Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 53: | \[{20^{53}-1\over19}\] | 593071 × 24540050076369381718561<23> × 3257272076316750353139146661697870498891<40> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 53: | \[{20^{53}-1\over19}\] | 593071 × 24540050076369381718561<23> × 3257272076316750353139146661697870498891<40> |