Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[{23^{91}-1\over22}\] | 29 × 1093 × 5336717 × 47691619 × 480393499 × 12719053621<11> × 167490737060011<15> × 28874753842468645099777511117851<32> × 1575850427038837744926591856538221047697<40> |