n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
195: | \[195!!!!-1\] | 2 × 449 × 21820148754694344252075594704111288947763<41> × 3028643022879150266735728819702803230621714503051<49> |