Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 495: | \[{18^{495}-1\over17}\] | 73 × 23 × 31 × 41 × 199 × 601 × 991 × 2311 × 2711 × 16127 × 34327 × 51217 × 558721 × 3611719 × 8055631 × 50790191 × 1225046791 × 25158058915441<14> × 125500908706801<15> × 4893407785654797223<19> × 9248736485328687271<19> × 13438788059968469551<20> × 180281596523246195671<21> × 12042065697120681040605799<26> × 24079647987394646183428194161<29> × 430892998397907888091194741841<30> × 1338029376807245057016053427001<31> × 6190865663281639524678619528967191<34> × 117206168731902676796790484884706056816111011068777<51> × [15023839888740763025720479138346164469217288641253049509554145156725690769031695425997536355695035318892990259206735216649357026128629039479409323653730442001671148271377033819011078341376058893740182346264415122683220855755774959482937592166154361<248>] |