Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 320: | \[{8^{320}-1\over7}\] | 32 × 52 × 11 × 13 × 17 × 31 × 41 × 61 × 97 × 151 × 193 × 241 × 257 × 331 × 641 × 673 × 1321 × 23041 × 26881 × 61681 × 65537 × 414721 × 3602561 × 4855681 × 6700417 × 22253377 × 394783681 × 610548481 × 4278255361 × 4562284561<10> × 46908728641<11> × 137603804161<12> × 44479210368001<14> × 18446744069414584321<20> × 94455684953484563055991838558081<32> × 14768784307009061644318236958041601<35> × 10559241583796365631935764162530238561452234881<47> |