Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 533: | \[2^{533}-1\] | 8191 × 13367 × 166297 × 164511353 × 744487658617<12> × 12608952924551863965992360478915656490891827318068815112341761299345519816732865095518014457919111246360424125987663964268856399<128> |