n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 274: | \[274!!!!+1\] | 139 × 4337 × 14506252041548625193938879961<29> × 1849295769037719913189366029781<31> × 249973712221424075993191236970314701207382403873681885888852470504337036127<75> |