这道题不难,但题目中写道:
Examples of prime numbers are: 1, 2, 3, 5, 17, 101 and 10007.\text{Examples of prime numbers are: 1, 2, 3, 5, 17, 101 and 10007.}Examples of prime numbers are: 1, 2, 3, 5, 17, 101 and 10007.
它认为 111 是质数!