Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 817: | \[2^{817}-1\] | 431 × 9719 × 524287 × 2099863 × 81278478804329<14> × 1527890378338261467896809<25> × 503836749763922905688176944079261201<36> × 7911922734932819371233930194607936241219971448463<49> × 382831718326935861811415368870561185774664678161354690184167928439626823220605569739325421350440972002033<105> |