Pattern Editing mode lets the user create swatch tiles over 4000px, but does not give you the size of the tile over 4000px. I noticed this first with rectangular pattern that was forcing my computer to crash on edit. I confirmed this behavior by opening a new file creating a 60 in by 60 in square. Pattern was created fine, but the width and height of the swatch still maxed out at 4000px. AI 2018 22.1