n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 212: | \[212!!!!+1\] | 433 × 1759 × 502868389210711394701036714844054230092671921323<48> × 905515169301277578795185598434263787258705709421<48> |