Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 423: | \[{28^{423}-1\over27}\] | 32 × 192 × 271 × 283 × 4231 × 6299 × 34123 × 119569 × 444979 × 895633 × 1208089 × 24128861 × 320601007 × 21277176429749<14> × 3425165712672937943<19> × 347263946374443738653441<24> × 191773449880214016325731433845127<33> × 208654959420127591616611553517941238404759672814194879456406216976867759957<75> × 509395273381913572330477366437566409610589406139089810184279050054360145810757137427736376137059495285578035342972625485714016778075103226640195391122271292067355185200895304411516574040534481977518369118241915289895056074299729492556279926189651184351877916903040249953690595976119934344843283300613904083994192767729341917919230016395535726954397407133917998994504701531571851029250411151<390> |