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?
Abundant Numbers (Long) 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 796th aydamak 879 47 55ms 17 May 2024 796th emgordon154 879 47 54ms 13 Jun 2024 796th error256 879 47 100ms 3 Jul 2024 796th TFeld00 🇩🇰 879 47 62ms 3 Sep 2024 796th tatzyr 🇯🇵 879 47 54ms 23 Oct 2024 796th Babafaba 879 47 54ms 15 Oct 2025 796th Matter1024 🇮🇳 879 47 53ms 14 Nov 2025 796th Just4FunCoder 879 47 57ms 15 hours ago 809th Shanethegamer 🇺🇸 879 74 7ms 20 Dec 2024 810th jared-hughes 877 68 40ms 19 Nov 2022 810th MaxElf999 877 68 30ms 21 Nov 2022 810th LeeCamp 877 68 30ms 15 Jan 2023 810th ejini6969 877 68 71ms 1 Apr 2023 810th rschwa6308 🇺🇸 877 68 30ms 5 May 2023 810th ehulinsky 🇺🇸 877 68 21ms 7 May 2023 810th ZoeyKD 877 68 29ms 13 May 2023 810th yzhs 🇩🇪 877 68 30ms 21 Jun 2023 810th adamnielson42 🇺🇸 877 68 29ms 14 Aug 2023 810th mikehanus 877 68 39ms 5 Dec 2023 810th shelerr 877 68 30ms 10 Jan 2024 810th jtaxen 877 68 21ms 31 Mar 2024 810th FranklinJiaChen 877 68 38ms 13 Jun 2024 810th codingisgreatbutiamnot 877 68 38ms 25 Jul 2024 810th alemelis 877 68 31ms 29 Aug 2024 810th moustave 877 68 31ms 14 Nov 2024 810th croc54 877 68 31ms 23 Dec 2024 810th Kyogre-Primal 🇺🇦 877 68 30ms 27 May 2025 810th smilesformiles3 877 68 30ms 11 Jun 2025 810th dirckvdende 877 68 30ms 5 Jul 2025 810th FortuiteMan 🇫🇷 877 68 31ms 9 Jul 2025 810th wuduculfre 877 68 31ms 28 Jul 2025 810th Matter1024 🇮🇳 877 68 31ms 12 Aug 2025 810th tommasotode 877 68 29ms 19 Sep 2025 810th Trildcookie 877 68 72ms 23 Dec 2025 810th nemoyatpeace 877 68 29ms 29 Dec 2025 810th TheSecondComing123 877 68 28ms 25 Feb 2026 810th kitotch 877 68 30ms 9 days ago 838th stefangimmillaro 877 77 126ms 4 Dec 2022 838th Re-Adventures 🇮🇳 877 77 119ms 8 Dec 2023 838th snoozingnewt 🇨🇦 877 77 122ms 9 Oct 2025 841st zacjl 877 88 42ms 14 Feb 2025 842nd primo-ppcg 🇹🇭 876 41 146ms 20 Nov 2022 843rd MeWhenI 🇻🇦 876 63 15ms 9 Oct 2023 843rd GolfingSuccess 🇬🇷 876 63 15ms 14 Oct 2023 845th Steffan153 🇫🇮 876 70 676ms 22 Nov 2022 845th GrayJoKing 🇦🇺 876 70 1,238ms 12 Dec 2022 845th Shanethegamer 🇺🇸 876 70 629ms 18 Feb 2023 845th jipsong 🇩🇪 876 70 669ms 1 Sep 2023 849th JDiLenarda 🇫🇷 876 75 1,272ms 15 Dec 2023 850th KrausRaus 🇺🇸 875 87 369ms 2 Dec 2022 850th TRexOnGit 875 87 364ms 16 Jan 2024 850th amazingalek 🇳🇴 875 87 412ms 21 Jan 2026 853rd DialFrost 🇸🇬 875 147 1,622ms 18 Jan 2026 854th primo-ppcg 🇹🇭 875 195 1,428ms 13 Aug 2025 855th orthoplex 🇨🇽 874 102 261ms 29 Jun 2023 855th Steffan153 🇫🇮 874 102 249ms 20 Jul 2024 857th canissimia 🇦🇶 874 131 2,150ms 31 Oct 2023 858th adaGrad1 873 70 2ms 3 Sep 2023 858th ListeriaM 873 70 2ms 13 Jan 2026 858th solisolu 873 70 3ms 12 days ago 861st primo-ppcg 🇹🇭 873 92 56ms 20 Nov 2022 861st Steffan153 🇫🇮 873 92 62ms 2 Dec 2022 861st sean-niemann 🇺🇸 873 92 71ms 5 Feb 2025 861st DialFrost 🇸🇬 873 92 64ms 9 Dec 2025 861st roelderickx 873 92 388ms 2 days ago 861st bitsandbeyond 🇳🇱 873 92 385ms 2 days ago 867th janbehrens 🇩🇪 873 115 295ms 19 Nov 2022 867th msbranicky 873 115 298ms 21 Aug 2023 867th harshit54 873 115 297ms 6 Oct 2023 867th arctouch-cristiannevianna 873 115 299ms 25 Mar 2024 867th rifatx 873 115 294ms 22 Jul 2024 867th ibeucaly 873 115 290ms 6 Sep 2024 873rd Feniske 🇫🇷 872 49 2,081ms 21 Nov 2022 873rd 5quiwyrm 872 49 1,952ms 12 Dec 2024 873rd DialFrost 🇸🇬 872 49 2,621ms 26 Aug 2025 876th ashtraypettingzoo 🇺🇸 872 66 152ms 11 Feb 2023 877th Betuaredead 872 74 136ms 7 Jan 2023 877th dokutan 872 74 139ms 8 Jun 2024 877th snoozingnewt 🇨🇦 872 74 146ms 9 Oct 2025 880th ridingqwerty 🇺🇸 871 64 482ms 25 Jul 2025 First Prev 801–880 of 2,764 Next Last
