n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 248: | \[248!!!!!+1\] | 53 × 515861 × 5868836579095031677168372842061710848200687979586060896195163275283554830905511290508387009<91> |