Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 321: | \[{28^{321}-1\over27}\] | 3 × 271 × 643 × 6421 × 9631 × 2390809 × 5525053 × 38391173 × 183787279483<12> × 6102359176190553076504783383990134923678943943876340342187<58> × 10918539363625499270097471425742171417215920531583185245373984580863157<71> × [63635323156446888241367189130373321096061653125622839248366905089841361111640294010133794088596675605196776869813148780702367438050288246201404194348003196832720637279384756332072132982769154408909449487955756420729291772188988783066392251758622999054076395201063661863332259181450506533197<290>] |