Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 68: | \[{9^{68}-1\over8}\] | 22 × 5 × 41 × 103 × 137 × 307 × 1021 × 1871 × 34511 × 956353 × 1743831169 × 6458150122561<13> × 3833564416504313<16> |