Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[{16^{261}-1\over15}\] | 32 × 7 × 13 × 19 × 37 × 59 × 73 × 109 × 233 × 349 × 523 × 1103 × 2089 × 4177 × 7309 × 29581 × 3033169 × 107367629 × 536903681 × 6929826139<10> × 27920807689<11> × 9857737155463<13> × 22170214192500421<17> × 96076791871613611<17> × 3453412901832690553<19> × 33563856450515702761<20> × 88544086062101280800732676713543809008487793569<47> × 219681126844282487641411054552829164292094374447461<51> × 328017025014102923449988663752960080886511412965881<51> |