Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 479: | \[{4^{479}-1\over3}\] | 3833 × 38321 × 33385343 × 6293443049<10> × 7241702191810014332930493433<28> × 54657255048286677488033160851148008819<38> × 683481445118041278287416124073722711169070307627777892361<57> × 8949165452964212284287352856184599901847368613984178988013861910189833<70> × 10869186607773319558730501484452015470992764113369214593828236615596881<71> |