经典的MillRab（蒙特卡罗）概率算法，用于素数测试。蒙特卡罗算法的错误概率不超过 （1/4)^k,k为算法的运行次数。-classic MillRab (Monte Carlo) probabilistic algorithm for testing in a few. Monte Carlo algorithm error probability less than (1 / 4) ^ k, k algorithm for the operation frequency.