本程序介绍完成读入1000个数的操作，并求出其中素数的个数。-This procedure describes the number of completed read operation 1000, and calculated the number of prime numbers of them.

输入一串数，将偶数分解为两个质数，如8=3+5，只取第一组，就是后面出现的8=5+3不再打印。-Enter a string of numbers, the even number into two prime numbers, such as 8 = 3+5, just take the first group, is behind the emergence of 8 = 5+3 no longer print.

Modified RSA cryptosystem based on offline storage and prime number