Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 141: | \[{28^{141}-1\over27}\] | 3 × 271 × 283 × 6299 × 34123 × 119569 × 895633 × 24128861 × 320601007 × 21277176429749<14> × 3425165712672937943<19> × 347263946374443738653441<24> × 191773449880214016325731433845127<33> × 208654959420127591616611553517941238404759672814194879456406216976867759957<75> |