A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. In other words, it cannot be evenly divided by any other number except for 1 and the number itself.
Prime numbers are fundamental in number theory and mathematics, as they are the building blocks for all positive integers.
They have applications in various fields, including cryptography, computer science, and the generation of random numbers. Some examples of prime numbers include 2, 3, 5, 7, 11, and 13.