Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 107: | \[{28^{107}-1\over27}\] | 5525053 × 38391173 × 183787279483<12> × 6102359176190553076504783383990134923678943943876340342187<58> × 10918539363625499270097471425742171417215920531583185245373984580863157<71> |