Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 75: | \[{8^{75}-1\over7}\] | 31 × 73 × 151 × 601 × 631 × 1801 × 23311 × 100801 × 115201 × 617401 × 10567201 × 1348206751 × 13861369826299351<17> |