You can easily calculate the prime factorization and check a number either prime or not prime.

WHAT IS PRIME NUMBER
Prime factor is the factor of the given number which is a prime number. Factors are the numbers you multiply together to get another number. In simple words, prime factor is finding which prime numbers multiply together to make the original number.

Some Interesting Facts About Prime Factor :

There is only one (unique!) set of prime factors for any number.
In order to maintain this property of unique prime factorizations, it is necessary that the number one, 1, be categorized as neither prime nor composite.
Prime factorizations can help us with divisibility, simplifying fractions, and finding common denominators for fractions.
Pollard’s Rho is a prime factorization algorithm, particularly fast for a large composite number with small prime factors.
Cryptography is the study of secret codes. Prime Factorization is very important to people who try to make (or break) secret codes based on numbers.