Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 688: | \[{8^{688}-1\over7}\] | 32 × 5 × 13 × 17 × 97 × 173 × 241 × 257 × 431 × 673 × 1033 × 4129 × 9719 × 17029 × 46957 × 101653 × 328177 × 359137 × 500177 × 2099863 × 1591582393 × 3855260977 × 1759217765581<13> × 2932031007403<13> × 15686603697451<14> × 64082150767423457<17> × 96758771543686753<17> × 52547670996812050561<20> × 242193739165634585377<21> × 702389334730574219713<21> × 1425343275103126327372769<25> × 5951631966296685834686149<25> × 11053036065049294753459639<26> × 7277473036504760410488618498577<31> × 13298428572991424840707017555082369<35> × 3299127482423741580907799021277068588977<40> × 3662668785050561460441277306761003321502356238369<49> × 2374167881428939493047487844423127490059345018327828754454961823327959670985601<79> × 33770734168253651800370989375796994825389296318018601048482005531172856260013942500368975908606689<98> |