Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 194: | \[{28^{194}-1\over27}\] | 29 × 389 × 971 × 11811109 × 26387299 × 1077512962627<13> × 709631467209875315796771044618306561153982255910640419690230176559964795222396960041765720122712469579101140989664777<117> × 795401677897930484299201663590387252223663785613499239312027910747885558034477362663957428176284430077676935599931776434458904731<129> |