质数 (Prime Number)

只能被1和该数整除

They are the numbers with exactly two positive divisors, 1 and the number itself.

看一看你有多厉害~ 

Test your knowledge about prime number.

https://create.kahoot.it/share/prime-numbers/e2a13d99-c80b-4531-8a96-70c9feff4cd2