Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 230: | \[{18^{230}-1\over17}\] | 11 × 19 × 41 × 47 × 599 × 2711 × 9041 × 24841 × 7468009 × 20801237997245359<17> × 82393874808821351987834521<26> × 1930773408050211089575377161<28> × 3913037558632733048069409307<28> × 7516342403453194393474042331<28> × 852225206949910852975030976655459189356098014820921<51> × 3336277510305777441247543696294496479366253454467592530568949945380908802489179473831<85> |