echo "<h1>9</h1>";
	$f = fopen("failid/algarv.txt","c+");
	if($f){
		$arv = fgets($f);
		if(!$arv){
			fwrite($f,2);
			fclose($f);
		}else{
			function primeCheck($number){
				if ($number == 1)
				return 0;
				for ($i = 2; $i <= $number/2; $i++){
					if ($number % $i == 0)
						return 0;
				}
				return 1;
			}
			do{
				$arv++;
			}while(!primeCheck($arv));
			fclose($f);
			$f= fopen("failid/algarv.txt","w");
			fwrite($f,$arv);
			fclose($f);
		}
	}