Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 259: | \[{18^{259}-1\over17}\] | 449 × 80207 × 157991 × 23794747402847<14> × 7484456915628841<16> × 10375318069755905859690041706382489471961<41> × [73012316501604880432794659886110113690891229737013605780121999289623319052852000801348689669692266157539318371811440914027044820814071465039818451493867974391762463807903599738834200126589466178868513905731954887558598453434480914833487333513<242>] |