Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
169: | \[{7^{169}-1\over6}\] | 16148168401<11> × 1452979915402500135854417362573926368874134931212567<52> × 471014884186461786359976424959315520118992312411810290816288422077055549979204503<81> |