To determine if 1387 is a prime number or a composite number, we simply look at the factors for 1387.
If the factors of 1387 are only 1387 and 1, then we know that 1387 is a prime number. Otherwise, 1387 is a composite number.
To explain better, if 1387 is only divisible by 1 and 1387, then it is a prime number, and if 1387 is divisible by more than 1387 and 1, then it is a composite number.
The factors of 1387 are as follows:
1, 19, 73, 1387
Therefore, since 1387 is divisible by more than one and itself, the answer to the
question "Is 1387 prime or composite?" is highlighted in blue below.
composite
Is 1388 prime or composite?
OK. Now you know that 1387 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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