Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
89: | \[{9^{89}-1\over8}\] | 179 × 264331 × 1125706177 × 1611479891519807<16> × 5042939439565996049162197<25> × 2444322641415331355533344283<28> |