Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
93: | \[{18^{93}-1\over17}\] | 73 × 311 × 12959 × 52081 × 1276827537047<13> × 9365578696924149281<19> × 2031563183945918294071<22> × 361794341647699905505399<24> × 51124582874452705456885351<26> |