Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 178: | \[{6^{178}-1\over5}\] | 7 × 179 × 8011 × 2064441331 × 21777198152670085407545228412531133078179560879352228259<56> × 1437176850540020021056024701236917910178773041847685459251313907949<67> |