Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 303: | \[{7^{303}-1\over6}\] | 3 × 19 × 607 × 809 × 1213 × 3637 × 6263 × 9354849642511833165720058628257<31> × 276052467777407518967272068222889<33> × 1226962153072980952980067096888460031879516017670288348423584305043494594529<76> × 789399196105242539027282686394411190089593714686612555816154880156963447374209067715329087191109177<99> |