Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 226: | \[{28^{226}-1\over27}\] | 29 × 227 × 80802233 × 9672514872073<13> × 11826254004041<14> × 10187624639004991690212948315542859797567093503346882221729741137665378426618223162469001008285347005320114865528228449948394708452521317<137> × 68240870391326438539013755784212436485874641626523595423711463930695961173063562533807774197709197400368627644128902600382685846913933825662940743184871<152> |