User blog comment:GamesFan2000/There aren't enough particles in the universe to solve a four-entry array/@comment-29915175-20181129141807/@comment-30754445-20181129145020

Fun fact:

If the universe is infinite, the amount of space which is required to reduce {4,4,4,4} into 3-entry arrays probably contains countless exact copies of yourself (about {4,4,4,4} copies, in fact).

Source (Numberphile video):

https://www.youtube.com/watch?v=8GEebx72-qs

(the actual "copy of yourself" thing begins at time index 4:15)