n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 366: | \[366!!!!!+1\] | 661 × 8521 × 444872532284773146172736278488907<33> × 4860211191380495805779015506451322599883622472589950286547964922568463369542955193180007934099718858330555278991954271<118> |