User blog comment:Mush9/Sebastian's number/@comment-24920136-20161009173607/@comment-24920136-20161009193627

Not just the largest, i'd say even reaching the top 15 largest rank would be an incredible feat, and quite hard (it would take very deep knowledge of math's foundations ie: things such as What actually is a number? and so )

Personally, as i'm just an amateur and not really studied in math,  i just find it really fun to try and make big numbers anyway, even if they arent the biggest of them all

also, i share your feeling of mind blown by these numbers, the truth is the more you learn and do research about their bigness the more they stump you