Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 375: | \[{4^{375}-1\over3}\] | 3 × 7 × 11 × 31 × 151 × 251 × 331 × 601 × 751 × 1801 × 2251 × 4051 × 100801 × 10567201 × 229668251 × 269089806001<12> × 1133836730401<13> × 4710883168879506001<19> × 5519485418336288303251<22> × 19963778429046466946251<23> × 35758633131596900685051378954141001<35> × 2139731020464054092520609592459940706818275139793055476751<58> |