Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 533: | \[{4^{533}-1\over3}\] | 83 × 2731 × 8191 × 13367 × 166297 × 354979 × 164511353 × 8831418697<10> × 744487658617<12> × 111719734852571<15> × 118060225551350870763652733874186880099078420518378697082407356114986221754712225603525595135699916930897666025083343294677939<126> × 12608952924551863965992360478915656490891827318068815112341761299345519816732865095518014457919111246360424125987663964268856399<128> |