Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 556: | \[{18^{556}-1\over17}\] | 52 × 13 × 19 × 557 × 376969 × 766169 × 235241099 × 541014689 × 95799161123<11> × 1125273264569<13> × 143644541940923<15> × 405047401958449<15> × 6305272033127435009<19> × 957537989461179379909<21> × 37654610501023348430122715132141<32> × 1576705255703450478937041003861437<34> × 1845165643202965122726830392215511912061<40> × 6922970552141114417725384165071890565964328951798809497417581<61> × 3673904096631593189690128995143882476819326980784414950924123497<64> × 117426965980849393281569643757057004998889173896081274062492557449314233557358360862114890774959<96> × 73021376236918508512455227636390037823349162529040864143253559623303592773048933592398923126999376645259943995521628581<119> × 43924069825323511629246610671900762271794972280779353522295358911923707663703625381882003481202385857582596238316911052617082793<128> |