Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 607: | \[{4^{607}-1\over3}\] | 115331 × 202769117249<12> × 16780869326776069043<20> × 1622949422129340362249<22> × 1956783675173062584155810896697<31> × 142061366373466838976870126736192084529788567581972935261638677786736545303496932385392586871843<96> × 531137992816767098689588206552468627329593117727031923199444138200403559860852242739162502265229285668889329486246501015346579337652707239409519978766587351943831270835393219031728127<183> |