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gmp_prob_prime> <gmp_pow
[edit] Last updated: Fri, 17 May 2013

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gmp_powm

(PHP 4 >= 4.0.4, PHP 5)

gmp_powmRaise number into power with modulo

说明

resource gmp_powm ( resource $base , resource $exp , resource $mod )

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

参数

base

The base number.

可以是一个 GMP 数据 resouce,或一个可以转换为数值的字符串。

exp

The positive power to raise the base.

可以是一个 GMP 数据 resouce,或一个可以转换为数值的字符串。

mod

The modulo.

可以是一个 GMP 数据 resouce,或一个可以转换为数值的字符串。

返回值

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

范例

Example #1 gmp_powm() example

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

以上例程会输出:

2147483648



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