The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 27 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 561st coreynash 613 118 12ms 19 Feb 2024 562nd marcin7Cd 612 170 114ms 8 Feb 2021 563rd lionbryce 612 172 4ms 8 Aug 2024 564th logvp 611 112 130ms 8 Jan 2024 564th Bmrl7 611 112 13ms 21 Feb 2024 564th RYNO8 611 112 18ms 14 Jun 2024 564th Pyroan 611 112 11ms 12 Mar 2025 564th YAJUE114514 611 112 11ms 19 Dec 2025 569th abailey2020 🇺🇸 610 241 7ms 18 Apr 2020 570th MarcMush 🇫🇷 608 103 1,057ms 7 Jan 2024 571st PatrickStephansen 🇿🇦 608 119 12ms 8 Mar 2021 571st MeWhenI 🇻🇦 608 119 11ms 25 Nov 2022 573rd anter69 🇭🇺 607 94 43ms 5 Mar 2022 574th Exaphis 606 113 12ms 11 Jul 2022 574th commandz0 🇺🇸 606 113 11ms 1 Oct 2022 576th MeWhenI 🇻🇦 606 134 81ms 12 Dec 2022 577th SirBogman 🇺🇸 605 365 18ms 23 Nov 2022 578th duckyluuk 🇳🇱 602 109 473ms 26 Mar 2024 579th marcin7Cd 602 134 139ms 7 Oct 2020 580th proton 🇩🇪 601 95 44ms 10 Jun 2020 580th razetime 601 95 40ms 25 Jan 2021 580th olivermrose 🇺🇸 601 95 41ms 24 Oct 2021 580th scpchicken 🇵🇼 601 95 42ms 22 Apr 2023 584th neihousaigaai 601 114 11ms 18 May 2021 584th FlorianCassayre 🇫🇷 601 114 24ms 17 Oct 2023 584th Artemis21 🇬🇧 601 114 21ms 10 Jan 2025 587th MeWhenI 🇻🇦 601 123 150ms 3 Aug 2024 588th tsunderu 🇯🇵 601 133 6ms 25 Aug 2021 588th Mandrzejy 🇵🇱 601 133 6ms 27 Feb 2024 590th Shanethegamer 🇺🇸 600 65 6ms 6 Feb 2022 591st retrohun 600 123 5ms 12 Nov 2022 592nd MateuszPietrzak 🇵🇱 600 162 444ms 11 Jan 2024 593rd Shanethegamer 🇺🇸 600 164 137ms 27 Feb 2023 593rd klixel 🇨🇦 600 164 132ms 10 May 2023 595th Shanethegamer 🇺🇸 598 99 1,307ms 27 Feb 2023 596th omurakazuaki 🇯🇵 598 121 11ms 15 Mar 2021 596th alexsave 598 121 10ms 4 Nov 2025 598th iznax 596 136 354ms 21 Nov 2021 599th Shanethegamer 🇺🇸 595 96 51ms 27 Feb 2023 600th galloj 🇨🇿 595 115 11ms 24 Jan 2021 600th myleopard 595 115 18ms 15 Oct 2021 600th CedricGebistorf 595 115 10ms 19 Feb 2022 600th betaveros 595 115 13ms 1 Jan 2023 600th scpchicken 🇵🇼 595 115 12ms 28 Feb 2023 600th janbehrens 🇩🇪 595 115 17ms 17 Jun 2023 600th fourth-bit 595 115 20ms 11 Nov 2024 607th Indivicivet 593 135 6ms 16 Mar 2021 608th anter69 🇭🇺 592 100 1,290ms 24 Feb 2023 609th commandz0 🇺🇸 592 111 542ms 1 Sep 2025 610th UnderKoen 🇳🇱 591 273 35ms 20 Jan 2025 611th vezzick 590 116 16ms 8 Mar 2021 611th Shanethegamer 🇺🇸 590 116 18ms 24 Sep 2021 611th amollberg 🇸🇪 590 116 10ms 18 Jan 2022 611th hiichbindermax 590 116 11ms 17 Sep 2024 615th KevinMarquette 🇺🇸 588 110 312ms 5 Jun 2020 616th MeWhenI 🇻🇦 588 181 4ms 24 Jul 2023 617th giacomogallina 585 117 23ms 14 Jun 2019 617th cellobix 585 117 18ms 15 Aug 2019 617th dzhang314 585 117 17ms 15 Aug 2019 617th mathisfun271 585 117 12ms 16 Dec 2023 617th KasperKivimaeki 🇫🇮 585 117 14ms 7 Jul 2025 622nd MeWhenI 🇻🇦 584 212 106ms 7 Jun 2023 623rd Shanethegamer 🇺🇸 584 225 25ms 25 Mar 2022 624th primo-ppcg 🇹🇭 583 189 436ms 14 Jul 2020 625th denkyuu1 582 98 45ms 24 days ago 626th TimCurwick 🇺🇸 582 111 268ms 30 Jul 2020 627th MeWhenI 🇻🇦 582 158 42ms 2 Jun 2024 628th stertooy 🇧🇪 580 118 12ms 19 Jun 2024 628th EnTerr 580 118 15ms 1 Sep 2024 630th SirBogman 🇺🇸 580 139 181ms 27 Nov 2021 631st janbehrens 🇩🇪 580 190 460ms 15 Nov 2022 632nd RockOfStone 579 182 3ms 10 Mar 2024 633rd MeWhenI 🇻🇦 577 128 11ms 3 Jul 2023 634th Shanethegamer 🇺🇸 576 114 546ms 18 Jan 2024 635th ian-h-chamberlain 🇺🇸 576 171 128ms 8 Oct 2020 636th TheAristos 575 119 10ms 23 Oct 2019 637th cmayer777 575 169 60ms 21 Oct 2022 638th edsrzf 🇳🇿 574 178 1,343ms 29 Apr 2025 639th Alex-x90 🇺🇸 574 224 288ms 19 Sep 2024 640th iczelia 🇩🇪 572 141 141ms 19 Oct 2025 First Prev 561–640 of 1,671 Next Last