n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
238: | \[238!!!!-1\] | 2377 × 33353 × 124987 × 119188080035837<15> × 699890870659247<15> × 9669414134751323<16> × 100583502592794976622940648902016868487709103217751316693661<60> |