note 115805 added to function.gmp-prob-prime
| From: | florin dot ciuica at yahoo dot com | Date: | Fri, 26 Sep 2014 10:00:36 +0000 |
| Subject: | note 115805 added to function.gmp-prob-prime | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-200529@lists.php.net to get a copy of this message | ||
<?php
$max = 2147483647;
$primesFound = 0;
$probablePrimes = 0;
for ($x = 1; $x <= $max; $x++) {
$primeStatus = gmp_prob_prime($x);
if ($primeStatus == 1) {
$probablePrimes++;
} else if ($primeStatus == 2) {
$primesFound++;
}
}
echo "Total primes found: " . $primesFound . " between 1 and " . $max . ".
Probable primes in this interval: " . $probablePrimes;
?>
Based on that the following results were obtained:
1 - 100000 - certain primes found: 9592, probable: 0
1 - 1000000 - certain primes found: 78498, probable: 0
1 - 10000000 - certain primes found: 78498, probable: 586081
1 - 100000000 - certain primes found: 78498, probable: 5682957
1 - 1000000000 - certain primes found: 78498, probable: 50769036
1 - 2147483647 - certain primes found: 78498, probable: 105019067
----
Server IP: 72.52.91.14
Probable Submitter: 109.98.52.245
----
Manual Page -- http://php.net/manual/en/function.gmp-prob-prime.php
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