isPrime?

//Usage: g++ isPrime.cpp -std=c++0x -DmaxNumber=XX

template <int Num, int Now=Num-1>
struct isPrime
{
    const static bool Ask =
        Num%Now==0 ? false : isPrime<Num, Now-1>::Ask;
};

template <int Num>
struct isPrime<Num, 1>
{
    const static bool Ask=true;
};

template <int Num>
struct Try
{
    Try<Num-1> Fake;
    static_assert(!isPrime<Num>::Ask, "is a prime number.");
};

template <>
struct Try<1>
{
};

int main(int argc, char* argv[])
{
    //enum {maxNumber=10};
    Try<maxNumber>();
    return 0;
}