Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 204: | \[{28^{204}-1\over27}\] | 3 × 5 × 13 × 29 × 103 × 137 × 157 × 239 × 271 × 613 × 757 × 2347 × 2857 × 8807 × 33049 × 47221 × 57427 × 561870469 × 45508138747<11> × 8061059901399457<16> × 148020807352107352204781<24> × 412037760199357579738273<24> × 4493911532793397608107303677360753164689<40> × 21099744001697087505351553822406156421454436701<47> × 258893502975564514605905427082533769723447792874488735287118938218501005069483477<81> |