Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
40: | \[{17^{40}-1\over16}\] | 23 × 32 × 52 × 11 × 29 × 41 × 71 × 101 × 21881 × 41761 × 63541 × 88741 × 1186844128302568601<19> |