n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
198: | \[198!!!!-1\] | 2281 × 1733327 × 10773470029660903<17> × 18024013478779381<17> × 3996831905597971966626946629993448503549549302723539<52> |