Find out the smallest prime number and how to calculate it using the concept of prime numbers. See the detailed solution and other related questions on integers and number system. Prime Numbers from 1 to 100 are explained here. Know about prime number definition, list, largest and smallest prime number and a quiz based on prime numbers . Looking for a friendly definition of a prime number ? Open this article to learn how to find prime numbers with ease! Smallest Prime Number : 2 is the smallest prime number in the set of prime numbers , as it is only divisible by 1 and itself. This property makes it unique among all prime numbers .