Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 75: | \[{9^{75}-1\over8}\] | 7 × 112 × 13 × 31 × 61 × 151 × 271 × 601 × 2551 × 4561 × 8951 × 9601 × 26251 × 119101 × 391151 × 1530601 × 22996651 × 2098303812601<13> |