The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 25 hours. 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 881st msbranicky 449 181 115ms 17 Aug 2023 882nd JGDoerrer 449 219 155ms 18 Jan 2022 883rd h3ra993huskp 🇯🇵 449 245 490ms 30 Nov 2025 884th ehulinsky 🇺🇸 448 153 396ms 10 Nov 2021 884th mokymok 🇺🇸 448 153 17ms 15 Nov 2021 886th keelimeguy 🇺🇸 446 288 299ms 2 Jun 2025 887th Natanaelel 🇸🇪 444 180 6ms 14 May 2023 888th Attero 🇸🇪 443 183 409ms 21 Nov 2021 889th hjcafaroUC 442 155 10ms 1 Aug 2020 889th AkashTandon167 442 155 247ms 20 Jan 2021 891st roguh 🇬🇹 442 181 6ms 8 Jan 2024 892nd eranws 441 164 10ms 17 Oct 2022 893rd rucin93 🇵🇱 440 250 425ms 28 Nov 2023 894th orthoplex 🇨🇽 440 367 25ms 9 Jun 2024 895th Stockoh 🇫🇷 439 156 33ms 31 Oct 2024 895th jameswmccarty 439 156 18ms 6 Mar 2025 897th dokutan 438 141 1,581ms 30 Aug 2025 898th msbranicky 437 231 143ms 1 Jan 2024 899th aDwarfNamedUrist 437 241 3ms 6 Dec 2022 900th aalec 436 157 11ms 4 May 2024 901st two-bad 🇬🇧 436 166 10ms 25 Feb 2024 902nd lacroixjonathan87 435 170 5ms 6 Sep 2020 903rd keelimeguy 🇺🇸 433 158 16ms 7 Nov 2023 903rd wobblybits 433 158 48ms 16 Aug 2025 905th zakariamouhid 433 167 20ms 14 Jun 2023 906th hamhub7 433 187 417ms 17 Aug 2022 907th cafehaine 🇫🇷 433 243 3ms 5 Feb 2020 908th za3k 431 159 10ms 10 Oct 2022 908th KadinSchultz 431 159 18ms 4 days ago 910th mintypython 431 168 10ms 21 Sep 2019 910th AnnoyedArt1256 431 168 11ms 9 Jan 2022 910th madeforlosers 431 168 11ms 3 Nov 2025 913th dokutan 431 234 150ms 22 Dec 2024 914th n1LS 429 133 42ms 27 Sep 2019 915th trist224 🇫🇷 428 160 11ms 15 Sep 2022 916th MossGrass 🇺🇸 427 258 436ms 16 Oct 2020 917th MeWhenI 🇻🇦 426 213 447ms 10 Feb 2025 918th mothcolada 🇺🇸 425 161 12ms 15 Dec 2020 918th Andrey135296 425 161 20ms 24 Oct 2022 918th Andrey2001 425 161 13ms 6 days ago 921st laserb 421 149 376ms 26 Jan 2020 922nd befoster 420 163 11ms 8 May 2021 922nd LeeCamp 420 163 27ms 10 Dec 2021 924th RandGuy 420 193 392ms 31 Mar 2022 925th Kusarr 420 262 425ms 17 Dec 2020 926th pyrolitic 🇮🇪 419 191 6ms 4 Apr 2022 927th msbranicky 419 218 2,622ms 9 Jan 2025 928th jiaminglimjm 🇲🇾 418 164 12ms 9 Jan 2021 928th islptng 418 164 21ms 30 Aug 2025 928th AidanWalter 418 164 19ms 27 Nov 2025 931st dsntzn 🇸🇰 418 173 10ms 2 Mar 2021 932nd aksyristos 415 165 15ms 20 Jan 2023 932nd dokutan 415 165 28ms 9 Jul 2024 932nd RaBa21 🇭🇺 415 165 14ms 19 Jul 2025 935th c0d3-4-F00d 🇩🇪 415 193 6ms 21 Jan 2022 936th connorslade 412 239 165ms 13 May 2022 937th Reyzartz 408 168 13ms 19 Sep 2020 937th Pena86 408 168 19ms 4 Jan 2022 939th dokutan 408 181 137ms 23 Apr 2025 940th galloj 🇨🇿 407 134 13ms 17 Jan 2023 941st aliakseikalosha 407 199 407ms 18 Jul 2025 942nd RandGuy 405 169 26ms 4 May 2022 942nd TaserTheFox 🇺🇸 405 169 18ms 1 May 2023 944th jjatria 403 144 180ms 11 Jul 2020 944th scpchicken 🇵🇼 403 144 261ms 29 Mar 2022 946th croc54 403 170 11ms 16 Dec 2024 947th alphafalfa 403 183 9ms 1 Aug 2025 948th mikehanus 402 199 6ms 21 Nov 2023 949th dokutan 400 164 604ms 9 Jul 2024 950th bobbysq 400 171 12ms 16 Nov 2023 951st kellantech 398 172 31ms 31 May 2023 952nd janbehrens 🇩🇪 397 133 5ms 14 May 2021 953rd snoozingnewt 🇨🇦 397 182 10ms 11 Oct 2025 954th postie77 397 204 389ms 14 Jun 2023 955th brimstonetrader 396 173 15ms 19 Dec 2023 956th WillowWispy 394 174 13ms 23 Mar 2025 957th Pimentero 🇷🇺 393 188 6ms 17 Apr 2024 958th rjmholt 392 165 313ms 3 Jun 2020 959th ianpoe 391 175 11ms 30 Apr 2020 960th KatieLG 🇬🇧 391 185 10ms 11 Jun 2024 First Prev 881–960 of 1,671 Next Last