20050410, 13:10  #45 
"Curtis"
Feb 2005
Riverside, CA
4,243 Posts 
Proth appears to cap k at 2^31, and when I run LLR on the output file from NewPGen, it only spits back the first line of the input file. What am I doing wrong?
Separate question: I remembered reading something about it being faster to just LLR small n's, rather than sieving them; I pulled the small n out of the sieve, then restarted it. It appears to have restarted sieving at p=2, even though the top line of the file showed p=2 billion (roughly) at last save. Is there some paramater to alter when you pull part of a sieve file to prevent it starting over? Finally, can I force LLR to test primality (PRP, I think, since k>2^n) for the really small cases of n? Say, less than 1500. I tried Proth for this, discovering the apparent 2^31 limit. Am I just better off picking a k smaller than 2^31 and restarting? Curtis 
20050410, 15:02  #46  
Sep 2002
262_{10} Posts 
Quote:
Code:
ABC 3*5*11*11*13*331*487*2^$b1 //NewPGen:1000000:M:0:2:322 1 2 1 3 1 4 ... It should look like this Code:
1000000:M:0:2:258 3803443215 2 3803443215 3 3803443215 4 ... Quote:


20050411, 19:58  #47 
"Curtis"
Feb 2005
Riverside, CA
4,243 Posts 
Thanks! Everything runs great. It seems my sieve started over because I left a blank line between the top line and the list of exponents; I deleted that space, and it resumed where I left off.
I've run to about n=40,000, with roughly 40 primes. I'll post them once I hit n=100k. Curtis 
20050717, 16:42  #48 
Nov 2003
2·1,811 Posts 
I did some updates to the table of 15k Primes. It's still incomplete but it's a little bit better than before. I hope Joss will be back soon with a full update. I have two questions:
1) To VBCurtis: k=3803443215, have you checked the 178053194673 interval and if so have you found any new primes? What limit in terms of n have you reached? 2) To lsoule: k=8331405, have you checked the 45773186251 interval and if so have you found any new primes? Thanks! Last fiddled with by Kosmaj on 20050717 at 17:07 
20050717, 20:43  #49 
"Curtis"
Feb 2005
Riverside, CA
4243_{10} Posts 
Weird.. I go 30 days without checking the board, and the day I reappear, there's a question for me.
I have checked k=3903443215 to n=275k, including the range you asked about, with no further primes to report. I've been focusing my efforts on the lowweight numbers, but plan to eventually run this k to n=500k. I'll post an update on the lowweight numbers shortly. Curtis 
20050718, 04:29  #50  
Nov 2004
California
3250_{8} Posts 
Quote:
I do have a sieve file (sieved only to 17B with 20k candidates) if anyone wants it. thanks, Larry 

20050718, 14:17  #51 
Nov 2003
3622_{10} Posts 
Curtis and Larry,
Thanks for your quick replies. I added your info and I also added all small primes reported in the Post small primes thread. I updated k=25935 with its 66 small primes n<10k. k=25935 was tested by Thomas Ritschel from about n=100k (?) to 200k, then rediscovered by Larry and tested by me from 200k to 220k. But I just found that two primes for n=46144 and 47396 had been found and reported back in 2000 to Top5000 by g174 (T.J. Engelsma). k=25935(=3*5*7*13*19) looks promising but for large n's one has to be patient. Please let me know if you find any typos, inconsistencies, etc. Last fiddled with by Kosmaj on 20050718 at 14:19 
20050824, 17:48  #52 
May 2005
2·809 Posts 
I will give a try to 736320585...
Since this is my first candidate, do you have any suggestions for newpgen/LLR other than those already in the forums? BTW: Is it possible to force CPU affinity in newpgen? Last fiddled with by Cruelty on 20050824 at 18:03 
20050825, 03:23  #53 
Nov 2003
2·1,811 Posts 
Cruelty
No special tips, just be patient and sieve for a while before starting LLR. It's hard to give concrete advice but for example for n=200500k sieve at least for 48 hours or to 500bn whatever comes first. It is possible to force cpu affinity (I assume it's a dual box, unless you have those cool 4way?) using Task Manager (in Windows) but I never do that. This can also degrade performance, try it but check the speed. I just found by searching Top5000 that this k was checked by Herranen back in 199899 most likely to n=70k. Looks good, there is a SophieGermain prime 736320585*2^61941. VBCurtis I'm sorry about that. Joss marked some k's in the lowweight table as being reserved by "Riesel sieve" but obviously he missed this one. Please check their site next time. 
20050825, 07:57  #54  
May 2005
11001010010_{2} Posts 
Quote:
As for the PC I'm using for "15k" it's a Dualcore Athlon 64 @ 2,55GHz Last fiddled with by Cruelty on 20050825 at 08:00 

20050825, 16:25  #55 
Mar 2004
Belgium
1101000101_{2} Posts 
Rereserving 13236795 from 340k....
Cedric Vonck 