To determine if 1065 is a prime number or a composite number, we simply look at the factors for 1065.
If the factors of 1065 are only 1065 and 1, then we know that 1065 is a prime number. Otherwise, 1065 is a composite number.
To explain better, if 1065 is only divisible by 1 and 1065, then it is a prime number, and if 1065 is divisible by more than 1065 and 1, then it is a composite number.
The factors of 1065 are as follows:
1, 3, 5, 15, 71, 213, 355, 1065
Therefore, since 1065 is divisible by more than one and itself, the answer to the
question "Is 1065 prime or composite?" is highlighted in blue below.
composite
Is 1066 prime or composite?
OK. Now you know that 1065 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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