Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 348: | \[{4^{348}-1\over3}\] | 3 × 5 × 7 × 13 × 17 × 59 × 233 × 241 × 349 × 1103 × 2089 × 4177 × 29581 × 59393 × 82129 × 3033169 × 107367629 × 536903681 × 27920807689<11> × 9857737155463<13> × 10389476529713761<17> × 22170214192500421<17> × 96076791871613611<17> × 59372021171164475019217<23> × 565288195624678452623377<24> × 82280195167144119832390568177<29> |