Prime numbers are the numbers that have only two factors, that are, 1 and the number itself. Consider an example of number 5, which has only two factors 1 and 5. This means it is a prime number. Let's take another example of the number 6, which has more than two factors, i.e 1, 2, 3, and 6. This means 6 is not a prime number. Now, if we take the example of the number 1, we know that it has only one factor. So, it cannot be a prime number as a prime number should have exactly two factors

I pass.

Guess I need another password, or place to shop......

I'm a drummer. I only count to four, if need be twice. Beyond that, my math skills suck.

I suspect that he numbers ending in 3 or 7 are prime numbers...

I accepted that I am a robot a long time ago.