To determine if 781 is a prime number or a composite number, we simply look at the factors for 781.
If the factors of 781 are only 781 and 1, then we know that 781 is a prime number. Otherwise, 781 is a composite number.
To explain better, if 781 is only divisible by 1 and 781, then it is a prime number, and if 781 is divisible by more than 781 and 1, then it is a composite number.
The factors of 781 are as follows:
1, 11, 71, 781
Therefore, since 781 is divisible by more than one and itself, the answer to the
question "Is 781 prime or composite?" is highlighted in blue below.
composite
Is 782 prime or composite?
OK. Now you know that 781 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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