Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 63: | \[{17^{63}-1\over16}\] | 19 × 43 × 127 × 307 × 13567 × 1270657 × 25646167 × 940143709 × 41643373496311819<17> × 37387216988215606147063933<26> |