The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Fractions 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 237th snoozingnewt 🇨🇦 908 72 388ms 15 days ago 242nd nstearns96 🇬🇧 908 78 18ms 23 Oct 2024 242nd souta-1326 908 78 17ms 24 Mar 2025 242nd redweasel 908 78 16ms 13 Jul 2025 245th sisyphus-ppcg 🇦🇺 907 31 124ms 30 Jan 2023 245th nwellnhof 🇩🇪 907 31 117ms 11 May 2023 247th Waffle3z 907 81 17ms 7 Sep 2021 247th JayXon 🇺🇸 907 81 16ms 8 Sep 2021 247th ihearrodmod 907 81 16ms 8 Sep 2021 247th Lydxn 🇨🇦 907 81 18ms 9 Apr 2022 251st stefangimmillaro 906 137 512ms 6 Oct 2025 252nd sisyphus-ppcg 🇦🇺 905 67 15ms 5 Sep 2021 252nd primo-ppcg 🇹🇭 905 67 17ms 9 Sep 2021 252nd xsot 🇸🇬 905 67 16ms 5 Mar 2025 255th dvargas46 🇺🇸 903 43 40ms 17 Oct 2022 255th saito-ta 🇯🇵 903 43 39ms 9 Nov 2023 257th MarcMush 🇫🇷 903 54 431ms 4 Feb 2024 257th JayXon 🇺🇸 903 54 395ms 28 Feb 2024 259th m-tkach 🇺🇦 903 120 435ms 17 Jun 2022 259th Alex-x90 🇺🇸 903 120 467ms 5 Mar 2024 259th Steffan153 🇫🇮 903 120 418ms 5 May 2024 259th sean-niemann 🇺🇸 903 120 435ms 19 Dec 2024 263rd btnlq 901 47 393ms 7 Sep 2021 263rd nwellnhof 🇩🇪 901 47 431ms 7 Sep 2021 265th Shanethegamer 🇺🇸 900 138 379ms 24 Sep 2025 265th ScottHamper 900 138 476ms 30 Nov 2025 265th MeWhenI 🇻🇦 900 138 477ms 29 Dec 2025 268th AdrienHache 🇫🇷 899 116 420ms 30 Jul 2025 269th kumavale 899 140 222ms 26 Oct 2025 269th JayXon 🇺🇸 899 140 212ms 26 Oct 2025 271st Lydxn 🇨🇦 898 109 294ms 3 Jul 2022 271st JayXon 🇺🇸 898 109 319ms 3 Jul 2022 271st nwellnhof 🇩🇪 898 109 294ms 3 Jul 2022 271st Steffan153 🇫🇮 898 109 298ms 31 Jan 2023 271st sean-niemann 🇺🇸 898 109 299ms 27 Jun 2023 271st Shanethegamer 🇺🇸 898 109 314ms 14 Jul 2023 271st kkoenig 898 109 306ms 13 Sep 2024 271st edsrzf 🇳🇿 898 109 311ms 22 Nov 2024 279th chunes3 🇺🇸 897 54 71ms 13 Sep 2023 279th ovs-code 🇩🇪 897 54 67ms 18 Sep 2023 279th Kacarott 🇦🇺 897 54 65ms 18 Sep 2023 279th GrayJoKing 🇦🇺 897 54 80ms 19 Sep 2023 279th primo-ppcg 🇹🇭 897 54 63ms 19 Sep 2023 279th sisyphus-ppcg 🇦🇺 897 54 73ms 19 Sep 2023 279th error256 897 54 62ms 17 Jun 2024 279th pardouin 🇫🇷 897 54 63ms 25 Sep 2024 279th edsrzf 🇳🇿 897 54 63ms 18 Apr 2025 288th NewDefectus 🇮🇱 896 67 22ms 4 Sep 2021 289th snyderek 🇺🇸 896 121 686ms 19 Dec 2024 290th emgordon154 895 70 1,265ms 27 Feb 2025 290th error256 895 70 1,252ms 11 Apr 2025 292nd alemelis 895 73 413ms 9 Oct 2024 293rd Frowny 894 41 33ms 8 Sep 2021 293rd HPWiz 🇳🇿 894 41 32ms 9 Sep 2021 295th edsrzf 🇳🇿 894 71 6ms 3 Apr 2025 296th m-tkach 🇺🇦 894 97 1ms 17 Jun 2022 296th Steffan153 🇫🇮 894 97 2ms 5 May 2024 296th GolfingSuccess 🇬🇷 894 97 2ms 19 Dec 2024 296th sean-niemann 🇺🇸 894 97 1ms 19 Dec 2024 300th dvargas46 🇺🇸 893 46 2ms 29 Oct 2022 300th sean-niemann 🇺🇸 893 46 2ms 30 Oct 2022 300th Lydxn 🇨🇦 893 46 2ms 30 Oct 2022 300th sisyphus-ppcg 🇦🇺 893 46 2ms 15 Nov 2022 300th Steffan153 🇫🇮 893 46 2ms 2 Mar 2023 300th DialFrost 🇸🇬 893 46 2ms 21 Dec 2024 306th zacjl 893 74 8ms 14 Dec 2024 306th edsrzf 🇳🇿 893 74 7ms 12 Feb 2025 308th DialFrost 🇸🇬 893 139 496ms 24 Sep 2025 309th lynn 891 120 141ms 4 Sep 2021 309th HPWiz 🇳🇿 891 120 141ms 4 Sep 2021 309th xnor-gate 891 120 138ms 25 Dec 2021 312th nwellnhof 🇩🇪 888 122 433ms 3 Jan 2022 312th inventshah 888 122 460ms 4 Mar 2024 312th GolfingSuccess 🇬🇷 888 122 430ms 19 Dec 2024 312th DialFrost 🇸🇬 888 122 456ms 19 Dec 2024 312th arvidjonasson 888 122 594ms 8 Jun 2025 317th FranklinJiaChen 887 19 33ms 23 Feb 2026 318th Lydxn 🇨🇦 887 88 482ms 11 Mar 2023 319th acotis 886 142 4,384ms 22 Sep 2025 320th NewDefectus 🇮🇱 885 98 2ms 3 Sep 2021 First Prev 241–320 of 2,002 Next Last