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Messages 8841 - 8870 of 9804   Oldest  |  < Older  |  Newer >  |  Newest
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8841
Hi, Group. this program won't run when compiled as $scriptify.pl <bouris.pcs> bouris.scr ...am I missing something ??? SCRIPT // DIM L,3; DIM M,2^3; DIM...
leavemsg1
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Dec 2, 2007
11:42 pm
8842
I think I have fixed it. The comments explain what I did. NOTE the output is: Script File L=3,N=1 L=3,N=3 COMPOSITE COMPOSITE Is that what you expected? Jim....
jim_fougeron
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Dec 3, 2007
12:01 am
8843
Thanks, Jim... the output is correct. I wouldn't have got it without your help; my syntax was horrible. ... the ... alone ... formatting. ... outside ... ...
leavemsg1
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Dec 4, 2007
4:54 pm
8844
// Jim, alas... int iL=3; int M=2^3; int Z1; int Z2; int Z3; int Z4; int Z5; int Z6; int Z7; int Z8; for(N=1;N<=M;N+=2){ Z1=M*(M+N)+1; Z2=(((Z1-3)/2-1)/2-1)/2;...
leavemsg1
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Dec 5, 2007
2:19 pm
8845
Hi All. I've been using primeform for awhile and though I would see if there was a newer version and stumbled upon PFGW. I was curious to see how well it...
David Jones
davypi
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Dec 26, 2007
7:05 pm
8846
A lot more info is good for comparisons. Which primeform version? Which PFGW version? Which cpu? Were they running at normal cpu priority with no other cpu...
Jens Kruse Andersen
jkand71
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Dec 26, 2007
8:00 pm
8847
I created this file: ABC2 (10^$a-1)/11 a: from 1 to 2500 and ran it using the command: pfgw -f test.in > stdout.io 2> stderr.io This finished in about .5s on...
jim_fougeron
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Dec 27, 2007
3:53 pm
8848
... Primeform verision 0.4 PFGW is the current version on the main page. CPU is a P4 2.8G and I had all other jobs shut down while running the test. ... ...
David Jones
davypi
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Dec 27, 2007
4:10 pm
8849
... Couldn't it be caused by the processor being dualcore / hyperthreading / appearing as two separate CPUs from the OS point of view for some other reason? If...
Peter Kosinar
pkosinar
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Dec 27, 2007
4:17 pm
8850
If I may share my experience. Using multiple CPUs... CPU0 does not get the OS load placed on it, CPU1 does. So CPU0 is 100% free to run the heavy jobs. The...
Chuck Lasher
lasher_chuck
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Dec 27, 2007
5:47 pm
8851
... You must have a dual core CPU. If so, PFGW (and or primeform), will only use at most 1/2 of the CPU. On many of the "better" dual core systems, you can...
jim_fougeron
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Dec 28, 2007
12:03 am
8852
... Oh, that is very impressive. Congrats to Norman; only 1 ECPP to do. David...
David Broadhurst
djbroadhurst
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Dec 28, 2007
5:44 pm
8853
Just an update: I reran the test using (10^(2*$a+1)+1)/11 with a from 1 to 1250. (The minus one in first post was a typo.) Primeform took 4:20 while PFGW ...
David Jones
davypi
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Dec 28, 2007
7:03 pm
8854
... Make two DOS windows, each running PFGW from a different folder, the first with exponent (2*$a+1) and the other with (2*$a+3) stepping $a by 2 in each ...
Lélio
lelio_73
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Dec 29, 2007
5:50 am
8855
I reran the test using (10^(2*$a+1)+1)/11 with a from 1 to 1250. (The ... Make two DOS windows, each running PFGW from a different folder, the first with...
Lélio
lelio_73
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Dec 29, 2007
5:50 am
8856
The PrimeGrid prime http://primes.utm.edu/primes/page.php?id=83407 is very impressive. Looking at ...
David Broadhurst
djbroadhurst
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Dec 29, 2007
6:39 am
8857
David, I have found this prime MYSELF after reserving a MANUAL range over @ mersenneforum.org.(http://mersenneforum.org/showthread.php?t=8137) Outside of the...
darkangel55us
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Dec 29, 2007
7:12 pm
8858
Hello, I have make same GCD per hand and found this. Take a n where a^n=a mod n , is n now a true prime ? I searched for small factor of n-1. k is factor of...
Norman Luhn
nluhn
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Dec 30, 2007
6:38 pm
8859
Hm... I try the carm. number n=(12936*10^329-59827428149)*(14784*10^329-68374203599)* (20328 *10^329-94014529949) for 103 , a factor of n-1 I get...
Norman Luhn
nluhn
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Dec 30, 2007
7:30 pm
8860
The following result 809504830479349+208*19#*n, n=0...20 (Pawel Nowak, Jaroslaw Wroblewski, December 31, 2007) improves the AP21 minimal difference (2681*19#)...
jarek372000
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Dec 31, 2007
12:38 pm
8861
... I patched the hole with the "Lucas V" method by insisting on a Euler probable prime test: 5^((n-1)/2)=jacobi(5,n). Both the above "counterexamples" happen...
Paul Underwood
paulunderwooduk
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Jan 1, 2008
1:25 pm
8862
Hi, Re: David's http://tech.groups.yahoo.com/group/primeform/message/7338 firstly, some local notation: "+-" and "-+" is used throughout in a conjunctively...
Paul Underwood
paulunderwooduk
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Jan 1, 2008
1:31 pm
8863
... A small change, for clarity: 3.) find Q: 2<=Q<=(n-1)/2 and jacobi(1-+4*Q,n)==-1 Paul...
Paul Underwood
paulunderwooduk
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Jan 1, 2008
3:22 pm
8864
The university I work at has a few big clusters of computers that I've been given permission to run prime programs (mainly llr, but also pfgw) on, and they are...
jbohanon3
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Jan 1, 2008
4:29 pm
8865
hi Joe, The videocard manufacturers are competing with each other. If company A says they can do 1 teraflop a second, then company B will say they can do 1...
Vincent Diepeveen
diepchess
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Jan 1, 2008
5:19 pm
8866
I don't have much information about the price as I'm not the one buying it. I'll have to get back to you on just how much better computing works on the card....
jbohanon3
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Jan 1, 2008
11:52 pm
8867
I wouldn't say it like that Joe, It certainly isn't easy to get a good FFT going in 32 bits. It is very well possible that if your FFT is 1 GB huge and just...
Vincent Diepeveen
diepchess
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Jan 2, 2008
12:45 pm
8868
Correction: i meant of course the videocard has ddr3 ram. Small typo....
Vincent Diepeveen
diepchess
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Jan 2, 2008
12:45 pm
8869
Of course Joe, i posted a lowerbound. In reality there is the overhead of FFT which is for DWT like 4n + 2n log n Fact is that if the internal cache subsystem...
Vincent Diepeveen
diepchess
Online Now Send Email
Jan 2, 2008
12:45 pm
8870
Cedric Vonck wrote ... which had nothing to do with my comment on the prime to which I had carefully referred, in ...
David Broadhurst
djbroadhurst
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Jan 3, 2008
2:20 am
Messages 8841 - 8870 of 9804   Oldest  |  < Older  |  Newer >  |  Newest
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