Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 367: | \[{4^{367}-1\over3}\] | 2203 × 12479 × 19819 × 51791041 × 78138581882953<14> × 146264881313513<15> × 20837062885084633147<20> × 301311116540899114446723859201<30> × 460233616861852066165180033789571<33> × 1636198597169607245088331633873083979<37> × 19755740081951910036006278827509875120092863638283602681<56> |