20080808, 15:16  #34  
Quasi Admin Thing
May 2005
2^{2}·241 Posts 
Quote:
Thanks for all your patience! KEP! Ps. I expect (before removal of "redundant" k's) to end up with approximately 2,900 k's remaining at n<=25K for k<=500M. Which again will have us end up with approximately 365,400 k's remaining at n<=25K! How you decide to get to n<=25K, I'll let you decide, but I've mapped a plan to Gary that you can feel free to follow or discard as useless if something else occurs as more obvious and as being faster Last fiddled with by KEP on 20080808 at 15:22 

20080905, 22:13  #35  
Quasi Admin Thing
May 2005
2^{2}×241 Posts 
Quote:
I'm not sure if there is any logic, but in my humble experience, it seems to be a lot easier to prime the Sierpinski k's compared to priming the Riesel k's. KEP Last fiddled with by KEP on 20080905 at 22:51 Reason: Change of decission. 

20080905, 23:30  #36 
Quasi Admin Thing
May 2005
1704_{8} Posts 
OK to point out exactly what I do:
1. Redoing the entire k<=500M range for Riesel base 3 2. Doing PRP tests up to n<=25,000 3. Verifies PRP tests 4. Does strict test of the PRP k's that turned out composite to n<=25,000 A request for the future:  Someone to develop af .pl script which can use "primes.out"file from Michafs script as input and write the verified primes to "verprimes.out" and the composites to "vercomposit.out".  Such a script, will make it easier to complete large ranges and reduce the need for reading through an entire log file on several GB. The wanted script needs to be developed, if any one would like to see me continue doing work on the Riesel base 3 conjecture. And now I appologize, it appears that for Base 3 the PRP testing is a lot faster (more than just 30 %) so now I just awaits to see how many composites is among those k's remaining, but if it in the future can be done this fast, no doubt I'll continue if such a script as requested previously gets developed. Regards KEP Ps. All k<=92997048 is in progress at the moment, so I hope everyone can accept the further delay, but with the lesson that I learned this time, I really think that a further and more speedy progress can be completed in the near future Pps. It appears to be at least 7 times faster to do PRP tests compared to strict prime tests! So sorry Gary and anyone else for not listening or respecting your words of wisdom! Last fiddled with by KEP on 20080905 at 23:33 
20080906, 04:54  #37  
May 2007
Kansas; USA
24143_{8} Posts 
Quote:
Please complete all k<100M to n=25K and send me the primes for n>=1K as well as the k's remaining. That is what will help us most and what I need to verify it all and start a team sieve and drive for the Riesel side. In other words, don't concern yourself with anything for k>100M right now until k<=100M is complete. Like you have concluded, just do PRP tests for now. When you have the entire k<100M range done, then do the proofs. For the few composite PRP's that you find, I'm sure you'll quickly find slightly higher primes for them. Thanks, Gary 

20080906, 08:51  #38  
Quasi Admin Thing
May 2005
3C4_{16} Posts 
Quote:
KEP! 

20080906, 08:56  #39  
May 2007
Kansas; USA
7^{2}×211 Posts 
Quote:
Sure, go ahead and send me all primes n>=501. No problem. 

20080922, 06:09  #40 
May 2007
Kansas; USA
10100001100011_{2} Posts 
Riesel base 3 at k=93M and n=25K
KEP reported in an Email on 9/12 that he had completed Riesel base 3 to k=93M and n=25K. He also sent primes > 500 and all 407 k's that were remaining.
KEP, I've checked the k's remaining and your logic for removing k's that were multiples of the base. I could find no errors! Very nice work! I did find one k remaining that had a previous top5000 prime. It is: 75030224*3^1337791 So there are officially 406 k's remaining for the range. The web pages now show the k's remaining and top 10 primes for the base. I will reserve k=93M100M up to n=25K to complete all k<100M. ETA is ~34 days on 2 slow cores. Sometime within a few weeks after that, we will start a minidrive to take the entire krange up to n=100K. Gary Last fiddled with by gd_barnes on 20080922 at 06:16 
20080922, 08:41  #41  
Quasi Admin Thing
May 2005
2^{2}×241 Posts 
Quote:
Good work on finding this extra prime, I had only checked for removal with q^n1, and not for previously top5000 primes. Looking forward to be taking new work on the Riesel base 3 again in the future, as soon as I complete what I've for now reserved Also in the future, you will recieve only entire 100M ranges. Just hope you didn't get to far on the Rb3 range, since it is still in work on 2 of my 6 cores, so progress will be steady and slow but I'll get there before long KEP 

20080922, 09:24  #42  
May 2007
Kansas; USA
7^{2}·211 Posts 
Quote:
Sounds good. Yes, I got your Email. I've stopped my effort now. Per my Email, please send the primes n>500 for your newest completed krange. Edit: Got the primes. Later today, I'll show you as having completed Riesel base 3 to k=134M and n=25K. Very nice work! Gary Last fiddled with by gd_barnes on 20080922 at 09:28 

20080922, 23:51  #43 
May 2007
Kansas; USA
24143_{8} Posts 
KEP has now reported completion to k=134M and n=25K for Riesel base 3.
621 k's are remaining in the range. He is continuing on to k=500M and n=25K. The web pages now show all appropriate info. For all of you who like to find larger primes for the smallest k's remaining on a base, here's a great chance! Per the pages, the k's < 5M that are still remaining for this base are: 2794756, 3591446, 3677878, 4223272, and 4245112. They have only been searched to n=25K so far. I'm going to start sieving k<100M for n=25K100K for another minidrive. Gary Last fiddled with by gd_barnes on 20080922 at 23:54 
20080923, 16:02  #44 
Just call me Henry
"David"
Sep 2007
Cambridge (GMT/BST)
5×1,171 Posts 
could i take 2794756*3^n1 please

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