public static boolean sjekkDivisors(int tall) {
		int tall2 = tall + 1;
		int teller1 = 0;
		int teller2 = 0;
		for (int i = 0; i < primtall.size(); i++) {
			if (primtall.get(i) > tall/2)
				return (teller1 == teller2 && teller1 == 4);
			if (tall2%primtall.get(i) == 0)
				teller2++;
			if (tall%primtall.get(i) == 0)
				teller1++;
			if (tall2 % primtall.get(i) == 0 && tall % primtall.get(i) == 0)
				return false;
		}
		return false;
	}