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?
Look and Say 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 454th fuzzylojik-golf 🇺🇸 819 88 16ms 6 May 2025 454th sean-niemann 🇺🇸 819 88 10ms 9 May 2025 454th ryyyn 🇺🇸 819 88 16ms 11 Jun 2025 454th edsrzf 🇳🇿 819 88 15ms 12 Jun 2025 454th Lv0Sys 🇵🇱 819 88 17ms 22 Jun 2025 454th xDragoxboi 819 88 16ms 30 Jun 2025 454th blaztoma 🇱🇹 819 88 16ms 1 Oct 2025 454th CornerMercury 🇬🇧 819 88 15ms 2 Oct 2025 454th Babafaba 819 88 16ms 18 Oct 2025 454th ApoChagi 819 88 16ms 18 Oct 2025 454th GolfingSuccess 🇬🇷 819 88 16ms 21 Jan 2026 454th plcc0 819 88 16ms 30 Jan 2026 454th duckyluuk 🇳🇱 819 88 16ms 4 Feb 2026 454th admp 819 88 16ms 9 Feb 2026 454th Flekay 🇩🇪 819 88 16ms 13 Feb 2026 454th snoozingnewt 🇨🇦 819 88 16ms 17 Feb 2026 454th MeWhenI 🇻🇦 819 88 20ms 12 days ago 498th MeWhenI 🇻🇦 819 101 308ms 15 Nov 2022 498th jkelly467 819 101 2,630ms 26 Jan 2026 500th Steffan153 🇫🇮 818 80 385ms 15 Aug 2024 500th CaedenHarper 🇨🇦 818 80 431ms 29 Jul 2025 500th pardouin 🇫🇷 818 80 433ms 21 Jan 2026 500th GolfingSuccess 🇬🇷 818 80 423ms 21 Jan 2026 504th KrausRaus 🇺🇸 816 71 13ms 2 May 2021 504th Garklein 🇨🇦 816 71 10ms 9 Jan 2022 506th m-tkach 🇺🇦 816 185 6ms 15 Jan 2025 507th nwellnhof 🇩🇪 814 46 32ms 4 Oct 2021 508th edsrzf 🇳🇿 813 128 367ms 28 Jan 2026 509th edsrzf 🇳🇿 813 129 206ms 1 Feb 2026 510th Shanethegamer 🇺🇸 813 1,286 3ms 7 Feb 2026 510th CaedenHarper 🇨🇦 813 1,286 2ms 5 days ago 510th dokutan 813 1,286 3ms 4 days ago 513th HumanoidCPU 813 1,287 4ms 1 Jan 2026 513th KatieLG 🇬🇧 813 1,287 2ms 21 Feb 2026 515th edsrzf 🇳🇿 811 93 106ms 9 Dec 2025 516th boxjelly 811 94 116ms 7 Jan 2021 517th stefangimmillaro 809 89 15ms 15 May 2022 517th jipsong 🇩🇪 809 89 17ms 21 Jul 2024 517th croc54 809 89 11ms 28 Nov 2024 520th fuzzylojik-golf 🇺🇸 808 81 444ms 2 Jul 2025 521st olleicua 🇺🇸 807 63 39ms 23 Mar 2024 522nd ovs-code 🇩🇪 807 69 12ms 19 Aug 2024 522nd weeble 807 69 8ms 1 Jul 2025 524th MeWhenI 🇻🇦 806 110 2ms 10 Oct 2023 525th nwellnhof 🇩🇪 805 93 1ms 20 Dec 2020 525th NewDefectus 🇮🇱 805 93 2ms 8 May 2021 527th CLOStrophobic 🇮🇹 805 123 7ms 22 Feb 2025 528th duckyluuk 🇳🇱 804 119 2ms 18 Jul 2024 528th FlyingPenguin223 804 119 2ms 18 Nov 2024 530th ovs-code 🇩🇪 803 95 14ms 30 Jun 2024 531st primo-ppcg 🇹🇭 803 103 125ms 6 Aug 2024 531st perlebach 🇨🇿 803 103 2,595ms 10 Jun 2025 533rd Yax42 🇫🇷 803 111 446ms 15 Jun 2025 534th perlebach 🇨🇿 802 45 3ms 18 Aug 2021 534th JRaspass 🇬🇧 802 45 3ms 1 Sep 2021 536th snoozingnewt 🇨🇦 802 66 100ms 19 Oct 2025 537th ovs-code 🇩🇪 802 94 114ms 18 Sep 2023 538th nullie 800 90 14ms 9 Jun 2022 538th DialFrost 🇸🇬 800 90 16ms 19 Jan 2024 538th FortuiteMan 🇫🇷 800 90 16ms 14 Jul 2025 538th jacekwladzinski 800 90 14ms 4 Oct 2025 538th TheSecondComing123 800 90 15ms 4 Feb 2026 543rd DialFrost 🇸🇬 798 82 421ms 22 Jan 2024 543rd sean-niemann 🇺🇸 798 82 442ms 2 Jul 2025 545th DialFrost 🇸🇬 797 93 6ms 5 Jan 2026 546th sisyphus-ppcg 🇦🇺 797 120 2ms 8 Apr 2022 547th jared-hughes 797 195 8ms 7 Jul 2024 548th stackofbears 796 47 32ms 25 Mar 2024 549th galloj 🇨🇿 796 62 11ms 10 Sep 2022 549th kritixilithos 796 62 12ms 27 May 2024 551st inventshah 796 94 1ms 24 Jan 2023 552nd primo-ppcg 🇹🇭 795 75 2ms 13 Nov 2022 552nd clockworknazo 795 75 4ms 14 Nov 2022 554th janAkali 🇷🇺 795 104 125ms 16 days ago 555th Marin-Kitagawa 794 64 35ms 18 Jul 2021 555th ndren 794 64 33ms 29 Aug 2023 557th elisherer 🇮🇱 793 73 11ms 2 Jan 2021 557th dylanarmstrong 793 73 11ms 22 Jan 2024 559th fourth-bit 792 91 16ms 12 Nov 2022 559th mathisfun271 792 91 16ms 13 Feb 2024 First Prev 481–560 of 2,109 Next Last