To determine if 1139 is a prime number or a composite number, we simply look at the factors for 1139.
If the factors of 1139 are only 1139 and 1, then we know that 1139 is a prime number. Otherwise, 1139 is a composite number.
To explain better, if 1139 is only divisible by 1 and 1139, then it is a prime number, and if 1139 is divisible by more than 1139 and 1, then it is a composite number.
The factors of 1139 are as follows:
1, 17, 67, 1139
Therefore, since 1139 is divisible by more than one and itself, the answer to the
question "Is 1139 prime or composite?" is highlighted in blue below.
composite
Is 1140 prime or composite?
OK. Now you know that 1139 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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