Q: Is 100,005 a Prime Number?

A: No, 100,005 is not a prime number.

Why is 100,005 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 100005 can be evenly divided by 1 3 5 15 59 113 177 295 339 565 885 1,695 6,667 20,001 33,335 and 100,005, with no remainder.

Since 100,005 cannot be divided by just 1 and 100,005, it is not a prime number.

Number	100,003	100,004	100,006	100,007
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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