Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 68: | \[{12^{68}-1\over11}\] | 5 × 13 × 29 × 2551 × 2693651 × 74876782031<11> × 79471453801<11> × 66900193189411<14> × 427152748915310957418697<24> |