Numbers greater than 1 but not prime numbers are called composite numbers, and 1 and 0 are neither prime nor composite numbers. The attribute of prime number is called prime number, and prime number is in a basic and important position in number theory.
The smallest prime number is 2, and the largest prime number does not exist, which Euclid has proved in his Elements of Geometry.
There are many mathematical problems, conjectures and theorems around prime numbers, among which the twin prime number conjecture and Goldbach conjecture are famous.
The sequence of prime numbers begins like this:
2,3,5,7, 1 1, 13, 17, 19,23,29,3 1,37,4 1,43,47,53,59,6 1,67,7 1,73,79,83,89,97, 10 1, 103, 107, 109, 1 13