Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 505: | \[{7^{505}-1\over6}\] | 607 × 809 × 2801 × 6263 × 2614117351 × 1241488230332561<16> × 11455271174694488714225754978352864073411049741655411<53> × 1226962153072980952980067096888460031879516017670288348423584305043494594529<76> × [2523608584600902894228095125062468969680203298480091043469061894705400037402248219855635667006245576791160012361892563384698945347587294985285433863071116485824727926605712407171847830111150738320224377427912989267426259116388299572498091508912352980717977593981<262>] |