Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 497: | \[{4^{497}-1\over3}\] | 43 × 127 × 6959 × 228479 × 48544121 × 56409643 × 212885833 × 145915152433<12> × 254461617383<12> × 13952598148481<14> × 5213526568247671787<19> × 8705752060803157813200086999866476019<37> × 608515182984165249341377295189029256213261956947549818345411<60> × 770557961761093801278718793937377574043943382342011514028393021874470913652376022233958616983382625535943227047<111> |