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Old 2011-01-23, 05:34   #1013
Puzzle-Peter
 
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I am at n=10K now, two more primes:

101*698^6886-1
53*698^7304-1

Now for some more sieving...
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Old 2011-01-23, 06:28   #1014
gd_barnes
 
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Quote:
Originally Posted by Mattyp101 View Post
I'm new to CRUS, so please tell me if I'm doing anything wrong.

Reserving S1029 n=100k-150k

Welcome to CRUS Mattyp! As long as you are aware that your reservations will take several CPU months, it seems fine to us. You can use srsieve followed by sr1sieve for sieving and either PFGW or LLR for testing.

If you have any questions, please let us know.

Good luck!

Last fiddled with by gd_barnes on 2011-01-23 at 06:30
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Old 2011-01-23, 10:17   #1015
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Default S1017

Sierp Base 1017
Conjectured k = 1494
Covering Set = 7, 13, 31
Trivial Factors k == 1 mod 2(2) and k == 126 mod 127(127)

Found Primes: 717k's - File emailed

Remaining: 23k's - Tested to n=25K - File emailed

Trivial Factor Eliminations: 6k's

Base Released
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Old 2011-01-23, 10:33   #1016
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Quote:
I'm new to CRUS, so please tell me if I'm doing anything wrong.

Reserving S1029 n=100k-150k
Welcome aboard. Nice choice for a first reservation.
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Old 2011-01-23, 12:46   #1017
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Welcome aboard. Nice choice for a first reservation.
Why thank you.

I'm also going to take all 13 k's of S1021 for n=25K-100K
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Old 2011-01-23, 12:48   #1018
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Quote:
Originally Posted by Mattyp101 View Post
Why thank you.

I'm also going to take all 13 k's of S1021 for n=25K-100K
Mostly out of curiosity: How many cores do you have? How many cores are you planning to put towards the two things you've reserved? Looks like a whole lot of work to me, but I know how some people have dozens or hundreds of cores at their command.
By the way, in case you're not familiar with it, such a range (i.e. >2 k's) would be best sieved by srsieve to start (if the sieve wasn't started already) and then sr2sieve for the sieving (for 1 or 2 k's, sr1sieve is usually best). Between running srsieve and sr2sieve, (or at any time, really) you might also want to run this hiddenpowers script (be sure to read the documentation and note the sieve file must be NewPGen-like, i.e. each line being like "k n") to remove some numbers that have algebraic factors and can't be prime.

Last fiddled with by Mini-Geek on 2011-01-23 at 12:58
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Old 2011-01-23, 13:08   #1019
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I have a quad core, at 3.4 GHz, running 24/7, but could put on an extra 4 if it comes to it. By my estimates (very rough estimates), the multi k range will take around two months, possibly less if I find many factors. Thanks for the tip about the script. Wouldn't the factors just be found by one of the sieving programs anyway?
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Old 2011-01-23, 13:17   #1020
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Quote:
Originally Posted by Mattyp101 View Post
Thanks for the tip about the script. Wouldn't the factors just be found by one of the sieving programs anyway?
No, because the factorizations found are often a significant fraction of the size of the number, whereas the sieve depth is a tiny portion of it.
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Old 2011-01-23, 19:05   #1021
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As a rough estimate, I would say that your 2 efforts combined will take ~1 CPU year (possibly longer) or ~3 months on a quad running 24x7. These larger bases take much longer at the same n-range than much smaller bases.

Tim, since he is running the Sierp side, there are unlikely to be any k's where algebraic factors can remove some of the n's. The only small exception, since neither base is a perfect cube or higher power, would be if any of the k's were a perfect cube or higher power (upon a quick glance, I don't see any). Personally I wouldn't suggest that he mess with it until he's run the conjectures a little more.

Mattyp, one hint that I always give new people: It's very easy to reserve way too much and then get bored before the effort is done. Please do not bite off more than you can chew. It's better to start out small and work your way up to larger reservations. I'm not making a judgment as to whether yours is too large; it's just a little friendly advice. :-)

Last fiddled with by gd_barnes on 2011-01-23 at 19:24
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Old 2011-01-23, 19:52   #1022
Mattyp101
 
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Quote:
As a rough estimate, I would say that your 2 efforts combined will take ~1 CPU year (possibly longer) or ~3 months on a quad running 24x7. These larger bases take much longer at the same n-range than much smaller bases.
You know what, you may be right there . Now that it's been running for a little while, it's looking like it might take a fair but longer than I thought. I probably could manage it all, but I like to move around a little. So, with that in mind, I would like to half the max n of both my reservations. That is:

S1029, n=100K-125K, and
S1021, n=25K-50K.
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Old 2011-01-23, 21:18   #1023
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Quote:
Originally Posted by Mattyp101 View Post
You know what, you may be right there . Now that it's been running for a little while, it's looking like it might take a fair but longer than I thought. I probably could manage it all, but I like to move around a little. So, with that in mind, I would like to half the max n of both my reservations. That is:

S1029, n=100K-125K, and
S1021, n=25K-50K.
Ah, that sounds quite manageable for a quad and allows to get your feet wet without a large commitment at this point. If you want to start out sieving larger ranges and extend your reservation later on, that would work well.
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