To determine if 1580 is a prime number or a composite number, we simply look at the factors for 1580.
If the factors of 1580 are only 1580 and 1, then we know that 1580 is a prime number. Otherwise, 1580 is a composite number.
To explain better, if 1580 is only divisible by 1 and 1580, then it is a prime number, and if 1580 is divisible by more than 1580 and 1, then it is a composite number.
The factors of 1580 are as follows:
1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580
Therefore, since 1580 is divisible by more than one and itself, the answer to the
question "Is 1580 prime or composite?" is highlighted in blue below.
composite
Is 1581 prime or composite?
OK. Now you know that 1580 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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