Problem 10

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

Find the sum of all the primes below two million.

 

JAVA:

public class P010 {

public static void main(String[] args){

long sum = 0;

for(int i=2;i<2000000;i++){

if(isprime(i)){

sum+=i;

}

}

System.out.print(sum);

}

public static boolean isprime(int n){

for(int i=2;i*i<=n;i++){

if(n%i==0){

return false;

}

}

return true;

}

}