Prime numbers are a mathematical curiosity that has fascinated mathematicians and non-mathematicians alike for centuries. Prime numbers are natural numbers greater than 1 that are divisible only by themselves and 1.
A prime number cannot be evenly divided without a remainder by any integer except for the number itself or 1. This means that a number is either a prime or not, with no in-between.
Prime numbers also have many uses. One such use is in public-key cryptography. Prime numbers are used to build up the public key. The size of this number determines how secure your communication is as well as how difficult it will be for someone to break it. Another use of prime numbers is in the encryption of data stored on computers and other digital devices.
These peculiar numbers play a central role in modern cryptography as well as proof-of-work algorithms used in cryptocurrencies.