Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 284: | \[{28^{284}-1\over27}\] | 5 × 29 × 157 × 569 × 2651845457 × 25828494169<11> × 4252745790841<13> × 37313251966817<14> × 857600610882384989993501<24> × 250962707786649416977683047545011125829975942346091801<54> × 17123975315938930216190669396324911864968759608786602117843336208871513308687501<80> × 70219628495674730446108036288652141178194349554019309565885861211468641383876634360371486681484413970025494698800546673048689503613482310868628699335262248114021804658635399923718514597040645101996409<200> |