Numbers divisible by one and itself

A prime number is a special kind of natural number that is greater than 1 and has no positive divisors other than 1 and itself. In other words, it is a number that cannot be divided evenly by any other number except 1 and itself. Examples of prime numbers include 2, 3, 5, 7, 11, 13, 17, 19, 23, and so forth. Prime numbers play a fundamental role in number theory, which is a branch of mathematics that deals with the properties of numbers and their relationships. They have various applications in fields such as cryptography and computer science, where they are used to create secure encryption algorithms. For example, the RSA encryption algorithm is based on the fact that it is very difficult to factorize large prime numbers, making it virtually impossible for anyone to decrypt the message without the correct key.