Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 257: | \[{16^{257}-1\over15}\] | 28564009 × 360197837 × 22988734297<11> × 37239639534523<14> × 535006138814359<15> × 518144156602508243009<21> × 1155685395246619182673033<25> × 374550598501810936581776630096313181393<39> × 4000659204579114753312310878847043394855313<43> × 4501721456014165137144897707223043167472851489652285029320729<61> × 10073811610622418028425741738319757818107396980605471702450570926313<68> |