Do you know the **prime number definition**? We know that prime numbers are one of the special types of numbers in math. After going through this article you would able to know the **definition of prime number**.

Learning and understanding **prime number definition** is very important for the students. We should know that Prime number and factor both have a relation. If we study the prime number definition we come to know the relation of prime number and factor. So we will try to know **what is a prime number** with an example.

**Prime number definition as follows: **

Any number with only two factors is called a **prime number**. Here the two factors are the number and 1.

Example:

Let us take a number 7.

If we find out the factors for the number 7, we observe that 7 have only two factors. The factors of 7 are 7 and 1. As 7 have only two factors so 7 is called as a prime number.

Do you have any idea about number of prime numbers from 1 to 100 and how to find them? There exists 25 prime numbers from 1 to 100 and we can find them by sieve Eratosthenes method. It is good that if all the students knows the list of prime numbers from 1 to 100.

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