Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
89: | \[{22^{89}-1\over21}\] | 179 × 2137 × 4273 × 15338922318626702817971349667<29> × 567824339553055499078449689237387185186257286551690947477369394576296193830962947<81> |