Definition Of Prime Number

A prime number is a positive integer that has exactly two factors, 1 and the number itself.

Example of Prime Number

2, 3, 5, 7, 11, 13, 17, 19, etc. are all prime numbers.
There are infinitely many prime numbers.

Video Examples: Prime Numbers

Solved Example on Prime Number

Ques: Is 41 a prime number?

Choices:

A. Yes
B. No
Correct Answer: A

Solution:

Step 1: The only divisors of 41 are 1 and 41. So, 41 is a prime number.

Related Worksheet

• Prime-and-Composite-Numbers-Gr-4