PHP - gmp_nextprime() Function

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Definition and Usage

The gmp_nextprime() function helps to find the next prime number.

Description

The gmp_nextprime() function returns the next prime number that is greater than the given GMP number.

Syntax

 gmp_nextprime ( int $a ) : GMP 

Parameters

Return Values

PHP gmp_nextprime() function returns a GMP number.The number returned is a perfect prime number and greater than given GMP number.

PHP Version

This function will work from PHP Version greater than 5.2.0.

Example 1

Working of gmp_nextprime() −

 <?php $num = gmp_nextprime("2299897"); echo "The next prime number after 2299897 is :".$num; ?> 

This will produce following result −

 The next prime number after 2299897 is :2299901 

Example 2

Working of gmp_nextprime() −

 <?php $num = gmp_nextprime("50"); echo "The next prime number after 50 is :".$num; ?> 

This will produce following result −

 The next prime number after 50 is :53