Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
80: | \[{9^{80}-1\over8}\] | 24 × 52 × 112 × 17 × 41 × 61 × 193 × 1181 × 14401 × 8194721 × 21523361 × 42521761 × 700984481 × 128653413121<12> × 597747428754241<15> |