www.mikescher.com/www/statics/euler/Euler_Problem-048.php

<?php

return 
[
	'number'      => 48,
	'date'        => '2014-12-12',
	'title'       => 'Self powers',
	'abbreviated' => false,
	'steps'       => 11530541,
	'time'        => 3728,
	'width'       => 37,
	'height'      => 3,
	'value'       => 9110846700,
];