Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 454: | \[{5^{454}-1\over4}\] | 2 × 3 × 863773591 × 17408515139<11> × 107857890714179<15> × 1769057265869086021<19> × 154907695140797990849<21> × 239976686263858506551<21> × 11015757643914646321123501403<29> × 16831369699997499687405534401<29> × 298963773893167948239115560463<30> × 114223618784447712095364474974480764422513325227090232439<57> × 13263706483839935039282091600845743927450307950710544046874853586856167990675671309<83> |