Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 73: | \[{22^{73}-1\over21}\] | 293 × 1585760683434492728054623403870583591611<40> × 10174923178868967884983015175295518086105255580386628197<56> |