 24 22:58:21] Chance of finding a factor is an estimated 4.47% Code:
[Worker #2 Jan 24 22:58:26] Optimal P1 factoring of M54654059 using up to 10000MB of memory. [Worker #2 Jan 24 22:58:26] Assuming no factors below 2^72 and 2 primality tests saved if a factor is found. [Worker #2 Jan 24 22:58:26] Optimal bounds are B1=540000, B2=11610000 [Worker #2 Jan 24 22:58:26] Chance of finding a factor is an estimated 4.12% Edit: 64 GiB is a lot of RAM Last fiddled with by Dubslow on 20120125 at 05:19 
20120125, 05:29  #6  
"Jerry"
Nov 2011
Vancouver, WA
1,123 Posts 
Quote:


20120125, 05:32  #7 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3×29×83 Posts 
How do you get 900 relative primes then? What's your B2/B1 ratio?

20120125, 05:49  #8  
"Jerry"
Nov 2011
Vancouver, WA
1,123 Posts 
Quote:
Code:
[Jan 24 22:43] Setting affinity to run worker on logical CPU #9 [Jan 24 22:43] Optimal P1 factoring of M50521529 using up to 58967MB of memory. [Jan 24 22:43] Assuming no factors below 2^71 and 2 primality tests saved if a factor is found. [Jan 24 22:43] Optimal bounds are B1=525000, B2=11943750 [Jan 24 22:43] Chance of finding a factor is an estimated 4.53% [Jan 24 22:43] Setting affinity to run helper thread 1 on logical CPU #10 [Jan 24 22:43] Setting affinity to run helper thread 2 on logical CPU #11 [Jan 24 22:43] Using Core2 type3 FFT length 2688K, Pass1=896, Pass2=3K, 4 threads [Jan 24 22:43] Setting affinity to run helper thread 3 on logical CPU #12 [Jan 24 22:44] Available memory is 58967MB. [Jan 24 22:44] Using 20779MB of memory. Processing 960 relative primes (0 of 960 already processed). Edit1: Like I said, I've never run an exponent in the 200,XXX,XXX range, I may reserve one just to see the numbers. Edit2: Just to see I reserved a 400,000,000 exponent. I'll post the stage 2 info when the system gets there. Last fiddled with by flashjh on 20120125 at 06:12 

20120125, 14:39  #9 
"Jerry"
Nov 2011
Vancouver, WA
1,123 Posts 
Stage 1, P1 on my machine for 400000000 exponent is ~6.5 days.

20120125, 16:04  #10 
"Kieren"
Jul 2011
In My Own Galaxy!
2×3×1,693 Posts 
Thanks for the examples, Dubslow and Jerry. I had wondered about the number of relative primes, too.
I've been running 4 P95 workers, 3 GB day, 5 GB night. RP's are almost always 192. Typical B1=~520,000 and B2=~10,790,000. Yesterday I changed MaxHighMemWorkers from 3 to 2 to see what difference, if any, that makes. I don't think that change has had time to work through, yet. EDIT: The above are all on GPU272 assignments which range from the mid 40M's to the midtoupper 50M's. Last fiddled with by kladner on 20120125 at 16:07 
20120125, 16:15  #11 
If I May
"Chris Halsall"
Sep 2002
Barbados
10,039 Posts 

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