Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 178: | \[{22^{178}-1\over21}\] | 23 × 179 × 2137 × 4273 × 136883 × 15338922318626702817971349667<29> × 333826506151251038246163009989<30> × 567824339553055499078449689237387185186257286551690947477369394576296193830962947<81> × 284459488760341684300180667649788239692912396580968825138428395879767302088224679193<84> |