Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 159: | \[{8^{159}-1\over7}\] | 73 × 6361 × 6679 × 69431 × 94447 × 4879711 × 13960201 × 20394401 × 242003089 × 540701761 × 229890275929<12> × 65586217086670450494078662927314573302495970658410743708933357885437868217<74> |