Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 77: | \[{23^{77}-1\over22}\] | 11 × 29 × 5336717 × 3937230404603<13> × 182688705194696220829<21> × 26463867183247157673754064782288107237804201852702279113008741<62> |