n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 234: | \[234!!-1\] | 257 × 20403998194337<14> × 250045022847027230243591<24> × [503067789421306170572602664754051369982244594744998028539438994567361580766589216533969627469351792311006519735051810674811778934911008163205054133005048675961260072256248828507590352945321<189>] |