Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 516: | \[{19^{516}-1\over18}\] | 23 × 3 × 5 × 73 × 132 × 127 × 173 × 181 × 769 × 1033 × 1291 × 2753 × 308569 × 45597803 × 893784191660089<15> × 967598144192139259<18> × 5947171668279705271<19> × 55578787747850091391<20> × 101557564126249673041<21> × 69456939989229889776307<23> × 18917672548149688895557513<26> × 28461948730641665973894996037<29> × 256994201748988109159424257077<30> × 36345637656251647357558267023272022549061<41> × 468595144970360886882426006974314247363057492161789<51> × 5086345414649205177826740885686300803862976717463015661252167<61> × 5836220386603742180418371025474429702397876356803454298565651051802129234041<76> × 246162195884230986571490187597420333102560556431877821312143180613033841811545705740136284897663747902301309211041773268022465679776406458049264050892404975123715997518173114232047184569855031681<195> |