Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 217: | \[{28^{217}-1\over27}\] | 113 × 10789 × 1675799 × 4422461 × 14307617 × 680334432770413<15> × 104175305182941687128096479<27> × [436444397156854051403985511588732786487107210263472777011049993332699339669045957133343049251863234200776473597595618734672760576873738739929402479926435830664802354236059261290376853000432285991278287542991747802205045095027117413490290027097433<246>] |