Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
50: | \[{17^{50}-1\over16}\] | 2 × 32 × 11 × 71 × 101 × 2551 × 5351 × 88741 × 26278001 × 11330289301<11> × 4064228544226537005066401<25> |