Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 244: | \[{18^{244}-1\over17}\] | 52 × 13 × 19 × 977 × 6833 × 57829 × 65393 × 367831 × 703819 × 774136117 × 4110876980385153863<19> × 529719294127200118153<21> × 42043094784045697444762222723<29> × 66330542118642776825615248342578331139323<41> × 76327764753181217382678483177688887746094621957329<50> × 1450744996988333189921892673782384233809551686747567<52> × 5415438988352091599037443587646731111988036029825076317<55> |