The conversation between human and AI assistant.
[|Human|] Given the following text, what is special about Prime Numbers?
[|AI|] A prime number is a natural number great than one that is only divisible by itself and one. e.g. 5 is a prime number as it is only divisible by 5 and 1, but 4 is not as 4 is divisible by 4,2 and 1
[|Human|] 
Given the following text, what is special about Prime Numbers?