Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
57: | \[{22^{57}-1\over21}\] | 3 × 132 × 2281 × 30097 × 45943 × 200983 × 341203 × 734186407417<12> × 97404596002423<14> × 200188789766890632521557<24> |