Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 256: | \[{8^{256}-1\over7}\] | 32 × 5 × 13 × 17 × 97 × 193 × 241 × 257 × 641 × 673 × 769 × 65537 × 274177 × 6700417 × 22253377 × 67280421310721<14> × 59649589127497217<17> × 18446744069414584321<20> × 5704689200685129054721<22> × 349621839326921795694385454593<30> × 442499826945303593556473164314770689<36> × 331192380488114152600457428497953408512758882817<48> |