n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 289: | \[289!!!!+1\] | 2 × 14783 × 125340361 × 131527002507450290671591675925091793011477426629139165316543297<63> × 9023355682199381521999615094219512726039552774066400383836304582101076783<73> |