Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
139: | \[{18^{139}-1\over17}\] | 766169 × 541014689 × 3673904096631593189690128995143882476819326980784414950924123497<64> × 117426965980849393281569643757057004998889173896081274062492557449314233557358360862114890774959<96> |