Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 351: | \[{8^{351}-1\over7}\] | 73 × 79 × 937 × 2593 × 6553 × 8191 × 71119 × 86113 × 121369 × 262657 × 446473 × 29121769 × 44207047 × 97685839 × 7830118297<10> × 571890896913727<15> × 93715008807883087<17> × 150832426800173710177<21> × 24295813738965169951447<23> × 1087462356189876289004689354796614348274006078814498030640327092526658434963230524957873956666997547232750552140796842174321721246657755700352130594440092712731927009<166> |