The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Abundant Numbers in Rust in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 1st Lydxn 🇨🇦 1,000 73 123ms 20 Oct 2023 1st JayXon 🇺🇸 1,000 73 120ms 25 Oct 2023 1st sean-niemann 🇺🇸 1,000 73 131ms 25 Jul 2024 1st kumavale 1,000 73 129ms 27 Oct 2025 1st Steffan153 🇫🇮 1,000 73 129ms 11 days ago 6th nipzu 936 78 133ms 13 Jan 2022 6th frozolotl 936 78 141ms 19 Jan 2022 6th GrayJoKing 🇦🇺 936 78 134ms 4 Apr 2022 6th andersk 🇺🇸 936 78 122ms 1 Nov 2022 6th ian-h-chamberlain 🇺🇸 936 78 125ms 21 Nov 2022 6th klixel 🇨🇦 936 78 133ms 5 Dec 2022 6th snobee 🇨🇦 936 78 133ms 10 Dec 2022 6th msbranicky 936 78 131ms 1 Oct 2023 6th ludwigschlame 🇩🇪 936 78 127ms 24 Sep 2024 6th elituf 936 78 134ms 4 Jan 2025 6th TannerJ07 🇺🇸 936 78 131ms 5 Apr 2025 6th lynn 936 78 131ms 6 Nov 2025 6th acotis 936 78 138ms 23 Feb 2026 6th roelderickx 936 78 130ms 4 days ago 20th isaacg1 924 79 140ms 3 Jan 2020 20th timvermeulen 924 79 129ms 3 Jan 2020 20th d0x2f 924 79 134ms 5 Jan 2020 20th btjones0 924 79 131ms 8 Jan 2021 20th primo-ppcg 🇹🇭 924 79 138ms 14 Jan 2022 20th stefangimmillaro 924 79 147ms 22 Aug 2023 20th stackofbears 924 79 138ms 22 Oct 2024 27th fantaize 913 80 146ms 17 days ago 28th mattiapenati 901 81 130ms 28 Nov 2020 28th Shanethegamer 🇺🇸 901 81 132ms 13 Mar 2023 28th emgordon154 901 81 120ms 19 Feb 2025 28th DialFrost 🇸🇬 901 81 136ms 5 Apr 2025 28th fuzzylojik-golf 🇺🇸 901 81 129ms 3 Sep 2025 28th pardouin 🇫🇷 901 81 124ms 19 Sep 2025 34th prplz 🇦🇺 890 82 130ms 3 Jan 2023 34th ovs-code 🇩🇪 890 82 131ms 21 Jun 2023 36th daschr 880 83 133ms 26 Sep 2022 37th Eolu 869 84 131ms 25 Jan 2022 37th verticallity 869 84 129ms 7 Apr 2022 37th Re-Adventures 🇮🇳 869 84 135ms 9 Jun 2023 37th elgan65536 🇺🇸 869 84 127ms 21 Sep 2023 37th drabart 🇵🇱 869 84 133ms 15 Dec 2023 37th Aurel300 🇨🇭 869 84 138ms 6 Jun 2024 37th wuzekai518 869 84 141ms 5 Aug 2024 37th edsrzf 🇳🇿 869 84 149ms 16 Nov 2024 37th luuumine 🇫🇷 869 84 138ms 18 Nov 2025 46th detrumi 🇳🇱 859 85 134ms 4 Jan 2020 46th scpchicken 🇵🇼 859 85 133ms 16 May 2022 46th nullie 859 85 132ms 11 Nov 2023 46th orifu 859 85 131ms 14 Oct 2024 46th itljan30 859 85 134ms 26 Jan 2025 46th snoozingnewt 🇨🇦 859 85 128ms 29 Sep 2025 52nd dyc3 849 86 135ms 4 Aug 2020 52nd boxjelly 849 86 135ms 10 Feb 2021 52nd JGDoerrer 849 86 127ms 17 Jan 2022 52nd makononov 849 86 133ms 3 Mar 2025 52nd Florian-Mt 849 86 137ms 10 Dec 2025 52nd AndreiDTU 849 86 127ms 27 Feb 2026 58th Juici 839 87 138ms 17 Sep 2020 58th StHagel 839 87 143ms 25 May 2023 58th aDwarfNamedUrist 839 87 122ms 17 Aug 2023 58th davbass 🇮🇹 839 87 130ms 3 Sep 2024 62nd zeerooth 🇵🇱 830 88 126ms 2 Feb 2021 63rd dzshn 820 89 134ms 9 Jun 2021 63rd MeWhenI 🇻🇦 820 89 145ms 1 Jun 2023 63rd okaponta 820 89 132ms 13 Jan 2024 66th Skepfyr 811 90 132ms 3 Jan 2020 66th TheSmilingTurtle 811 90 147ms 24 May 2022 68th dokutan 802 91 140ms 24 Jun 2024 69th cure-honey 🇯🇵 793 92 131ms 4 Jul 2021 69th connorslade 793 92 131ms 13 May 2022 69th jhpaques 🇫🇷 793 92 123ms 29 Jul 2022 69th Betuaredead 793 92 121ms 7 Jan 2023 69th StronkCheese 🇺🇸 793 92 133ms 14 Sep 2023 69th peeveen 🇬🇧 793 92 139ms 10 Oct 2023 75th jiaminglimjm 🇲🇾 785 93 126ms 3 Jan 2021 75th Pena86 785 93 133ms 28 May 2021 75th sreedevk 🇺🇸 785 93 138ms 4 Dec 2022 78th fia0 777 94 131ms 14 Oct 2020 78th wiebecommajonas 777 94 125ms 21 Nov 2021 78th NoUselessTech 777 94 135ms 21 Dec 2022 1–80 of 113 Next Last