Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
40: | \[{22^{40}-1\over21}\] | 52 × 23 × 41 × 73 × 97 × 181 × 401 × 3209 × 150901 × 224071 × 245411 × 305490121 × 240425214401<12> |