Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 539: | \[2^{539}-1\] | 23 × 89 × 127 × 4432676798593<13> × 581283643249112959<18> × 234341789260493933662402728271919<33> × 11464158678831419555307566061644085062421769697020398649986313091766942851904723145020010938191<95> |