Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 193: | \[{8^{193}-1\over7}\] | 13821503 × 61654440233248340616559<23> × 14732265321145317331353282383<29> × 22515432112225416692730880057224922174331279583123112381686532545779094349645216289214782907481695324873634290036151<116> |