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gmp_powm

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(PHP 4 >= 4.0.4, PHP 5, PHP 7)

gmp_powm — Raise number into power with modulo

Description

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

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

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Parameters

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.

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.

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.

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Return Values

The new (raised) number, as a GMP number.

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Examples

Example #1 gmp_powm() example

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

The above example will output:

2147483648

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Document created the 30/01/2003, last modified the 26/10/2018
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References

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