To determine if 7978 is a prime number or a composite number, we simply look at the factors for 7978.
If the factors of 7978 are only 7978 and 1, then we know that 7978 is a prime number. Otherwise, 7978 is a composite number.
To explain better, if 7978 is only divisible by 1 and 7978, then it is a prime number, and if 7978 is divisible by more than 7978 and 1, then it is a composite number.
The factors of 7978 are as follows:
1, 2, 3989, 7978
Therefore, since 7978 is divisible by more than one and itself, the answer to the
question "Is 7978 prime or composite?" is highlighted in blue below.
composite
Is 7979 prime or composite?
OK. Now you know that 7978 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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