gmp_powm

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gmp_powmRaise number into power with modulo

Description

gmp_powm(GMP|int|string $num, GMP|int|string $exponent, GMP|int|string $modulus): GMP

Calculate (num raised into power exponent) modulo modulus. If exponent is negative, result is undefined.

Parameters

num

The base number.

A GMP object, an int or a numeric string.

exponent

The positive power to raise the num.

A GMP object, an int or a numeric string.

modulus

The modulo.

A GMP object, an int or a numeric string.

Return Values

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

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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User Contributed Notes 1 note

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jessietessie256 at gmail dot com
2 years ago
can be used for RSA encryption/decryption!
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