Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 84: | \[{9^{84}-1\over8}\] | 22 × 5 × 72 × 13 × 29 × 41 × 43 × 73 × 337 × 547 × 673 × 1009 × 1093 × 2269 × 2857 × 6481 × 16493 × 167329 × 368089 × 430697 × 647753 × 109688713 × 2108826721 |