Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 290: | \[{23^{290}-1\over22}\] | 23 × 3 × 31 × 41 × 59 × 211 × 233 × 1741 × 85087 × 292561 × 11410109 × 1075983677123<13> × 9550034760985541<16> × 356760584484267703279<21> × 2028795664420021044654173<25> × 21681035721798173134480290811916768306604332270047243531<56> × 1644053684741677343182925103202519659437854007234871021732292756274213188418875271<82> × 312041636040839313720657673181852223330007908029824795059224744520818636081018533360087490775573814813965111625472261299080080920158062480803222146271681<153> |