Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
118: | \[{21^{118}-1\over20}\] | 2 × 11 × 896447 × 334217419 × 3085597813 × 47540111129611360301<20> × 3599933694931243085497791696053868938364103<43> × 15106936038203961355993446093478189757934421447231148098564025562337<68> |