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 710th vgamula 🇺🇦 720 100 11ms 9 Feb 2026 710th solisolu 720 100 15ms 16 Feb 2026 723rd SirBogman 🇺🇸 718 39 42ms 12 Sep 2022 724th stefangimmillaro 717 148 42ms 10 Feb 2026 725th JRaspass 🇬🇧 715 49 145ms 4 Dec 2020 726th jakzo 715 81 10ms 5 Sep 2021 727th ehulinsky 🇺🇸 713 101 11ms 10 Nov 2021 727th commandz0 🇺🇸 713 101 15ms 17 Nov 2023 727th hellwue 713 101 11ms 21 Jun 2024 727th hiichbindermax 713 101 11ms 21 Jun 2024 727th souta-1326 713 101 16ms 1 Apr 2025 732nd HallMatthew314 712 107 120ms 18 Jan 2022 732nd JoaoFelipe3 712 107 118ms 14 Jan 2024 734th MeWhenI 🇻🇦 711 92 444ms 24 May 2024 735th albanian-laundromat 708 114 72ms 15 Nov 2025 736th pzagrebin 706 47 49ms 7 Jul 2022 737th stefangabos 🇷🇴 706 82 13ms 7 Jun 2023 737th sebipopa 🇷🇴 706 82 11ms 8 Jun 2023 737th junkondo-jp 706 82 11ms 28 May 2024 740th AkashTandon167 706 102 11ms 2 Dec 2020 740th abba23 706 102 10ms 13 Jun 2021 740th olavaga 706 102 10ms 15 Aug 2021 740th Anonymousellama21 706 102 15ms 15 Jun 2022 740th Mikey-Beep 🇬🇧 706 102 11ms 17 Jun 2022 740th bob-th 706 102 11ms 6 Aug 2022 740th grave367 706 102 11ms 5 Mar 2023 740th msbranicky 706 102 10ms 10 Aug 2023 740th m42km 706 102 15ms 25 Nov 2023 740th eddvrs 706 102 11ms 22 Dec 2023 740th sultan 706 102 11ms 5 Mar 2024 740th Languag3 706 102 10ms 9 Oct 2024 740th KasperKivimaeki 🇫🇮 706 102 10ms 10 Jul 2025 740th LostSyntax21 🇬🇧 706 102 15ms 6 Jan 2026 754th KasperKivimaeki 🇫🇮 706 106 2ms 10 Nov 2025 755th olivermrose 🇺🇸 706 108 138ms 31 Aug 2021 756th Yewzir 🇧🇪 706 135 112ms 28 Mar 2024 757th Yewzir 🇧🇪 705 107 74ms 9 Mar 2024 758th stefangimmillaro 704 170 291ms 11 Oct 2023 759th Shanethegamer 🇺🇸 703 162 43ms 10 Sep 2024 760th MeWhenI 🇻🇦 702 72 147ms 3 Aug 2024 761st namelessiw 702 127 388ms 13 Nov 2024 762nd Ripick 701 118 120ms 24 Jun 2024 762nd dokutan 701 118 2,719ms 25 Sep 2025 762nd RobertHoeh 701 118 2,566ms 28 Sep 2025 765th NewDefectus 🇮🇱 699 103 13ms 18 Dec 2020 765th Indivicivet 699 103 11ms 16 Mar 2021 765th rowechenzhong 699 103 11ms 27 Nov 2021 765th CedricGebistorf 699 103 10ms 6 Mar 2022 765th trist224 🇫🇷 699 103 11ms 1 Sep 2022 765th betaveros 699 103 10ms 31 Dec 2022 765th klixel 🇨🇦 699 103 11ms 28 Mar 2025 765th Matter1024 🇮🇳 699 103 10ms 2 Jul 2025 765th redweasel 699 103 10ms 24 Jul 2025 765th RaBa21 🇭🇺 699 103 11ms 1 Aug 2025 775th unfinishedprogram 698 83 10ms 15 Jul 2024 776th marcin7Cd 697 142 19ms 8 Feb 2021 777th DialFrost 🇸🇬 696 122 724ms 10 Jul 2024 778th GolfingSuccess 🇬🇷 695 71 11ms 1 Jun 2022 779th dokutan 695 137 109ms 26 Sep 2025 780th jipsong 🇩🇪 694 52 3ms 11 Jun 2024 780th Solathian 694 52 3ms 13 days ago 782nd ArmaanAS 693 104 15ms 26 Mar 2021 782nd neihousaigaai 693 104 11ms 28 Mar 2021 782nd Eilonlif 🇮🇱 693 104 11ms 11 Sep 2022 782nd fbe 693 104 11ms 18 Oct 2023 782nd jatloe 693 104 12ms 9 Sep 2024 787th Irratix 🇳🇱 693 110 115ms 14 Dec 2021 788th xsot 🇸🇬 691 48 54ms 21 Jul 2024 789th primo-ppcg 🇹🇭 691 129 415ms 21 Nov 2021 790th emgordon154 691 218 1,676ms 15 Jan 2026 791st ovs-code 🇩🇪 690 138 119ms 27 Sep 2024 792nd stefangimmillaro 690 170 126ms 4 Jun 2025 793rd yomansour 690 196 26ms 30 Jul 2021 794th xyangst 689 84 10ms 7 Oct 2024 795th LucaArgentiUCF 🇮🇹 689 154 40ms 28 Jan 2021 796th bastienvoirin 🇫🇷 686 105 15ms 5 Dec 2020 796th RYNO8 686 105 10ms 27 Aug 2021 796th ejini6969 686 105 12ms 1 Apr 2023 796th stertooy 🇧🇪 686 105 10ms 14 Jun 2024 796th bnic24 686 105 10ms 31 Jul 2024 First Prev 721–800 of 2,109 Next Last