Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 30: | \[{28^{30}-1\over27}\] | 3 × 11 × 29 × 31 × 271 × 757 × 4621 × 15991 × 53951 × 637421 × 734941 × 84673681 |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 30: | \[{28^{30}-1\over27}\] | 3 × 11 × 29 × 31 × 271 × 757 × 4621 × 15991 × 53951 × 637421 × 734941 × 84673681 |