n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 197: | \[197!!!!+1\] | 2 × 443 × 659 × 20654017 × 3753475414644225279717703901<28> × 12470761378684956253368891641920868475566891816676847<53> |