Q: Is 428,003 a Prime Number?

A: Yes, 428,003 is a prime number.

Why is 428,003 a prime number?

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

The number 428003 can be evenly divided by 1 and 428,003, with no remainder.

Since 428,003 can be divided by just 1 and 428,003, it is a prime number.

Number	428,001	428,002	428,004	428,005
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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