Is One (1) a Prime Number?

This is a question which stumps many test takers. So, let’s set the record straight. The number 1 is NOT a prime number. To understand this, you need to know the definition of prime numbers.

A prime number is a number which has two different factors: itself and 1. In other words, it should be divided by itself and 1. In the case of 1, it has only one factor – itself!

For exam purposes, it is a good idea to learn the first few prime numbers. The first prime number is 2. The first few prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23…

What else you can do inside qs leap ?

2500+ Free
Practice Questions

Get Free Access to 2500+ GMAT/GRE Questions

30 Min
Prep Classes

Attend Free GMAT/GRE Prep Classes Everyday

Virtual One-to-One

On-demand online meetings with Admissions Teams for free

Just for the record, 2 is the only even prime number.

Attempt a few questions.

Channel Name