Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 623: | \[{4^{623}-1\over3}\] | 43 × 127 × 179 × 59809 × 333929 × 62020897 × 390863971 × 18584774046020617<17> × 74383430474532481<17> × 618970019642690137449562111<27> × 74716964067758844321661890925503011337830328521<47> × 79674352522894354312422878450005263712074523824062110745148651289621350880376099320960953476231<95> × 167533981979589229303821877368142478936373365781547816846730915136908091300986218719708812171305110536487800307442293417476907051717464960921<141> |