php man page for gmp_powm

GMP_POWM(3)								 1							       GMP_POWM(3)

gmp_powm - Raise number into power with modulo

SYNOPSIS
       GMP gmp_powm (GMP  $base, GMP  $exp, GMP  $mod)

DESCRIPTION
	Calculate ($base raised into power $exp) modulo $mod. If $exp is negative, result is undefined.

PARAMETERS
	      o $base
		-  The	base  number.  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.

	      o $exp
		- The positive power to raise the $base. 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.

	      o $mod
		- The modulo. 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
	The new (raised) number, as a GMP number.

EXAMPLES
       Example #1

	      gmp_powm(3) example

	      <?php
	      $pow1 = gmp_powm("2", "31", "2147483649");
	      echo gmp_strval($pow1) . "
";
	      ?>

	      The above example will output:

	      2147483648

PHP Documentation Group 													       GMP_POWM(3)