2 is the smallest prime number.
A prime number is a number that has only two factors, that is 1 and the number itself.
The smallest non-zero number is 1.
The factor of 1 = 1
1 has only one factor which is 1 itself.
The next smallest non-zero number is 2.
Factors of 2 = 1 and 2
It has only two factors, 1 and the number itself 2.
Therefore, 2 is the smallest prime number.
