178      * @param int $base
181     abstract protected function init($number, $base = 10);  argument
212      * @param int $base
216     abstract protected function mod($base, $modulus);  argument
219      * @param int $base
223     abstract protected function pow($base, $exponent);  argument
248     function pow($base, $exponent)  argument
250         return bcpow($base, $exponent);
258     function init($number, $base = 10)  argument
263     function mod($base, $modulus)  argument
265         return bcmod($base, $modulus);
282      * @param int $base
287     function _powmod($base, $exponent, $modulus)  argument
289         $square = $this->mod($base, $modulus);
301     function powmod($base, $exponent, $modulus)  argument
304             return bcpowmod($base, $exponent, $modulus);
306             return $this->_powmod($base, $exponent, $modulus);
338     function pow($base, $exponent)  argument
340         return gmp_pow($base, $exponent);
348     function init($number, $base = 10)  argument
350         return gmp_init($number, $base);
353     function mod($base, $modulus)  argument
355         return gmp_mod($base, $modulus);
368     function powmod($base, $exponent, $modulus)  argument
370         return gmp_powm($base, $exponent, $modulus);