n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 393: | \[393!!!!-1\] | 22 × 182489261 × 1087444483 × 26262847063<11> × 71555051048559459517<20> × [2206669122166148812395550012304558194230358533830256386074426711049678424699144729307199360462558967337038076129364921854112431040887343559527585474198197518231386647<166>] |