To determine if 1388 is a prime number or a composite number, we simply look at the factors for 1388.
If the factors of 1388 are only 1388 and 1, then we know that 1388 is a prime number. Otherwise, 1388 is a composite number.
To explain better, if 1388 is only divisible by 1 and 1388, then it is a prime number, and if 1388 is divisible by more than 1388 and 1, then it is a composite number.
The factors of 1388 are as follows:
1, 2, 4, 347, 694, 1388
Therefore, since 1388 is divisible by more than one and itself, the answer to the
question "Is 1388 prime or composite?" is highlighted in blue below.
composite
Is 1389 prime or composite?
OK. Now you know that 1388 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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