Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 74: | \[{9^{74}-1\over8}\] | 2 × 5 × 149 × 18427 × 107671 × 953861 × 13097927 × 56737873 × 17189128703<11> × 142659759801404920771391593<27> |