Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 55: | \[{8^{55}-1\over7}\] | 23 × 31 × 89 × 151 × 881 × 3191 × 201961 × 599479 × 2048568835297380486760231<25> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 55: | \[{8^{55}-1\over7}\] | 23 × 31 × 89 × 151 × 881 × 3191 × 201961 × 599479 × 2048568835297380486760231<25> |