Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 63: | \[{9^{63}-1\over8}\] | 72 × 13 × 19 × 37 × 43 × 127 × 547 × 757 × 883 × 1093 × 2269 × 2521 × 368089 × 550554229 × 144542918285300809<18> |