An exploration of the properties, relationships, and applications of positive integers in various mathematical contexts.
A prime number is a positive integer greater than 1 that has exactly two divisors: 1 and itself. For example, 7 is prime because only 1 and 7 divide it exactly.
Composite numbers have more than two divisors. For example, 12 is composite because it can be divided by 1, 2, 3, 4, 6, and 12.
Primes are the "atoms" of the number world. Every positive integer can be broken down into prime factors. This is called the Fundamental Theorem of Arithmetic.
Primes play a big role in computer security and codes!
13 is a prime number; it can only be divided by 1 and 13.
18 is composite; it can be divided by 1, 2, 3, 6, 9, and 18.
Prime numbers have only two divisors, while composite numbers have more.