n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
186: | \[186!!!!-1\] | 2543 × 13009 × 74681431343119<14> × 2154778702947309067<19> × 78977372249605462727697236963621122835309881549<47> |