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Rechercher une fonction PHP

gmp_nextprime

Contents

(PHP 5 >= 5.2.0, PHP 7)

gmp_nextprime — Find next prime number

Description

gmp_nextprime ( int $a ) : GMP

Find next prime number

PHP: gmp_nextprime - Manual Home of Manuel PHP  Contents Haut

Parameters

a

Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.

PHP: gmp_nextprime - Manual Home of Manuel PHP  Contents Haut

Return Values

Return the next prime number greater than a, as a GMP number.

PHP: gmp_nextprime - Manual Home of Manuel PHP  Contents Haut

Examples

Example #1 gmp_nextprime() example

<?php
$prime1 = gmp_nextprime(10); // next prime number greater than 10
$prime2 = gmp_nextprime(-1000); // next prime number greater than -1000

echo gmp_strval($prime1) . "\n";
echo gmp_strval($prime2) . "\n";
?>

The above example will output:

11
2

PHP: gmp_nextprime - Manual Home of Manuel PHP  Contents Haut

Notes

Note:

This function uses a probabilistic algorithm to identify primes and chances to get a composite number are extremely small.

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