Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 175: | \[{18^{175}-1\over17}\] | 41 × 71 × 449 × 2711 × 11551 × 80207 × 602401 × 4274201 × 1006771151 × 21162386787273369601<20> × 4164889456901862302881<22> × 142822063586538248694069751<27> × 2584370247496860154290248241584011972073735874496310270143807938005181117556112664026633914278733903587304242551<112> |