Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 122: | \[{18^{122}-1\over17}\] | 19 × 367831 × 703819 × 4110876980385153863<19> × 42043094784045697444762222723<29> × 66330542118642776825615248342578331139323<41> × 1450744996988333189921892673782384233809551686747567<52> |