The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Rule 110 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 320th snoozingnewt 🇨🇦 806 85 13ms 13 days ago 322nd NewDefectus 🇮🇱 804 71 41ms 18 Nov 2021 323rd emgordon154 803 201 47ms 10 Jun 2025 324th ovs-code 🇩🇪 802 109 70ms 20 Sep 2023 325th JohandeRuiter 🇳🇱 800 100 7ms 27 Oct 2023 326th The3gs 800 123 128ms 28 Nov 2024 327th kg583 🇺🇸 800 130 77ms 30 Apr 2025 328th primo-ppcg 🇹🇭 800 140 129ms 17 Oct 2020 329th Shanethegamer 🇺🇸 798 132 3ms 29 Jan 2025 330th KasperKivimaeki 🇫🇮 798 161 273ms 8 Oct 2025 331st Steffan153 🇫🇮 797 119 106ms 25 Jun 2024 332nd KenanSi 796 49 4ms 23 Feb 2022 333rd NewDefectus 🇮🇱 796 86 11ms 18 Nov 2021 333rd GolfingSuccess 🇬🇷 796 86 13ms 30 Jan 2025 335th emplv 🇱🇻 795 91 12ms 20 Jul 2022 336th lynn 794 156 28ms 21 Jul 2023 337th jared-hughes 793 72 41ms 10 Sep 2022 338th emgordon154 793 153 17ms 15 Dec 2024 339th jared-hughes 792 133 2ms 21 Jul 2022 340th nwellnhof 🇩🇪 792 139 426ms 18 Jan 2026 341st prplz 🇦🇺 790 123 67ms 4 Jan 2022 342nd AlephSquirrel 788 132 23ms 6 Oct 2024 343rd retrohun 787 87 28ms 18 Jul 2018 343rd SirBogman 🇺🇸 787 87 11ms 28 Nov 2022 343rd Natanaelel 🇸🇪 787 87 11ms 6 Aug 2023 346th Attero 🇸🇪 784 102 6ms 10 Jun 2020 347th 4hg 🇺🇸 783 52 34ms 3 Aug 2023 348th antimon2 🇯🇵 783 80 701ms 29 Oct 2022 349th tailorspy 783 124 402ms 20 Sep 2024 350th Shanethegamer 🇺🇸 782 140 43ms 14 Jun 2022 351st elgan65536 🇺🇸 781 126 243ms 7 Feb 2026 352nd Attero 🇸🇪 780 135 4ms 5 Apr 2020 353rd sean-niemann 🇺🇸 779 165 304ms 6 May 2024 354th jacklynnepenick 778 88 198ms 26 Aug 2021 354th Command-Master 778 88 14ms 29 Sep 2023 356th Command-Master 777 125 441ms 29 Sep 2023 357th albanian-laundromat 775 122 76ms 28 Aug 2025 358th SirBogman 🇺🇸 773 85 506ms 20 Jan 2024 358th snoozingnewt 🇨🇦 773 85 392ms 13 days ago 360th SirBogman 🇺🇸 773 119 40ms 2 Nov 2022 361st Irratix 🇳🇱 771 74 37ms 21 Apr 2022 361st MeWhenI 🇻🇦 771 74 41ms 26 May 2023 363rd CatsAreFluffy 771 78 51ms 6 Jan 2023 364th edsrzf 🇳🇿 770 167 283ms 22 Feb 2026 365th jared-hughes 769 89 16ms 17 Feb 2022 366th igmcdowell 769 94 15ms 20 Dec 2021 366th vlpx 🇫🇮 769 94 10ms 23 Sep 2024 368th sean-niemann 🇺🇸 769 128 186ms 8 Jun 2025 369th Alex-x90 🇺🇸 769 137 3ms 11 Feb 2023 370th sean-niemann 🇺🇸 765 144 478ms 26 Sep 2025 371st andersk 🇺🇸 763 129 126ms 6 Jan 2020 372nd TobyBoyne 🇬🇧 761 90 13ms 7 Apr 2022 373rd DialFrost 🇸🇬 759 107 108ms 5 Jul 2025 374th m-tkach 🇺🇦 759 128 67ms 15 Dec 2022 375th itsh01 753 96 11ms 6 Sep 2022 375th DialFrost 🇸🇬 753 96 11ms 23 Jan 2024 375th trinityy-7 753 96 12ms 21 Mar 2024 378th primo-ppcg 🇹🇭 753 143 113ms 23 Jan 2020 379th Irratix 🇳🇱 752 91 15ms 9 Dec 2022 379th prplz 🇦🇺 752 91 174ms 29 Jan 2023 379th cykim8811 752 91 15ms 11 Jul 2024 382nd edsrzf 🇳🇿 752 140 4ms 16 Feb 2025 383rd MichalMarsalek 🇨🇿 752 149 342ms 16 Feb 2022 384th blaztoma 🇱🇹 749 152 110ms 4 Dec 2025 385th sean-niemann 🇺🇸 747 130 66ms 28 Dec 2023 386th didion0 🇺🇸 746 97 12ms 18 Apr 2022 386th emgordon154 746 97 10ms 3 Aug 2025 388th timvermeulen 746 132 130ms 7 Jan 2020 389th moustave 744 92 10ms 4 Jun 2025 389th InigoK 🇺🇸 744 92 16ms 22 Aug 2025 391st Waffle3z 742 142 4ms 18 Oct 2020 392nd m-tkach 🇺🇦 742 167 25ms 5 May 2025 393rd MeWhenI 🇻🇦 740 80 1,371ms 25 Oct 2022 394th Alex-x90 🇺🇸 739 148 44ms 28 Apr 2024 395th weliveinhell 🇭🇹 738 98 11ms 2 Sep 2023 396th snoozingnewt 🇨🇦 738 146 115ms 19 Nov 2025 397th Yax42 🇫🇷 737 110 414ms 10 Sep 2025 398th glesnick 736 93 15ms 15 Jul 2022 398th MeWhenI 🇻🇦 736 93 11ms 26 Jul 2025 400th cure-honey 🇯🇵 736 125 41ms 1 Jul 2021 First Prev 321–400 of 1,670 Next Last