n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 305: | \[305!!!!-1\] | 23 × [4392046513092343825140642329739844803694684348668107745467566168302008924752507964335781704281563988195025358577949126704086663544767091511399376392364501953<157>] |