Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 404: | \[{7^{404}-1\over6}\] | 24 × 52 × 607 × 809 × 6263 × 11717 × 230281 × 3843253 × 32844797 × 3197827057604018213085654261573091695006882483282822195620319110185314457<73> × 1226962153072980952980067096888460031879516017670288348423584305043494594529<76> × 26641033374694097694506816367325194021571185525190081757087471297080615573423409946145561217458250653355485807590595026668663474340460474484932482580050518449<158> |