Q: Is 321,003 a Prime Number?

A: No, 321,003 is not a prime number.

Why is 321,003 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 321003 can be evenly divided by 1 3 9 27 81 243 1,321 3,963 11,889 35,667 107,001 and 321,003, with no remainder.

Since 321,003 cannot be divided by just 1 and 321,003, it is not a prime number.

Number	321,001	321,002	321,004	321,005
Prime?	no	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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