20050922, 08:33  #45 
Feb 2003
1,901 Posts 
This is just a status update.
The following 23 k have been testet to n=2M now. No new primes found so far... 19370947 59910449 80857169 143316643 162405629 175437131 189030223 203012861 209826493 224371169 243163663 245265883 248690527 260213857 265831619 276278983 290851087 298095191 300871183 308120317 308141737 315940139 326840893  Thomas 
20050922, 18:18  #46 
"Curtis"
Feb 2005
Riverside, CA
4006_{10} Posts 
Thanks, Thomas I was really hoping you'd weigh in with your research soon. I'll try to get those updates on the stats page soon. How far did you sieve these very lowweight candidates? I have two numbers similar in weight to the candidates you chose; it seems 4T is sufficient (plenty, even) for running to 2 million. Did you sieve deeper, and why?
Kosmaj: I noticed Joss' work on 403993 after posting that reservation, so I grabbed the sieve file and plan to finish to 500k,which I admit isn't the best time trial for my suggestion. That said, my P3550 has sieved from 35G to 110G in 20 hrs, so sieving for 1 day on a normal machine is sufficient to prepare LLRing to 500k; I'm still removing candidates at nearly one per hour, so I'll sieve to 150 or 200G before LLRing the 403500k range. 
20050923, 01:19  #47 
Jun 2003
3×503 Posts 
I guess you guys are right, Why 100k? I just thought a low n peak estimate would be good, like you use n=5000 for 15k.
Anyway, I will not be working on these low k's because I tested LLR 3.62 and k<70 is twice as fast as compared to k>2000. Hence I see no point in working on k's greater than 70. Thanks, Citrix 
20050923, 05:45  #48 
"Curtis"
Feb 2005
Riverside, CA
2×2,003 Posts 
Gribozavr:
My sievingdepth notes don't make as much sense now as they did in July, but my estimate is at p=1.5T, you're finding a factor about once every 2 hrs 10 min, with the efficiency cutoff at about 2 hrs 20 min. Thus, you've stopped sieving at almost exactly the right point for your chosen kvalue. If you have recent data about how often factors are found, I'd like to hear how good my estimate is. factors are not smoothly distributed, so anything from 2 hrs up to 2 1/2 hrs per factor in NewPGen will make me think my guesswork is accurate. Curtis 
20050923, 06:14  #49  
Jun 2003
3·503 Posts 
Quote:
Citrix 

20050923, 08:59  #50 
Feb 2003
1,901 Posts 
VBCurtis:
The values of k I'm working on are all sieved to pmax=12T yet, with nmax=10M. If you want to do n=0...2M, then pmax=4T should be quite sufficient. One could also think of using SBFactor to do some P1 factoring on candidates with n>1M. I did some trials but found the sieving still more efficient. Maybe SBFactor will get another chance at even larger values of n.  Thomas 
20050923, 17:51  #52  
Jun 2003
1509_{10} Posts 
Quote:
Thanks for pointing it out to me. I have reserved the k from 1.8M onwards at prothsearch.net and plan to take it to 5M. Since this is the only k I am woking on, I think I can do that alone. Other than that the k is low wt and I really don't care any more about finding small primes. I want to find a prime that makes it to the top 10 list. Since with the few resources I have, the only way to do so is to gamble with a low wt k. Just hoping there is a prime for the k=47. I hope I am lucky. edit:  I also checked on prothsearch.net, 'Nohara' has not reserved anything on prothsearch.net with n>1.8M , so I guess I am free to work on this k. Thanks, Citrix Last fiddled with by Citrix on 20050923 at 18:01 

20050923, 19:15  #53  
Mar 2005
Internet; Ukraine, Kiev
11×37 Posts 
Quote:
Just an update: now I'm LLR'ing n=537154, time per iteration = 7.108 ms. 

20050923, 22:23  #54 
Jun 2004
152_{8} Posts 
I'm currently working a bit on k=27791 and k=10813783. I will bring the k=10813783 to 1M, since it has only 550 n's left to test.
k=27791 has been tested until n=214k k=10813783 has been tested until 315k Both without new primes. 
20050925, 19:16  #55 
May 2004
2^{2}·7 Posts 
Working on 23437 and 11955659 ;)

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