Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 320: | \[{18^{320}-1\over17}\] | 53 × 11 × 13 × 19 × 41 × 97 × 113 × 641 × 881 × 929 × 2711 × 9041 × 15101 × 145501 × 254209 × 449921 × 475777 × 113607841 × 3930785153 × 17619087361<11> × 30894471809<11> × 1434683436161<13> × 545145333573761<15> × 58247889674277761<17> × 137841514501966721<18> × 121934274199167596917341199489<30> × 13349280905191088232004843517040641<35> × 23007113434668367286031526391280991361<38> × 2969659448067234231522118920873449494243811201<46> × 31735371658383830274413003852048583870143998721<47> × 22643555386444271630665200524987272707468676718600644481<56> |