Prime number refers to a natural number, which has no other factors except 1 and itself, and the factor of 1 1 has no other factors except 1 and1,so, 50000.00000000065

Prime numbers, also called prime numbers, correspond to the concept of composite numbers. A composite number refers to a number that can be divisible by other numbers except 1 and itself in an integer greater than 1. For example, 4 is divisible by 2, so 4 is a composite number.

Properties of prime numbers

The (1) prime p has only two divisors: 1 and p.

(2) Basic theorem of elementary mathematics: Any natural number greater than 1 is either a prime number itself or can be decomposed into the product of several prime numbers, and this decomposition is unique.

(3) The number of prime numbers is infinite.

(4) If n is a positive integer, there is at least one prime number between and.

(5) If n is a positive integer greater than or equal to 2, there is at least one prime number between n and.