/*

The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.

Find the sum of all the primes below two million.

*/

class Problem_10 {

public static boolean isPrime(long n)

{

if (n < 2) {return false;}

else if (n == 2) {return true;}

for (int a = 3; a < Math.sqrt(n) + 1; a += 2)

{

if (n % a == 0)

{

return false;

}

}

return true;

}

public static void main(String[] args)

{

long s = 2;

int b;

for(b = 3; b < 2000000; b += 2)

{

if(isPrime(b)== true)

{

s = s + b;

}

}

System.out.println(s);

}

}