Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
59: | \[{17^{59}-1\over16}\] | 1063 × 1889 × 1365581260423071390161<22> × 90008517325328860435221505121015340220148461<44> |