多数程序设计语言处理整数的能力是有限的，如C语言中，int类型数据范围是-32767----32767。实际问题的处理过程中往往涉及大整数的运算，如RSA加密算法要求至少64bit的整数，本程序是设计算法实现大整数的加减运算。-majority programming language processing is integral to the limited capacity, such as C language, int data type is the scope -32767 ----

产生大素数，进行任何位的RSA加密解密，进行大整数的进制转换，进行大整数的加法和乘法运算。-Generate large prime numbers, any bit RSA encryption and decryption, binary large integer conversion, large integer addition and multiplication.