Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 237: | \[{28^{237}-1\over27}\] | 3 × 271 × 317 × 113287 × 5452897 × 419483839 × 17135578267<11> × 14499091194787<14> × 480017111116436011<18> × 589313263529964782995329801507579750620293837153256673100250966378714860373275073567118363081027037391<102> × [74743730615255257855617814970045345916076383300487938072270948958493901382976948380109267972270641750570281952593947788066083700904401083182822607901294161097181652835462729<173>] |