Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 85: | \[{22^{85}-1\over21}\] | 239 × 245411 × 4363561 × 74729519 × 176634767651<12> × 17989008180100667691087044555772784535535736604655195356475970322558365768588051<80> |