Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 56: | \[{12^{56}-1\over11}\] | 5 × 13 × 29 × 89 × 211 × 233 × 659 × 673 × 4943 × 13063 × 13156924369<11> × 79493013628273739882868481<26> |