Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 69: | \[{12^{69}-1\over11}\] | 47 × 157 × 39891250417<11> × 321218438243<12> × 6279903241741823809<19> × 44512779475648508632485424501<29> |