Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
70: | \[{18^{70}-1\over17}\] | 11 × 19 × 41 × 71 × 211 × 449 × 2711 × 9041 × 80207 × 117251 × 3052211 × 4179001 × 4274201 × 32222107 × 4476462481<10> × 4164889456901862302881<22> |