Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 163: | \[{18^{163}-1\over17}\] | 83519897 × 954077143 × 460220533264379449<18> × 657150340817630535751823<24> × 4251032259169521505833244313<28> × 1703876868956679644571293566676233<34> × 1370984776196118693560516204377382677936095905643115529114369449124549732843608196951<85> |