Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 117: | \[{17^{117}-1\over16}\] | 19 × 157 × 307 × 38611 × 212057 × 1270657 × 2919196853 × 152688950198616547<18> × 2035325753852213746064248693<28> × 6633080597476280489507015864997548520193872646710703552291437987433<67> |