Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 66: | \[{12^{66}-1\over11}\] | 7 × 11 × 13 × 19 × 23 × 67 × 157 × 199 × 1453 × 5479 × 886381 × 5999137 × 266981089 × 661269577 × 39105782299<11> × 57154490053<11> |