n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 212: | \[212!!!!!+1\] | 827 × 857 × 15451 × 20963 × 65287 × 216107 × 93895460882158567<17> × 2706347448089234143<19> × 3927806194082189563423<22> |