gmp_prob_prime() function in PHP

The gmp_prob_prime() function checks for the possibility of a GMP number to be prime.

Syntax

gmp_prob_prime($n)

Parameters

• n − A GMP number.

Return

The gmp_prob_prime() function returns the following values −

• 0 if the number is definitely not prime

• 1 if the number may be prime

• 2 if the number is a prime for sure.

Example

The following is an example −

<?php
   gmp_prob_prime("11")
?>

Output

The following is the output −

2