public static void main( String[] args )
    {
        int limit = 2000000;
        boolean[] primes = new boolean[( limit + 1 )];
        primes[0] = false;
        primes[1] = false;
        for ( int x = 2; x < ( limit + 1 ); x++ )
        {
            primes[x] = true;
        }
        long sum = 0;
        int x = 3;

        for ( int index = 2; ( index * index ) <= limit; index++ )
        {
            while ( !primes[index] )
            {
                index++;
            }

            x = index * ( index - 1 );
            if ( x <= limit - index )
            {
                x = x + index;
                primes[x] = false;
                System.out.println( "marking " + x + " as false" );
            }

        }

        for ( int index = 2; index < limit; index++ )
        {
            while ( !primes[index] )
            {
                index++;
                if ( index == limit )
                {
                    break;
                }
            }
            sum = sum + index;
            System.out.println( "adding " + index + '\t' + "current sum is "
                + sum );
        }
        sum = sum - limit;
        System.out.println("subtracting the limit");
        System.out.println( "The sum is " + sum );