The gmp_prob_prime() function in PHP is a function used to determine whether a number is prime.

gmp_prob_prime() function checks whether the GMP number is prime.

Syntax

gmp_prob_prime($n)

Parameters

• n - GMP number.

Return

gmp_prob_prime() function returns the following value -

• If the number is definitely not prime, it is 0

• 1 If the number is probably prime

• 2 If the number is definitely prime.

Example

The following is an example -

<?php
   gmp_prob_prime("11")
?>

Output

The following is the output -

2

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