The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
𝑒 in all languages 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 69th Flekay 🇩🇪 979 48 17ms 13 Feb 2026 69th dokutan 979 48 15ms 14 Feb 2026 69th TheSecondComing123 979 48 16ms 23 Feb 2026 69th Joe325987 979 48 17ms 24 Feb 2026 69th aksyristos 979 48 17ms 3 hours ago 166th HPWiz 🇳🇿 975 29 7ms 29 Apr 2021 167th GrayJoKing 🇦🇺 974 32 148ms 4 Dec 2022 167th HPWiz 🇳🇿 974 32 140ms 4 Dec 2022 167th primo-ppcg 🇹🇭 974 32 155ms 5 Dec 2022 170th GrayJoKing 🇦🇺 968 39 87ms 17 Dec 2020 170th sisyphus-ppcg 🇦🇺 968 39 97ms 31 Mar 2021 170th Lydxn 🇨🇦 968 39 698ms 15 Sep 2021 170th nwellnhof 🇩🇪 968 39 72ms 27 Dec 2021 170th radarek 🇵🇱 968 39 94ms 19 May 2022 170th Steffan153 🇫🇮 968 39 694ms 7 May 2023 170th sean-niemann 🇺🇸 968 39 686ms 23 Feb 2025 170th JayXon 🇺🇸 968 39 654ms 24 Apr 2025 170th pardouin 🇫🇷 968 39 79ms 3 Sep 2025 179th HPWiz 🇳🇿 965 50 11ms 28 Jul 2018 179th ETHproductions 🇺🇸 965 50 12ms 19 Sep 2018 179th primo-ppcg 🇹🇭 965 50 12ms 29 Nov 2018 179th andersk 🇺🇸 965 50 12ms 26 Mar 2020 179th Lydxn 🇨🇦 965 50 12ms 3 Oct 2021 179th JayXon 🇺🇸 965 50 13ms 11 Oct 2021 179th nwellnhof 🇩🇪 965 50 13ms 31 Oct 2021 179th emplv 🇱🇻 965 50 15ms 26 Jan 2023 179th kcinnu 🇱🇹 965 50 12ms 6 May 2023 179th ovs-code 🇩🇪 965 50 12ms 6 May 2023 179th Steffan153 🇫🇮 965 50 15ms 7 May 2023 179th dmrichwa 🇺🇸 965 50 13ms 19 May 2023 179th rucin93 🇵🇱 965 50 11ms 18 Oct 2023 179th DialFrost 🇸🇬 965 50 13ms 18 Oct 2023 179th Argeento 🇵🇱 965 50 12ms 28 Oct 2023 179th sean-niemann 🇺🇸 965 50 13ms 1 Nov 2023 179th lukegustafson 🇺🇸 965 50 12ms 17 Nov 2023 179th trinityy-7 965 50 11ms 6 Feb 2024 179th vlpx 🇫🇮 965 50 13ms 18 Jun 2024 179th GrayJoKing 🇦🇺 965 50 12ms 13 Aug 2024 179th pardouin 🇫🇷 965 50 14ms 27 Sep 2024 179th iczelia 🇩🇪 965 50 13ms 21 Sep 2025 179th fuzzylojik-golf 🇺🇸 965 50 12ms 25 Dec 2025 179th JOrE20 965 50 14ms 27 days ago 203rd primo-ppcg 🇹🇭 960 40 286ms 12 Dec 2020 203rd nwellnhof 🇩🇪 960 40 255ms 27 Dec 2021 205th kritixilithos 958 24 39ms 16 Aug 2018 205th jslip 958 24 41ms 18 Aug 2018 205th diddily 958 24 43ms 29 Oct 2019 205th nwellnhof 🇩🇪 958 24 39ms 5 Oct 2020 205th primo-ppcg 🇹🇭 958 24 40ms 5 Oct 2020 205th GrayJoKing 🇦🇺 958 24 42ms 6 Jun 2021 205th o0lit3 🇺🇸 958 24 40ms 29 Sep 2021 205th rak1507 🇬🇧 958 24 43ms 24 Oct 2021 205th Steffan153 🇫🇮 958 24 82ms 9 May 2023 205th jipsong 🇩🇪 958 24 41ms 3 Sep 2023 205th Yewzir 🇧🇪 958 24 39ms 17 Oct 2023 205th snoozingnewt 🇨🇦 958 24 41ms 20 Sep 2025 217th kg583 🇺🇸 957 40 18ms 20 Oct 2024 217th edsrzf 🇳🇿 957 40 15ms 26 Dec 2024 217th zacjl 957 40 15ms 21 Jan 2025 217th DialFrost 🇸🇬 957 40 16ms 21 Jan 2025 217th CLOStrophobic 🇮🇹 957 40 16ms 22 Jan 2025 217th primo-ppcg 🇹🇭 957 40 16ms 16 Apr 2025 223rd Lydxn 🇨🇦 956 25 42ms 26 Jul 2022 223rd HPWiz 🇳🇿 956 25 42ms 26 Jul 2022 225th Lydxn 🇨🇦 953 27 38ms 22 May 2022 225th lynn 953 27 39ms 23 May 2022 225th primo-ppcg 🇹🇭 953 27 37ms 24 May 2022 225th JayXon 🇺🇸 953 27 38ms 24 May 2022 225th iakolzin 953 27 38ms 2 Jun 2022 225th sean-niemann 🇺🇸 953 27 40ms 3 Jun 2022 225th ovs-code 🇩🇪 953 27 38ms 20 Sep 2022 225th SirBogman 🇺🇸 953 27 38ms 30 Sep 2022 225th scpchicken 🇵🇼 953 27 39ms 16 Dec 2022 225th DialFrost 🇸🇬 953 27 40ms 24 Jan 2023 225th Steffan153 🇫🇮 953 27 38ms 11 Feb 2023 225th GrayJoKing 🇦🇺 953 27 37ms 16 Feb 2023 225th JRaspass 🇬🇧 953 27 39ms 1 Mar 2023 225th inventshah 953 27 38ms 24 Sep 2023 225th fuzzylojik-golf 🇺🇸 953 27 40ms 20 Sep 2024 225th pardouin 🇫🇷 953 27 39ms 25 Sep 2024 First Prev 161–240 of 3,471 Next Last