Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 72: | \[{12^{72}-1\over11}\] | 5 × 7 × 13 × 19 × 29 × 37 × 73 × 89 × 157 × 193 × 233 × 1657 × 1801 × 20593 × 80749 × 2227777 × 2231857 × 3684845809 × 9666387937<10> × 122138321401<12> |