Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 463: | \[2^{463}-1\] | 11113 × 3407681 × 448747600991881<15> × 239932071009857681156251129<27> × 385606580062688087218266143<27> × 15148264043785111348665069495360623752616947973471649653354617<62> |