203     function pow($base, $exponent)  argument
205         return bcpow($base, $exponent);
213     function init($number, $base = 10)  argument
218     function mod($base, $modulus)  argument
220         return bcmod($base, $modulus);
238     function _powmod($base, $exponent, $modulus)  argument
240         $square = $this->mod($base, $modulus);
252     function powmod($base, $exponent, $modulus)  argument
255             return bcpowmod($base, $exponent, $modulus);
257             return $this->_powmod($base, $exponent, $modulus);
289     function pow($base, $exponent)  argument
291         return gmp_pow($base, $exponent);
299     function init($number, $base = 10)  argument
301         return gmp_init($number, $base);
304     function mod($base, $modulus)  argument
306         return gmp_mod($base, $modulus);
319     function powmod($base, $exponent, $modulus)  argument
321         return gmp_powm($base, $exponent, $modulus);