Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 97: | \[{6^{97}-1\over5}\] | 389 × 1747 × 1586365166597<13> × 18969653181299397175271<23> × 29579867253585988507046633033646287<35> |