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2018-01-17, 00:06
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#430 |
Dec 2011
After milion nines:)
26508 Posts |
So Gary, if I understand correctly can I make "ordinary sieve" on sequence 9519*2^n-1 and then remove all odd candidates from sieve?
If that is true, then GPU can help us alot, since GPU sieve is way faster then CPU sieve. |
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2018-01-17, 00:10
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#431 | |
May 2007
Kansas; USA
101×103 Posts |
Quote:
Alternatively you can sieve 9519*4^n-1 at half the n-range, i.e. 2^23-2^25 (n=8388608 to 33554432). No n-removal is then needed. But I don't know if a GPU can do anything except base 2. Coordinate with Peter before doing anything. He has probably already removed odd n's or is sieving base 4. He is the starting point for all of this. Last fiddled with by gd_barnes on 2018-01-17 at 00:11 |
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2018-01-17, 00:15
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#432 | |
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Dec 2011
After milion nines:)
23·181 Posts |
Quote:
I will not start anything , dont worry :) But idea with GPU still stay... |
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2018-01-17, 15:53
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#433 |
Jun 2009
68410 Posts |
I just sent the file to Mr. Bitcoin, odd n values were removed and P=160e12. As the optimal sieve depth increases with increasing n values I wasn't sure about 25e15. But now I realize it's so much more than what I had for the previous file which went up to n=2^24 I cannot imagine 25e15 to not be enough. Well, we will see.
Any help about using GPUs will be greatly appreciated as nobody wants to waste time. |
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2018-02-13, 07:28
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#434 |
May 2004
FRANCE
10010001002 Posts |
Sierpinski odd n's testing
Hi,
k=9267 is now tested up to n = 9,003,487 (2,710,324 decimal digits) no prime, continuing... Best Regards, Jean |
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2018-04-01, 06:11
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#435 |
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May 2004
FRANCE
22·5·29 Posts |
Sierpinski odd n's testing
Hi,
k=9267 is now tested up to n = 9,200,215 (2,769,545 decimal digits) no prime, continuing... Best Regards, Jean |
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2018-05-21, 14:41
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#436 |
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May 2004
FRANCE
10010001002 Posts |
Sierpinski odd n's testing
Hi,
k=9267 is now tested up to n = 9,400,135 (2,829,727 decimal digits) no prime, continuing... Best Regards, Jean |
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2018-07-03, 15:37
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#437 |
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May 2004
FRANCE
22·5·29 Posts |
Sierpinski odd n's testing
Hi,
k=9267 is now tested up to n = 9,602,743 (2,890,718 decimal digits) no prime, continuing... Best Regards, Jean |
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2018-09-24, 06:16
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#438 |
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May 2004
FRANCE
58010 Posts |
Sierpinski odd n's testing
Hi,
k=9267 is now tested up to n = 10,003,207 (3,011,270 decimal digits) no prime, continuing... Best Regards, Jean |
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2018-11-03, 15:29
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#439 |
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May 2004
FRANCE
22×5×29 Posts |
Sierpinski odd n's testing
Hi,
k=9267 is now tested up to n = 10,136,695 (3,051,454 decimal digits) no prime, continuing... Best Regards, Jean |
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2018-12-23, 06:34
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#440 |
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May 2004
FRANCE
22·5·29 Posts |
Sierpinski odd n's testing
Hi,
k=9267 is now tested up to n = 10,301,167 (3,100,965 decimal digits) no prime, continuing... Best Regards, Jean |
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