www.mikescher.com/www/statics/euler/Euler_Problem-006.php

<?php

return 
[
	'number'      => 6,
	'date'        => '2014-09-11',
	'title'       => 'Sum square difference',
	'abbreviated' => false,
	'steps'       => 18897151,
	'time'        => 7347,
	'width'       => 72,
	'height'      => 16,
	'value'       => 25164150,
];