Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 99: | \[{12^{99}-1\over11}\] | 11 × 23 × 37 × 157 × 397 × 3169 × 80749 × 886381 × 5999137 × 266981089 × 661269577 × 9143902271574719666671109149<28> × 4895296942204991493950514043177<31> |