Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 575: | \[{4^{575}-1\over3}\] | 11 × 31 × 47 × 251 × 601 × 691 × 1151 × 1801 × 4051 × 14951 × 21851 × 178481 × 2796203 × 4036961 × 270332801 × 1567238401 × 1884103651 × 2299609001 × 13220653410551<14> × 345767385170491<15> × 2646507710984041<16> × 14807776819440781028664663654371485765148925580001<50> × 9287804280685549211923407208585104624866061082613851<52> × 180751361367036342018769695194070185090225685928190920506935609998597222187109654580729885719636966832199192789659801<117> |