private static void testPrimes() {
		for (int i = 0 ; i < primes.length ; i ++){
			for (int j = 0 ; j < i ; j ++){
				
				int sum = 0;
				for (int k = j ; k < i ; k ++){
					if (sum != primes[i]){
						sum += primes[k];
					}
					
				}
				if (sum == primes[i]){
					System.out.print("found : "+sum+ " ");
				}
			}
		}
	}