Smallest twodigit prime numberWhat is a Prime Number?The natural numbers that are greater than 1 and having only two factors are called as prime numbers. There are two factors of a prime number in which one factor is '1' and another factor is the number itself. So, a prime number can only be divisible by 1 and itself. The smallest two digit prime numberThe smallest twodigit number is 11. It has only two factors that are '1' and '11' itself. The next twodigit prime number after 11 is 13, and the prime number previous to 11 is 7. Although the smallest twodigit number is 10, but it has more than two factors, and it also cannot be expressed in the form of the 6n + 1 or 6n 1, so it cannot be considered as a prime number. But 11 satisfy all conditions of a prime number, so it is the smallest twodigit prime number. Except 2 and 3, every prime number can either be expressed in the form of 6n + 1 or 6n  1. So, let's try to express 11 in these forms. If we consider n as 2, so 11 can be written in the form of 6n  1. 6 (2)  1 = 11 (where n = 2) So, 11 is a prime number. In order to check whether the number is prime or not, we can follow the below steps 
Properties of prime numbersThere are some properties of the prime numbers that are listed as follows 
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