Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 267: | \[{7^{267}-1\over6}\] | 3 × 19 × 1805633 × 18489605314740987765913<23> × 8166146875847876762859119015147004762656450569<46> × 2871385577390592352932558612960572694702993634318932174130446555537271<70> × 16348757507604568933635655654547668122475041674810379754026054447312447725274631<80> |