I have noticed that Np++ is not highlighting PHP's source code properly. This occurs from time to time and I was just ignoring it, but now I would like to post it. Code below is an example, copy it to Your Np++. Also look at attachments. I have tested it on several styles, as also at Np++ demo page (http://notepad-plus-plus.org/demo.html).
<?php //$a = '2'; //$n = '57885161'; $a = '4294967296'; $n = '1808911'; //echo bcsub(bcpow($a, $n, 0), '1', 0); $TStart = microtime(true); $l = bcsub(bcmul('512', bcpow($a, $n, 0), 0), '1', 0); $TEnd = microtime(true) - $TStart; echo $TEnd.'<br />'; echo $l; ?>