n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
242: | \[242!!!!!+1\] | 769733 × 7158803 × 29113241 × 28993846753<11> × 180554699753<12> × 560111718528103144525356718579383982466900908254783103<54> |