Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 59: | \[{21^{59}-1\over20}\] | 896447 × 334217419 × 47540111129611360301<20> × 3599933694931243085497791696053868938364103<43> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 59: | \[{21^{59}-1\over20}\] | 896447 × 334217419 × 47540111129611360301<20> × 3599933694931243085497791696053868938364103<43> |