Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 320: | \[{23^{320}-1\over22}\] | 28 × 3 × 52 × 17 × 31 × 41 × 53 × 61 × 193 × 211 × 241 × 257 × 941 × 3697 × 5081 × 54401 × 139921 × 272341 × 292561 × 623009 × 7249841 × 22143600481<11> × 147190628299441<15> × 1206964869343609001<19> × 15887591750468908417<20> × 146239626404410677041<21> × 265050271150614503512961<24> × 12282446128492863805157611507841<32> × 73169086596340605135996253341472193203073<41> × 1160079805734549349839972977742961656157450241<46> × 1174157576758064711133567927542424489257843862740625086853780539456254241<73> × 529739091776148264581140799660683419552676213104935393444854730665100531201<75> |