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Groups > comp.lang.javascript > #29293
| From | "Chris M. Thomasson" <nospam@nospam.nospam> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: Primality sieve challenge |
| Date | 2016-01-17 12:46 -0800 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <n7guk8$s1v$1@gioia.aioe.org> (permalink) |
| References | <5b608a56-e16b-4467-a0ce-4e30f6796920@googlegroups.com> |
> jonas.thornvall@gmail.com wrote in message
> news:5b608a56-e16b-4467-a0ce-4e30f6796920@googlegroups.com...
> Maybe we could have a challenge finding the base with best reducion upto
> 100 000000?
> One probably do not want to store more vectors than that in memory, and i
> guess
[...]
FWIW, here is some older code that finds primes. Its not a sieve, but oh
well:
https://groups.google.com/d/msg/comp.lang.javascript/ieCClS2d3kA/0-IwPBuMh2UJ
______________________________________________________________
<!DOCTYPE html>
<html>
<title>Primes</title>
<script type="text/javascript">
function is_prime(n)
{
if (isNaN(n) || ! isFinite(n) || n % 1 || n < 2)
return false;
if (! (n % 2)) return (n == 2);
if (! (n % 3)) return (n == 3);
var m = Math.sqrt(n);
for (var i = 5; i <= m; i += 6)
{
if (! (n % i) || ! (n % (i + 2)))
return false;
}
return true;
}
function count_prime(m)
{
var c = 0;
for (var n = 2; n < m; ++n)
if (is_prime(n)) ++c;
return c;
}
function main()
{
console.time("count_prime");
var c = count_prime(20000000);
console.timeEnd("count_prime");
alert("Found " + c + " Primes.");
}
</script>
<body onload="main();">
</body>
</html>
______________________________________________________________
;^)
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Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-17 01:40 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-17 02:20 -0800
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-17 16:24 +0000
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-17 09:03 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-17 09:17 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-17 09:22 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-17 11:32 -0800
Re: Primality sieve challenge Stefan Weiss <krewecherl@gmail.com> - 2016-01-18 00:13 +0100
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 04:10 -0800
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-18 01:20 +0000
Re: Primality sieve challenge "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-01-18 12:16 +0100
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-18 11:25 +0000
Re: Primality sieve challenge "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-01-18 12:43 +0100
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 04:18 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 04:25 -0800
Re: Primality sieve challenge Gene Wirchenko <genew@telus.net> - 2016-01-18 09:52 -0800
Re: Primality sieve challenge "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-01-18 19:23 +0100
Re: Primality sieve challenge "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-01-18 10:48 -0800
Re: Primality sieve challenge Gene Wirchenko <genew@telus.net> - 2016-01-18 13:09 -0800
Re: Primality sieve challenge Scott Sauyet <scott.sauyet@gmail.com> - 2016-01-18 13:14 -0800
Re: Primality sieve challenge "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-01-18 22:45 +0100
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 14:23 -0800
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-18 22:56 +0000
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 15:02 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 16:04 -0800
Re: Primality sieve challenge Stefan Weiss <krewecherl@gmail.com> - 2016-01-19 02:42 +0100
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 23:34 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-19 01:34 -0800
Re: Primality sieve challenge "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-01-19 06:23 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-19 07:10 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-19 07:15 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-19 08:34 -0800
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-19 16:54 +0000
Re: Primality sieve challenge "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-01-19 08:57 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-19 10:18 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-19 10:59 -0800
Re: Primality sieve challenge Stefan Weiss <krewecherl@gmail.com> - 2016-01-20 01:33 +0100
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-20 02:10 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-20 02:21 -0800
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-20 10:45 +0000
Re: Primality sieve challenge "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-01-20 06:43 -0800
Re: Primality sieve challenge Scott Sauyet <scott.sauyet@gmail.com> - 2016-01-20 15:21 -0800
Re: Primality sieve challenge Stefan Weiss <krewecherl@gmail.com> - 2016-01-21 03:18 +0100
Re: Primality sieve challenge Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2016-01-21 12:12 +0000
Re: Primality sieve challenge Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> - 2016-01-21 23:20 +0000
Re: Primality sieve challenge Stefan Weiss <krewecherl@gmail.com> - 2016-01-22 19:44 +0100
Re: Primality sieve challenge Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> - 2016-01-23 21:50 +0000
Re: Primality sieve challenge Stefan Weiss <krewecherl@gmail.com> - 2016-01-24 01:26 +0100
Re: Primality sieve challenge "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-01-23 17:54 -0800
Re: Primality sieve challenge "Chris M. Thomasson" <nospam@no-spam.ws> - 2016-01-24 13:34 -0800
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-25 00:21 +0000
Re: Primality sieve challenge Stefan Weiss <krewecherl@gmail.com> - 2016-01-25 03:08 +0100
Re: Primality sieve challenge "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-01-24 19:35 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-25 03:53 -0800
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-18 19:32 +0000
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-17 19:51 +0000
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-17 13:43 -0800
Re: Primality sieve challenge "Chris M. Thomasson" <nospam@nospam.nospam> - 2016-01-17 12:46 -0800
Re: Primality sieve challenge Gene Wirchenko <genew@telus.net> - 2016-01-18 09:50 -0800
Re: Primality sieve challenge Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-18 20:09 +0100
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-18 19:28 +0000
Re: Primality sieve challenge Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-18 21:37 +0100
Re: Primality sieve challenge Scott Sauyet <scott.sauyet@gmail.com> - 2016-01-18 13:12 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 13:46 -0800
Re: Primality sieve challenge jonas.thornvall@gmail.com - 2016-01-18 14:00 -0800
Re: Primality sieve challenge Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-19 13:47 +0100
Re: Primality sieve challenge Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-19 14:04 +0000
Re: Primality sieve challenge Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-19 19:59 +0100
Re: Primality sieve challenge Scott Sauyet <scott.sauyet@gmail.com> - 2016-01-19 10:55 -0800
Re: Primality sieve challenge Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-19 20:04 +0100
Re: Primality sieve challenge Scott Sauyet <scott.sauyet@gmail.com> - 2016-01-19 13:42 -0800
Re: Primality sieve challenge Erwin Moller <erwinmollerusenet@xs4all.nl> - 2016-01-21 17:21 +0100
Re: Primality sieve challenge Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-03 19:52 +0100
Re: Primality sieve challenge Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> - 2016-01-19 19:43 +0000
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