Q: Is 200,005 a Prime Number?

A: No, 200,005 is not a prime number.

Why is 200,005 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 200005 can be evenly divided by 1 5 13 17 65 85 181 221 905 1,105 2,353 3,077 11,765 15,385 40,001 and 200,005, with no remainder.

Since 200,005 cannot be divided by just 1 and 200,005, it is not a prime number.

Number	200,003	200,004	200,006	200,007
Prime?	yes	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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