Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
82: | \[{18^{82}-1\over17}\] | 19 × 83 × 168347 × 3811279 × 114341047 × 4354359491<10> × 24997711153<11> × 101230436110007637061337<24> × 394867037344695962525971723264825927<36> |