Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 999: | \[2^{999}-1\] | 7 × 73 × 223 × 1999 × 7993 × 10657 × 169831 × 262657 × 321679 × 1238761 × 26295457 × 36085879 × 199381087 × 319020217 × 473589937 × 616318177 × 698962539799<12> × 4096460559560875111<19> × 610750585993378533918571366551132613003293697<45> × 504210588367141337242618878475927423280316140971751701077127890485673968877718991187197029450161772747335442226187851047716605340725373913<138> |