Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 208: | \[{23^{208}-1\over22}\] | 26 × 3 × 5 × 17 × 53 × 157 × 313 × 1873 × 3697 × 139921 × 623009 × 836369 × 1117793 × 2861561 × 47691619 × 278640181 × 480393499 × 9542916688241<13> × 3829141917458729<16> × 21001515080686141<17> × 736868920565558735424457780790315662459263032384484327940915657<63> × 3183420693479274478225515768163991816011172268172959982132726448042985056316406190141066687699137099601<103> |