Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 240: | \[{8^{240}-1\over7}\] | 33 × 52 × 11 × 13 × 17 × 19 × 31 × 37 × 41 × 61 × 73 × 97 × 109 × 151 × 181 × 241 × 257 × 331 × 433 × 577 × 631 × 673 × 1321 × 23311 × 38737 × 54001 × 61681 × 8369281 × 18837001 × 29247661 × 394783681 × 4278255361 × 4562284561<10> × 46908728641<11> × 168692292721<12> × 487824887233<12> × 469775495062434961<18> × 750016890283777055704738227247474485366338380663681<51> |