n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
177: | \[177!!!!+1\] | 2 × 526117 × 1458707 × 60796900319<11> × 2632749433376519<16> × 207934103897027587<18> × 45921649596803477635403761<26> |