Is 1979 a prime number?

The number 1979 has got several factors, that are capable of dividing the number completely without leaving any remainder. Thus the number 1979 is a non-prime number. The factors of 1979 include 1, 43, 46, 91, 1979.

A number to be a prime number should follow the criteria, which is that it should not have factors more than 2. Here, 1979 has more than 2 factors, hence making it a composite number.

Given below are a few ways that can be used to find prime or composite numbers.

The different methods we can use to check if a number is a prime number are explained below.

1. Counting Divisors Method
2. Divisibility Test
3. Prime Number Chart
4. Prime Factorization

For the counting divisors method, it is to be checked whether the number is divisible by any numbers other than 1 and the number itself.

The counting divisors method for 1979 would simply be

Divisors of 1979 = 1, 43, 46, 91, 1979
Number of divisors = 5

The number 1979 can be considered composite

In the division method, we try to divide the number by any of the prime numbers. If we cannot, then it is considered a prime number.

In the divisibility method, the prime number only has 2 divisors, which are 1 and itself.

The divisors of 1979 are 1, 43, 46, 91, and 1979.

Thus, 1979 consists of 5 factors that divide it completely without any remainder.

The prime number chart is the list of prime numbers starting from 2 to infinity.

The list of prime numbers under 100 are;
2, 3, 5, 7, 11, 13, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.

1979 is not present in the list, it is not a prime number.

This method is only used for a non-prime number/composite number. Since 1979 is a composite number, the prime factorization for 1979 is:

Factors of 1979 = 43 × 46

Prime Number: A natural number greater than 1 that has only two divisors: 1 and itself. Numbers like 2, 3, 5, and 7 are prime numbers.

Composite Number: A natural number greater than 1 that has more than two divisors. Unlike prime numbers, composite numbers can be divided evenly by at least one number other than 1 and itself.

Divisor: A number that divides another number exactly without leaving a remainder. For example, 1, 43, 46, and 91 are divisors of 1979.

Prime Factorization: The process of breaking down a number into its prime number factors. For example, the prime factorization of 1979 is 3 × 659.

Divisibility Test: A method used to check whether a number is divisible by another number without performing division. If a number divides another without leaving a remainder, it is considered divisible by that number.