Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
143: | \[{28^{143}-1\over27}\] | 53 × 859 × 5242381 × 6077039 × 50545507 × 88440353 × 4543753614603737<16> × 4230382497214749175565322370827229<34> × 165110049920843462221312019272275955104957595751425961<54> × 1580680648373538364038167410599561746064227775742364011470069056302207<70> |