Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 353: | \[{8^{353}-1\over7}\] | 931921 × 18861552481<11> × 2927455476800301964116805545194017<34> × 4067055143413119297753219773293999460854231105692799<52> × 6327019834650802405813498384839000872342691100400396876643368617<64> × 6725414756111955781503880188940925566051960039574573675843402666863<67> × 99088260776220699594448458777855218714320305439238757136382290554456612385774647423937<86> |