Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 280: | \[{16^{280}-1\over15}\] | 5 × 11 × 17 × 29 × 31 × 41 × 43 × 71 × 113 × 127 × 257 × 281 × 449 × 2689 × 4481 × 5153 × 61681 × 65537 × 86171 × 122921 × 414721 × 557761 × 736961 × 7416361 × 15790321 × 16824641 × 47392381 × 86800001 × 183076097 × 4278255361 × 54410972897<11> × 44479210368001<14> × 358429848460993<15> × 40396092614384641<17> × 40809065233184155116161<23> × 84179842077657862011867889681<29> × 3421249381705368039830334190046211225116161<43> × 16366786575293487168163210961641150954650165468880710178578881<62> |