Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 218: | \[{18^{218}-1\over17}\] | 19 × 223795967 × 8953511131739512054889<22> × 163382228315181914965513289<27> × 29206017033755091451623143713<29> × 169490612692287574588118884321<30> × 79311852451376930523623479340189677181061504609802246883<56> × 107447685280516359778741119907177002168028417976636782583096917794952275008161692632021392116814838377<102> |