To determine if 1819 is a prime number or a composite number, we simply look at the factors for 1819.
If the factors of 1819 are only 1819 and 1, then we know that 1819 is a prime number. Otherwise, 1819 is a composite number.
To explain better, if 1819 is only divisible by 1 and 1819, then it is a prime number, and if 1819 is divisible by more than 1819 and 1, then it is a composite number.
The factors of 1819 are as follows:
1, 17, 107, 1819
Therefore, since 1819 is divisible by more than one and itself, the answer to the
question "Is 1819 prime or composite?" is highlighted in blue below.
composite
Is 1820 prime or composite?
OK. Now you know that 1819 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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