Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 155: | \[{6^{155}-1\over5}\] | 5 × 311 × 5333 × 3559267608341<13> × 49744740983476472807<20> × 208210289142572055121<21> × 2686345232069105360022926492125783168511035955840811134515391<61> |