Doublecheck drive #1: k=3-1001 n=100K-260K

[mdettweiler]

Originally Posted by Flatlander

15 to 19 completed.
No surprises.

Total running time on one core of C2D @ 2925 MHz was c. 7 days 10 hrs.

I've emailed the zipped results because they exceed the 244.1kb limit.

Originally Posted by Mini-Geek

9-13 Done. Results and primes attached. It had trouble writing to the lresults.txt file for a little bit there and put it in the other file in the archive.
Edit: Oh yeah, and, no surprises here. All and only all primes known.

Thanks, guys, for being on top of all the primes in your ranges! Saves a bunch of work on my part.

@Mini-Geek: Hmm, that's weird, I've never seen LLR do that before. Maybe some file locking contention, or something like that? Oh well, as long as we've still got the results, all's fine.

[Flatlander]

Originally Posted by Mini-Geek

How many candidates were in your range? How much was the CPU used? Reason is to compare speed with my A64X2 @ 2500 MHz. It will finish 9-13 within 35 minutes. I had a power outage and fell ~7.5 hours behind. Estimated CPU time is 204 hours (8.5 days), note this is a rather rough estimate as I couldn't grab the CPU time just before the power outage. Real time is about about 8.75 days (234 hours).

There were 22627 candidates. CPU usage was >99%.

[henryzz]

how long would 1 low weight k take

i am looking for some work to do after i have finished my current gnfs factorization
do u have any suggestiopns of what i could do for nlpb with work units that take about 24 hours

[Mini-Geek]

Originally Posted by henryzz

how long would 1 low weight k take

i am looking for some work to do after i have finished my current gnfs factorization
do u have any suggestiopns of what i could do for nlpb with work units that take about 24 hours

Three low weight k's took my CPU about 9 days, so even 1 low weight k would probably be longer than that.
If LLRnet is an option, that would work. http://www.mersenneforum.org/showthread.php?t=10042
I don't think NPLB has any other work units that small, except extreme divisions like a n=50 or less of a Drive 1 range.

[mdettweiler]

Originally Posted by henryzz

how long would 1 low weight k take

i am looking for some work to do after i have finished my current gnfs factorization
do u have any suggestiopns of what i could do for nlpb with work units that take about 24 hours

Yeah, as Mini-Geek said, LLRnet is pretty much the only option for chunks of work that small. However, for NPLB's sister project, Conjectures 'R Us, we have a Sierpinski Base 6 team sieve for which you can get reservations of just about any size. How big a range you'd want to get will depend on what kind of machine you have. For my Core 2 Duo 2.2Ghz, 24 hours on one core means roughly 45-50G.

[mdettweiler]

401-405 complete, no errors found.

[Mini-Geek]

3-7 is complete. No surprises. lresults.txt emailed to Anon.

[gd_barnes]

407-411 and 413-417 double-check ranges are complete.

I haven't had time to check the primes nor put the results together from a personal LLRnet server that I was running from it. It'll have to wait until I get back from a trip to Atlantic City that I'll be back from on the 28th.

I'll still be in the forums once/day.


Gary

[kar_bon]

k=21-25 complete, no new/missing primes.
results sent to Anon

[gd_barnes]

Originally Posted by gd_barnes

407-411 and 413-417 double-check ranges are complete.

I haven't had time to check the primes nor put the results together from a personal LLRnet server that I was running from it. It'll have to wait until I get back from a trip to Atlantic City that I'll be back from on the 28th.

I'll still be in the forums once/day.


Gary

k=407-411 and 413-417 primes and results have been processed, sent to Anon, and checked against the Rieselprime.org page and the Primesearch site. No problems found.


Gary

[gd_barnes]

Once thing that I forgot to mention: Please be sure and check your found primes vs. the [URL="http://www.myjavaserver.com/~primesearch/primes.jsp?view=all"]Primesearch site primes[/URL] also.
(kar_bon: That site is not available anymore!)

This is in addition to comparing them to my k<300 page and Karsten's 300<k<2000 page.

I mention this because in checking Primesearch vs. the k<300 and 300<k<2000 pages, I found the following primes that were missing from Primesearch for ranges that we have double-checked, all of which Karsten just recently noted on 300<k<2000 as having been missing there (i.e. he showed them missing well after this double-check effort for the corresponding k's).

405*2^104462-1
405*2^109496-1
405*2^193516-1


Thanks,
Gary