Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 605: | \[{4^{605}-1\over3}\] | 113 × 23 × 31 × 89 × 683 × 727 × 881 × 2971 × 3191 × 3631 × 117371 × 201961 × 48912491 × 143448045841<12> × 11054184582797800455736061107<29> × 715726621375769988310557612811<30> × 1786393878363164227858270210279<31> × 360803084812996454792157750493600042763764231072068795228648897917296768813403901316256813373475420361<102> × 5448351236315742026827470749290138552538510376598571254569437566703575251869691806410089694456327608528590739813981151<118> |