Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 414: | \[{18^{414}-1\over17}\] | 73 × 19 × 47 × 73 × 139 × 307 × 599 × 991 × 3313 × 4831 × 21529 × 21943 × 34327 × 465841 × 7468009 × 131637097 × 29214301092553<14> × 20801237997245359<17> × 824418892380831861979<21> × 237412496364593810296681<24> × 3913037558632733048069409307<28> × 47425584012916444409713229683<29> × 81666738358295147130408618438958417881229024866001<50> × 3335831283765997129468848570484932171598514072932729<52> × 140946324861872125757848531150859837409138117700687286630854927<63> × 4966439332899474213725693912524475200086689667116620509790051227712190606643300127508813859229862499459519538746058079850551713885787080383226373773834030130889192649<166> |