<?php
//Prime Number calculato (just for fun)
	//DATABASE DETAILS
		$dbhost = 'localhost'; //host
		$dbname = "prime"; //name of database
		$dbusername = "root"; //username
		$dbpassword = "dbpass"; //pass
		$db = new PDO("mysql:host=$dbhost;dbname=$dbname;charset=utf8",$dbusername,$dbpassword,array(PDO::ATTR_EMULATE_PREPARES => false,PDO::ATTR_ERRMODE =>PDO::ERRMODE_EXCEPTION));

ini_set('memory_limit', '150M');
error_reporting(0);
ignore_user_abort(true);
set_time_limit(0);
$startnum = 834149;
$maxnum = 9999999999999999999999999;
$file = '/prime.txt';
$data = "NEW TEST \n starting number: ".$startnum."\n Ending number: ".$maxnum."\n";
file_put_contents($file, $data, FILE_APPEND | LOCK_EX);
echo "starting";

for($i = $startnum; $i < $maxnum; ++$i) {
if (!file_exists("/stop")) {
	$a = 0;
	while ($a < sqrt($i) + 1) {
	if ($a == 0) { //continue
	$a++;
	}
	elseif ($a == 1) { //continue
	$a++;
	}
	elseif ($a == $i) { //continue
	$a++;
	}
	else {
		$testnum = $i / $a;
		if ( strpos( $testnum, "." ) !== false ) {


        //Answer is decimal, continue
		if ($a > sqrt($i)) {
			$a++;
			$data = "\n PRIME NUMBER FOUND: ".$i." \n Allocated Memory: ".(memory_get_peak_usage(true)/1024/1024)." MiB \n Memory Usage: ".(memory_get_peak_usage(false)/1024/1024)." MiB\n\n";
			file_put_contents($file, $data, FILE_APPEND | LOCK_EX);
		$insert = $db->prepare("INSERT INTO `prime`(`number`) VALUES (:n)");
		$insert->bindParam(':n', $i);
		$insert->execute();
		usleep(2000);
			break;

		}
		$a++;
		}

		else {
			$a++;
			$data = "\n Not prime: ".$i;
			file_put_contents($file, $data, FILE_APPEND | LOCK_EX);
			break; //Not decimal, so number isn't prime
		}

	}
	}

	}
else {
file_put_contents($file, "\nSTOPPING TEST\n", FILE_APPEND | LOCK_EX);
exit();
}
}

?>