To determine if 1138 is a prime number or a composite number, we simply look at the factors for 1138.
If the factors of 1138 are only 1138 and 1, then we know that 1138 is a prime number. Otherwise, 1138 is a composite number.
To explain better, if 1138 is only divisible by 1 and 1138, then it is a prime number, and if 1138 is divisible by more than 1138 and 1, then it is a composite number.
The factors of 1138 are as follows:
1, 2, 569, 1138
Therefore, since 1138 is divisible by more than one and itself, the answer to the
question "Is 1138 prime or composite?" is highlighted in blue below.
composite
Is 1139 prime or composite?
OK. Now you know that 1138 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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