Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 140: | \[{16^{140}-1\over15}\] | 5 × 11 × 17 × 29 × 31 × 41 × 43 × 71 × 113 × 127 × 257 × 281 × 4481 × 5153 × 61681 × 86171 × 122921 × 557761 × 736961 × 7416361 × 15790321 × 47392381 × 4278255361 × 54410972897<11> × 84179842077657862011867889681<29> × 3421249381705368039830334190046211225116161<43> |