To prove whether a number is a prime number, first try dividing it by two and see if you get a whole number. If you do, it cannot be a prime number. If you do not get a whole number, try dividing it by prime numbers: 3, 5, 7, 11, and so on, constantly dividing by a prime number. To understand this mechanism, one can create an algorithm. As shown in the below algorithm, a primality test is an algorithm for determining whether an input number is prime. It should be noted here that the prime number algorithm is a program used to find prime numbers by sieving or removing composite numbers. The algorithm makes work more accessible by eliminating complex looping divisions or multiplications.