To determine if 1977 is a prime number or a composite number, we simply look at the factors for 1977.
If the factors of 1977 are only 1977 and 1, then we know that 1977 is a prime number. Otherwise, 1977 is a composite number.
To explain better, if 1977 is only divisible by 1 and 1977, then it is a prime number, and if 1977 is divisible by more than 1977 and 1, then it is a composite number.
The factors of 1977 are as follows:
1, 3, 659, 1977
Therefore, since 1977 is divisible by more than one and itself, the answer to the
question "Is 1977 prime or composite?" is highlighted in blue below.
composite
Is 1978 prime or composite?
OK. Now you know that 1977 is a composite 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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