Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 109: | \[{4^{109}-1\over3}\] | 104124649 × 745988807 × 870035986098720987332873<24> × 2077756847362348863128179<25> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 109: | \[{4^{109}-1\over3}\] | 104124649 × 745988807 × 870035986098720987332873<24> × 2077756847362348863128179<25> |