Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 431: | \[{8^{431}-1\over7}\] | 863 × 3449 × 36238481 × 76859369 × 558062249 × 4642152737<10> × 2612439750169<13> × 142850312799017452169<21> × 73475684245644536575389673549407942112577575745833<50> × 1807482391092819529831423005040763105191863029850140579776353298087457<70> × 22885916019013870684780823812103215790562520450887078940697459225594064493227480393048764730727113430975573008955632397743584436374400979854298627506814739744335626253507292178334556062102895878327<197> |