n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
294: | \[294!!!!!+1\] | 52 × 491 × 36329256429768953099<20> × 5052675053015500854114123355317499063<37> × 4051888848553347455938899038681247508153774932599654076756727<61> |