n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
181: | \[181!!!!-1\] | 22 × 234713 × 577563997 × 79591227652224647<17> × 416924417277337671027499<24> × 23597900239245439929832330007<29> |