Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 625: | \[{4^{625}-1\over3}\] | 11 × 31 × 251 × 601 × 1801 × 4051 × 229668251 × 269089806001<12> × 619324035675566251<18> × 1277297679372570001<19> × 4710883168879506001<19> × 5519485418336288303251<22> × 232983411264923603130001<24> × 573759820507018639639785001<27> × 983262166270913562877993411320001<33> × 18152902839291497575027462639977160832701118299213751<53> × 246053469753590746981511859818675718355368494592178751<54> × 23072017280360209143853190404178284560740949254655131346786858037350918591251<77> |