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#342 |
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"Mark"
Apr 2003
Between here and the
24·397 Posts |
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#343 |
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"Erling B."
Dec 2005
10110002 Posts |
For k=2038.Sierb. base 9. 230k-240k No prime.
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#344 |
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Quasi Admin Thing
May 2005
2×3×7×23 Posts |
I'm reserving all 4 k's for Sierpinski base 22, untill 1 million or primed.
KEP! |
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#345 |
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Quasi Admin Thing
May 2005
2·3·7·23 Posts |
Have also begun sieving the remaining 6 k's total for Riesel Base 22 and 23 plus Sierpinski Base 23. So is also taking these. They will all be taken to 1 million n or primed.
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#346 |
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Sep 2004
2×5×283 Posts |
I think sr2 already does that, and yes, it sieves both Riesel and Sierp...if not you have to go to sr5 sieve source and change the sr5sieve.h definition of BASE.
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#347 |
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Jan 2006
Hungary
22·67 Posts |
Hi everyone,
as a side project I've tried the first million of the base 7 Riesel Conjecture. There are 120 k's with with no prime below 2000 There are 14 k's with no prime below 35000: 48584 184434 257318 315768 328226 347004 477458 493032 512222 623264 747176 839022 913284 949992 Here is the top ten of primes so far: k n 401994 32471 706712 32437 874026 30253 571388 26879 434556 26167 478826 21805 78648 19918 258582 18801 940146 17631 437754 15967 I have a sieve file that is sieved until n=100,000. I'll finish that and after that I'll leave this base for people with quantum computers. Having fun, Willem |
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#348 | |
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A Sunny Moo
Aug 2007
USA (GMT-5)
624910 Posts |
Quote:
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#349 | |
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May 2007
Kansas; USA
242438 Posts |
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Is that so??? I didn't know that. How can it be very efficient sieving multiple bases in one sieve? I knew that it could do Riesel and Sierp in the same sieve but not different bases. Assuming that it can do multiple bases for one sieve, I would test it first before doing so. It might take less total CPU time to run 2 instances of the 2 different bases than to run both bases in one instance. Gary |
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#350 | |
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May 2007
Kansas; USA
101·103 Posts |
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Willem, Before getting too far into any more side efforts, can you give an update on your Riesel base 19 effort? It looks like you were about done with that. You stated that you were going to n=30K with it and were already at n=25K with 1601 k's remaining. Thanks, Gary |
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#351 | |
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May 2007
Kansas; USA
28A316 Posts |
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Willem, For historical reference, I have to get all of the primes found, both small and large, at some point from you. Do you happen to have all of them available for Riesel base 7 to k=1M? I know you don't like to keep the small primes or results. If you don't have them here, how about I run PFGW on a couple of cores for a day or so up to n=5K to get the small primes and you can send me all of your primes for n>5K? I'm assuming you have all of those available. I will shortly reflect your Riesel base 7 effort on the web pages. Next I'll be digging into your base 25 effort(s) to see if anything is needed there. Thanks, Gary |
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#352 | |
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May 2007
Kansas; USA
101·103 Posts |
Quote:
Willem, I'm analyzing and balancing k's remaining on Riesel base 25 now. You apparently eliminated 20 k's between n=10K and 15K but I don't see any primes listed for them in any of your attachments here. You dropped from 357 k's remaining to 337 k's remaining, which both included the 69 base 5 k's that are being worked on by that project. I just need the primes for that difference of 20. Also, do you happen to have the primes for n<2K? If not, I'll run PFGW for a little while to get them. Thanks, Gary Last fiddled with by gd_barnes on 2008-06-30 at 19:58 |
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