Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 707: | \[2^{707}-1\] | 127 × 126729751 × 128782811543<12> × 7432339208719<13> × 341117531003194129<18> × 700553271665826444242790841<27> × 3598194408030741269333601460682311<34> × 51903872795463977962670556595700473584389435543<47> × 979290663259342511569398738931332381010645147626228199<54> |