Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 520: | \[{7^{520}-1\over6}\] | 25 × 53 × 11 × 41 × 53 × 131 × 157 × 191 × 281 × 313 × 521 × 1201 × 2801 × 4021 × 157951 × 787021 × 1175071 × 85094881 × 134358901 × 228511817 × 16148168401<11> × 810221830361<12> × 4446437759531<13> × 434502978835771<15> × 1195857367853217109<19> × 1739517065396641961<19> × 244465891693615564961<21> × 1377454635342537460935008154217<31> × 35695043869049049222174543845808031<35> × 10231029132426951826057727673749330815378228332102667845417423429495639901<74> × 8194450470170560139147969727837908582134721929585807123362515087753877000147877666144717854586915891652087516747700603761<121> |