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?
Abundant Numbers 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 480th Shanethegamer 🇺🇸 868 44 1,286ms 10 Feb 2022 480th MeWhenI 🇻🇦 868 44 1,235ms 12 Aug 2022 480th error256 868 44 1,195ms 29 Jul 2024 480th emgordon154 868 44 1,283ms 12 Nov 2024 485th Irratix 🇳🇱 868 54 12ms 26 Jul 2020 485th Argeento 🇵🇱 868 54 11ms 11 Oct 2020 485th Attero 🇸🇪 868 54 10ms 20 Oct 2020 485th o0lit3 🇺🇸 868 54 11ms 21 Jan 2021 485th GrayJoKing 🇦🇺 868 54 12ms 5 Jun 2021 485th inventshah 868 54 11ms 17 Jun 2022 485th dmrichwa 🇺🇸 868 54 9ms 4 Dec 2022 485th DialFrost 🇸🇬 868 54 14ms 8 Feb 2023 485th Maznek 868 54 10ms 6 Jul 2023 485th voytxt 🇨🇿 868 54 10ms 14 Jul 2023 485th MeWhenI 🇻🇦 868 54 12ms 21 Aug 2023 485th itserasmus 868 54 11ms 25 Jan 2024 485th fuzzylojik-golf 🇺🇸 868 54 11ms 29 May 2025 485th acollett89 868 54 10ms 21 Jul 2025 485th Yax42 🇫🇷 868 54 10ms 20 Jan 2026 500th clockworknazo 868 57 3ms 15 Nov 2022 500th sean-niemann 🇺🇸 868 57 2ms 3 days ago 502nd m-tkach 🇺🇦 867 68 1ms 21 Dec 2021 503rd fantaize 867 80 126ms 14 days ago 504th RobertHoeh 866 66 124ms 25 Jan 2024 505th jujurocking 865 47 35ms 18 May 2021 505th lynn 865 47 36ms 2 Dec 2021 505th ls-samer-abuthaher 865 47 34ms 6 Oct 2022 505th error256 865 47 36ms 3 Jul 2024 509th UnderKoen 🇳🇱 865 92 2ms 6 Jul 2022 510th MeWhenI 🇻🇦 862 128 1ms 18 May 2022 511th Steffan153 🇫🇮 861 44 80ms 15 Aug 2024 512th ovs-code 🇩🇪 859 55 531ms 10 Feb 2025 512th kg583 🇺🇸 859 55 397ms 14 Oct 2025 514th primo-ppcg 🇹🇭 859 92 57ms 18 Jan 2022 514th MeWhenI 🇻🇦 859 92 65ms 21 Aug 2023 514th Herbert00709 🇵🇱 859 92 60ms 24 Feb 2024 514th ovs-code 🇩🇪 859 92 61ms 10 Mar 2025 514th fuzzylojik-golf 🇺🇸 859 92 63ms 29 May 2025 514th DialFrost 🇸🇬 859 92 69ms 15 Dec 2025 520th MeWhenI 🇻🇦 858 42 19ms 8 Mar 2025 521st MeWhenI 🇻🇦 857 48 7ms 13 Aug 2024 521st DialFrost 🇸🇬 857 48 7ms 13 Aug 2024 521st Shanethegamer 🇺🇸 857 48 7ms 15 Aug 2024 521st ovs-code 🇩🇪 857 48 7ms 20 Aug 2024 521st lynn 857 48 7ms 15 Dec 2024 526th DialFrost 🇸🇬 857 67 41ms 29 Oct 2024 526th SirBogman 🇺🇸 857 67 40ms 29 Oct 2024 528th primo-ppcg 🇹🇭 857 74 26ms 4 Feb 2021 528th kg583 🇺🇸 857 74 26ms 28 Jan 2025 530th nwellnhof 🇩🇪 857 104 289ms 22 Dec 2021 531st lynn 856 31 33ms 8 Apr 2021 531st rak1507 🇬🇧 856 31 36ms 18 Oct 2021 533rd mattiapenati 856 81 129ms 28 Nov 2020 533rd Shanethegamer 🇺🇸 856 81 122ms 13 Mar 2023 533rd emgordon154 856 81 125ms 19 Feb 2025 533rd DialFrost 🇸🇬 856 81 128ms 5 Apr 2025 533rd fuzzylojik-golf 🇺🇸 856 81 126ms 3 Sep 2025 533rd pardouin 🇫🇷 856 81 128ms 19 Sep 2025 539th AlephSquirrel 854 28 3ms 4 Nov 2025 540th ListeriaM 854 69 2ms 13 Jan 2026 541st RussellEmerine 853 67 124ms 2 Jan 2020 541st hymanimy 853 67 129ms 19 Aug 2021 541st MeWhenI 🇻🇦 853 67 130ms 12 Aug 2022 541st PPKFS 853 67 122ms 10 Dec 2022 541st arutonee1 853 67 112ms 15 Dec 2025 546th GolfingSuccess 🇬🇷 852 27 60ms 25 Jul 2022 546th SniperSmiley 🇺🇸 852 27 78ms 12 Nov 2022 546th prplz 🇦🇺 852 27 72ms 20 Jan 2023 549th prplz 🇦🇺 852 55 11ms 18 Nov 2019 549th ETHproductions 🇺🇸 852 55 10ms 8 Apr 2020 549th efgen 852 55 10ms 8 Jun 2020 549th PatrickStephansen 🇿🇦 852 55 10ms 2 Sep 2020 549th tomtheisen 🇺🇸 852 55 11ms 26 Sep 2020 549th NewDefectus 🇮🇱 852 55 13ms 4 Oct 2020 549th LoLoLucky 852 55 11ms 7 Dec 2020 549th nwellnhof 🇩🇪 852 55 11ms 10 Jan 2021 549th didion0 🇺🇸 852 55 10ms 9 Mar 2021 549th ScottHamper 852 55 10ms 26 May 2021 549th itsh01 852 55 11ms 10 Aug 2021 549th jakzo 852 55 11ms 5 Sep 2021 First Prev 481–560 of 4,425 Next Last