n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
163: | \[163!!+1\] | 22 × 2080577 × 90598732321<11> × 189660302973727977616792621811736445475604721512153578576738273396134470283436247851335851450225877560129079111176303439425012857<129> |