Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 245: | \[{9^{245}-1\over8}\] | 112 × 61 × 71 × 491 × 547 × 1093 × 4019 × 8233 × 32341 × 51157 × 131713 × 174931 × 857643277 × 2664097031 × 127522693159<12> × 374857981681<12> × 819789872274420135934308710915667205517989021684165907428156482710442517771<75> × 4430152977536859072181134657493233649089245714747389001639572141363110009421<76> |