www.mikescher.com/www/statics/euler/Euler_Problem-099.php

<?php

return 
[
	'number'      => 99,
	'date'        => '2017-01-13',
	'title'       => 'Largest exponential',
	'abbreviated' => true,
	'steps'       => 5072021,
	'time'        => 1107,
	'width'       => 63,
	'height'      => 1000,
	'value'       => 709,
];