www.mikescher.com/www/statics/euler/Euler_Problem-004.php

<?php

return 
[
	'number'      => 4,
	'date'        => '2014-09-11',
	'title'       => 'Largest palindrome product',
	'abbreviated' => false,
	'steps'       => 230611114,
	'time'        => 77813,
	'width'       => 71,
	'height'      => 6,
	'value'       => 906609,
];