Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
299: | \[{3^{299}-1\over2}\] | 47 × 599 × 797161 × 10997221 × 1001523179 × 2886381073947332989<19> × 8661965714512154562493<22> × 3691818618067089153032376872670263730514071816623029355312994160640382894707<76> |