Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
55: | \[{23^{55}-1\over22}\] | 11 × 292561 × 3468301 × 3937230404603<13> × 812253463461249630584835663935634811279798920421<48> |