Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 161: | \[{6^{161}-1\over5}\] | 47 × 139 × 3221 × 10949 × 55987 × 593447 × 7505944891<10> × 491787574454982121<18> × 3358586137753609961516447641418203949<37> × 403733622730561138499463252012494935013<39> |