To determine if 1979 is a prime number or a composite number, we simply look at the factors for 1979.
If the factors of 1979 are only 1979 and 1, then we know that 1979 is a prime number. Otherwise, 1979 is a composite number.
To explain better, if 1979 is only divisible by 1 and 1979, then it is a prime number, and if 1979 is divisible by more than 1979 and 1, then it is a composite number.
The factors of 1979 are as follows:
1, 1979
Therefore, since 1979 is divisible by only one and itself, the answer to the
question "Is 1979 prime or composite?" is highlighted in blue below.
prime
Is 1980 prime or composite?
OK. Now you know that 1979 is a prime number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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