gmp_nextprime
PHP function
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(PHP 5 >= 5.2.0, PHP 7, PHP 8)
Find next prime number
Description
gmp_nextprime(GMP|int|string $num): GMP
Find next prime number
Parameters
numParameter
Return Values
Return the next prime number greater than num, as a GMP number.
Examples
gmp_nextprime() example
php
<?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:
output
11
2Notes
Note
This function uses a probabilistic algorithm to identify primes and chances to get a composite number are extremely small.