Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 225: | \[{18^{225}-1\over17}\] | 73 × 31 × 41 × 151 × 601 × 991 × 1801 × 2711 × 34327 × 558721 × 602401 × 106487551 × 794010601 × 78180455401<11> × 52745811435001<14> × 21162386787273369601<20> × 1425616856701549185601<22> × 129278406971133461403718040401<30> × 1338029376807245057016053427001<31> × 241508817713952749319865534915659720898360211091151<51> × 165286280675668275834679549389769451958294090707563351<54> |