GMP_NEXTPRIME(3) 1 GMP_NEXTPRIME(3)
gmp_nextprime - Find next prime number
SYNOPSIS
GMP gmp_nextprime (int $a)
DESCRIPTION
Find next prime number
PARAMETERS
o $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.
RETURN VALUES
Return the next prime number greater than $a, as a GMP number.
EXAMPLES
Example #1
gmp_nextprime(3) 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) . "
";
echo gmp_strval($prime2) . "
";
?>
The above example will output:
11
-997
NOTES
Note
This function uses a probabilistic algorithm to identify primes and chances to get a composite number are extremely small.
PHP Documentation Group GMP_NEXTPRIME(3)
