n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
185: | \[185!!!!-1\] | 22 × 103 × 433817326417<12> × 4177641047235830039<19> × 105203367363617869073271343862519941938153255263826829<54> |