Hi, Group; and Paul Underwood. '2nd-kind' Proth number classification (as described by me); this number won't generate psuedoprimes when tested base two. ...
... see: http://primes.utm.edu/glossary/page.php?sort=StrongPRP and: http://mathworld.wolfram.com/Iff.html You did not use "12.4999... % of the number of...
Hi all, Third time lucky 2^5900 + 469721931951 2^5900 + 469721934831 2^5900 + 469721937711 2^5900 + 469721940591 form a CPAP4 each with 1777 digits and...
Hi All! I actually try to find the most suitable journal to publish a paper intitulated: "Toward a ultimated and unified theory of factorization of Cunningham...
... Virtually no journal will publish a conjecture alone. Usually conjectures are buried in the midst of theorems and proofs, or shared in informal ways. CC...
Thank for your answer Chris, but unfortunately it doesn't help me. I have a lot of material (a small set of conjectures all based on a basic one). As I said my...
Posted by: "Sean A. Irvine" ... Erm, that's trivial. The first divides 2^4770873414614514823726411765367314130342678121207508100045009-1 Phil () ASCII ribbon...
Hi Sean, Right now it's difficult to say (probably not) if my conjectures could speed up the search of factors of Cunningham numbers, but who knows? I think my...
Hello group, today, I found a new (possible) triplet with 6223 digits (>20000 bits). Primo v2.2.0_b7 is running. After very long time I found this: ...
Thank you,Jens! A question to you: What is the running time for a 6.2k digit number ? My calculation is 3 or 4 months on a 2.133 Ghz Athlon MP. After 3 days I...
I was wondering how the conversion was done. From a regular 2357207 digit number to 28433·2^7830457+1. I am thinking it is called Scientific notation but i...
... The number is written 28433*2^7830457+1 in ASCII and it is the 9th largest known prime: http://primes.utm.edu/primes/page.php?id=73145 * and + are normal...
Hi, Group. this program won't run when compiled as $scriptify.pl <bouris.pcs> bouris.scr ...am I missing something ??? SCRIPT // DIM L,3; DIM M,2^3; DIM...
I think I have fixed it. The comments explain what I did. NOTE the output is: Script File L=3,N=1 L=3,N=3 COMPOSITE COMPOSITE Is that what you expected? Jim....
Thanks, Jim... the output is correct. I wouldn't have got it without your help; my syntax was horrible. ... the ... alone ... formatting. ... outside ... ...
// Jim, alas... int iL=3; int M=2^3; int Z1; int Z2; int Z3; int Z4; int Z5; int Z6; int Z7; int Z8; for(N=1;N<=M;N+=2){ Z1=M*(M+N)+1; Z2=(((Z1-3)/2-1)/2-1)/2;...
Hi All. I've been using primeform for awhile and though I would see if there was a newer version and stumbled upon PFGW. I was curious to see how well it...
A lot more info is good for comparisons. Which primeform version? Which PFGW version? Which cpu? Were they running at normal cpu priority with no other cpu...
I created this file: ABC2 (10^$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...
... 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. ... ...
... 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...
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...
... 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...
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