Bases 33-100 reservations/statuses/primes - Page 31

gd_barnes · 2009-07-24, 09:34

Riesel base 46 is complete to n=25K; 17 k's remain; now unreserved.

Sierp base 46 is complete to n=25K; 30 k's remain; now unreserved.

Sierp base 60 is at n=10K; 50 k's remain; continuing to n=25K.

New reservation: Riesel base 60 for n=10K-25K. I'll sieve and test it concurrently with Sierp base 60. With 131 k's total combined, a lot of efficiency will be gained sieving them both at once.

mdettweiler · 2009-07-24, 15:02

Riesel base 94 is complete to n=100K; results attached for 70K-100K. Releasing.

mdettweiler · 2009-07-28, 22:31

Reserving Riesel base 93 for n=50K-100K.

gd_barnes · 2009-07-29, 03:56

Riesel base 60 is at n=12.5K; 7 primes found for n=10K-12.5K; 74 k's remaining; continuing to n=25K.

Sierp base 60 is at n=13.5K; 8 primes found for n=10K-13.5K; 42 k's remaining; continuing to n=25K.

KEP · 2009-07-30, 14:25

Is taking Sierp base 63 to n=5K, ETA on sieving is sometime tomorrow or the day after tomorrow and after that I'll put 1 core on crunching the NewPGen (ABCD language) file, to n=5K. I expect there to be around 85612 k's remaining at n=5K for Sierp base 63, given the previously stated 37 % reduction is a stable removal of k's per doubleling of n value

Regards

Kenneth

gd_barnes · 2009-07-30, 22:01

That's a good target to go after for that monster base, Kenneth. Good luck!

gd_barnes · 2009-07-30, 22:20

Riesel base 60 is at n=16K; 12 primes found for n=10K-16K; 69 k's remaining; continuing to n=25K.

Sierp base 60 is at n=18K; 11 primes found for n=10K-18K; 39 k's remaining; continuing to n=25K.

Smoking along on one fast core each using the new version of PFGW. The substantially increased speed is great news for this project!

With the faster software, I'll be reserving 3 more Sierp bases and one Riesel base to n=25K as I get close to completing both sides of base 60 to n=25K. It's quite easy searching a base that is likelty to have 50 k's remaining at n=25K on just one fast core.

Gary

mdettweiler · 2009-07-31, 04:03

Just for fun, I tried using PFGW to take the first 5 k's of Riesel base 39 (all of which were at n=1K) and see how many I could knock out. I found three primes:

506*39^1059-1
346*39^1303-1
206*39^1377-1

The remaining two k's of the batch, 474 and 596, are at n=10K. I'll reserve these for n=10K+. Results are attached for n=1K-10K.

gd_barnes · 2009-07-31, 04:39

Quote:

Originally Posted by mdettweiler

Just for fun, I tried using PFGW to take the first 5 k's of Riesel base 39 (all of which were at n=1K) and see how many I could knock out. I found three primes:

506*39^1059-1
346*39^1303-1
206*39^1377-1

The remaining two k's of the batch, 474 and 596, are at n=10K. I'll reserve these for n=10K+. Results are attached for n=1K-10K.

Great! Isn't the faster PFGW awesome? PFGW is my favorite prime testing program anyway because it's so flexible. Now it's even better.

It's been a huge boon to my Sierp base 31 that has ~1600 k's remaining at n=~13.5K right now. The testing time savings on 1600 k's at such a n-depth is rather substantial. The other benefit: The stop on prime. I was previously using Phrot, which was still much faster than LLR or the old PFGW even without the stop on prime. The annoyance was that I had to stop it about every 1000n to remove the k's with primes...a tribulation that I didn't really relish. Now it just runs at break neck speed and I just copy off primes from time to time.

BTW, my time savings on the new PFGW vs. the most up to date Phrot was much less on Sierp base 31 than what most people are experiencing. I was getting about 50% more work done. The tests were coming in at 9 secs. vs. 13.5 secs. [(13.5-9) / 9 = 50%] I suspect that is because I'm testing a low n-range. I think the 2-5 times speed up that people are getting is at high n-ranges.

I dare you to take all 10000+ k's up to n=5K on base 39. lol

mdettweiler · 2009-07-31, 04:52

Quote:

Originally Posted by gd_barnes

Great! Isn't the faster PFGW awesome? PFGW is my favorite prime testing program anyway because it's so flexible. Now it's even better.

It's been a huge boon to my Sierp base 31 that has ~1600 k's remaining at n=~13.5K right now. The testing time savings on 1600 k's at such a n-depth is rather substantial. The other benefit: The stop on prime. I was previously using Phrot, which was still much faster than LLR or the old PFGW even without the stop on prime. The annoyance was that I had to stop it about every 1000n to remove the k's with primes...a tribulation that I didn't really relish. Now it just runs at break neck speed and I just copy off primes from time to time.

BTW, my time savings on the new PFGW vs. the most up to date Phrot was much less on Sierp base 31 than what most people are experiencing. I was getting about 50% more work done. The tests were coming in at 9 secs. vs. 13.5 secs. [(13.5-9) / 9 = 50%] I suspect that is because I'm testing a low n-range. I think the 2-5 times speed up that people are getting is at high n-ranges.

Indeed--the new PFGW is quite handy. Just today I discovered how useful the stop-on-prime option is, compared to Phrot's comparatively simpler stop-on-prime setting which stops the whole program on a prime (not just the k that found the prime).

Previously, the best option for having a k automatically stopped as soon a prime was found on it, without stopping the whole job, was to run a PRPnet server with the worktype set to Sierpinski/Riesel. Of course, that's still an option for when you want to combine the efforts of multiple cores or machines simultaneously, but it's nice to have a simpler option for simpler jobs.

Quote:

I dare you to take all 10000+ k's up to n=5K on base 39. lol

Yes, that's something I considered. Right now I don't think I'll have the resources to spare, though I might take you up on that one sometime in the near future.

KEP · 2009-07-31, 06:28

Thanks Gary, I'm currently constructing the input file, which is going to be an effort that will most likely take approximately 24 hours to complete

So with a little luck, by midnight tonight (local danish time) I'll start hammering out (hopefully) ~145000 k's that this current range will remove if the 37% removal rate is approximately constant. The RAM use by the way, when dealing with 237036 k's going a range from n=1001 to n=5000, is about 1 GB. Well as mentioned earlyer I'll consider if any further approach towards an attack on this base is worth my time and effort, as I reaches n=5K. But I'm just glad that this base may be taken below 100K k's remaining

Take care

Kenneth

2009-07-24, 09:34	#331
gd_barnes May 2007 Kansas; USA 24243₈ Posts	Riesel base 46 is complete to n=25K; 17 k's remain; now unreserved. Sierp base 46 is complete to n=25K; 30 k's remain; now unreserved. Sierp base 60 is at n=10K; 50 k's remain; continuing to n=25K. New reservation: Riesel base 60 for n=10K-25K. I'll sieve and test it concurrently with Sierp base 60. With 131 k's total combined, a lot of efficiency will be gained sieving them both at once. Last fiddled with by gd_barnes on 2009-07-24 at 10:05

2009-07-30, 22:20	#337
gd_barnes May 2007 Kansas; USA 10100010100011₂ Posts	Riesel base 60 is at n=16K; 12 primes found for n=10K-16K; 69 k's remaining; continuing to n=25K. Sierp base 60 is at n=18K; 11 primes found for n=10K-18K; 39 k's remaining; continuing to n=25K. Smoking along on one fast core each using the new version of PFGW. The substantially increased speed is great news for this project! With the faster software, I'll be reserving 3 more Sierp bases and one Riesel base to n=25K as I get close to completing both sides of base 60 to n=25K. It's quite easy searching a base that is likelty to have 50 k's remaining at n=25K on just one fast core. Gary Last fiddled with by gd_barnes on 2009-07-30 at 22:22

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2009-07-28, 22:31	#333
mdettweiler A Sunny Moo Aug 2007 USA (GMT-5) 3·2,083 Posts	Reserving Riesel base 93 for n=50K-100K.

2009-07-29, 03:56	#334
gd_barnes May 2007 Kansas; USA 101×103 Posts	Riesel base 60 is at n=12.5K; 7 primes found for n=10K-12.5K; 74 k's remaining; continuing to n=25K. Sierp base 60 is at n=13.5K; 8 primes found for n=10K-13.5K; 42 k's remaining; continuing to n=25K.

2009-07-30, 14:25	#335
KEP Quasi Admin Thing May 2005 1111000110₂ Posts	Is taking Sierp base 63 to n=5K, ETA on sieving is sometime tomorrow or the day after tomorrow and after that I'll put 1 core on crunching the NewPGen (ABCD language) file, to n=5K. I expect there to be around 85612 k's remaining at n=5K for Sierp base 63, given the previously stated 37 % reduction is a stable removal of k's per doubleling of n value Regards Kenneth

2009-07-30, 22:01	#336
gd_barnes May 2007 Kansas; USA 101×103 Posts	That's a good target to go after for that monster base, Kenneth. Good luck!

2009-07-31, 06:28	#341
KEP Quasi Admin Thing May 2005 2·3·7·23 Posts	Thanks Gary, I'm currently constructing the input file, which is going to be an effort that will most likely take approximately 24 hours to complete So with a little luck, by midnight tonight (local danish time) I'll start hammering out (hopefully) ~145000 k's that this current range will remove if the 37% removal rate is approximately constant. The RAM use by the way, when dealing with 237036 k's going a range from n=1001 to n=5000, is about 1 GB. Well as mentioned earlyer I'll consider if any further approach towards an attack on this base is worth my time and effort, as I reaches n=5K. But I'm just glad that this base may be taken below 100K k's remaining Take care Kenneth