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 872nd Gaddy 🇫🇷 807 83 400ms 30 May 2022 872nd hemphen 807 83 385ms 29 Aug 2022 872nd ericlangedijk 🇸🇮 807 83 391ms 7 Dec 2022 872nd stefangimmillaro 807 83 478ms 6 Feb 2023 872nd Matgc04 807 83 384ms 25 May 2023 872nd arctouch-cristiannevianna 807 83 386ms 9 Jun 2023 872nd rifatx 807 83 393ms 7 Jul 2024 872nd Yax42 🇫🇷 807 83 385ms 22 May 2025 872nd MeWhenI 🇻🇦 807 83 392ms 19 Jun 2025 872nd fuzzylojik-golf 🇺🇸 807 83 367ms 28 Aug 2025 872nd DialFrost 🇸🇬 807 83 510ms 15 Dec 2025 872nd bilal2709 807 83 428ms 26 Jan 2026 893rd timhaj 🇸🇮 807 98 58ms 12 Sep 2025 893rd snoozingnewt 🇨🇦 807 98 457ms 9 Oct 2025 895th WilliamDeBlieck 806 47 78ms 25 days ago 896th dyc3 806 86 127ms 4 Aug 2020 896th boxjelly 806 86 125ms 10 Feb 2021 896th JGDoerrer 806 86 130ms 17 Jan 2022 896th makononov 806 86 129ms 3 Mar 2025 896th Florian-Mt 806 86 124ms 10 Dec 2025 896th AndreiDTU 806 86 129ms 25 days ago 902nd ccapitalK 805 71 128ms 4 Jan 2020 902nd 77Tigers 805 71 119ms 26 Feb 2021 904th MeWhenI 🇻🇦 805 81 39ms 27 Jun 2022 905th SirBogman 🇺🇸 804 33 33ms 17 Nov 2019 905th Natanaelel 🇸🇪 804 33 36ms 22 Jan 2022 905th 4hg 🇺🇸 804 33 33ms 11 Mar 2025 908th RustemB 🇷🇺 803 42 128ms 28 Feb 2020 908th gmoshkin 803 42 130ms 12 May 2020 910th lynn 803 96 29ms 17 Jul 2023 911th Shanethegamer 🇺🇸 803 111 287ms 7 Feb 2024 912th AlephSquirrel 801 59 429ms 21 Jan 2024 912th m-tkach 🇺🇦 801 59 411ms 21 Jan 2024 912th b-illy 🇬🇧 801 59 406ms 7 Sep 2024 912th lifthrasiir 🇰🇷 801 59 447ms 2 Dec 2024 912th commandz0 🇺🇸 801 59 420ms 1 Sep 2025 917th MeWhenI 🇻🇦 801 66 3ms 10 Sep 2022 917th inventshah 801 66 3ms 10 Sep 2022 917th albanian-laundromat 801 66 3ms 16 Sep 2025 920th primo-ppcg 🇹🇭 800 46 334ms 20 Oct 2020 920th prplz 🇦🇺 800 46 342ms 30 Oct 2020 920th DialFrost 🇸🇬 800 46 1,063ms 10 Oct 2024 920th JayXon 🇺🇸 800 46 274ms 15 Dec 2024 924th MeWhenI 🇻🇦 800 87 436ms 5 Mar 2022 925th kurkale6ka 799 49 5ms 12 Sep 2021 925th Natanaelel 🇸🇪 799 49 7ms 8 May 2023 927th GrayJoKing 🇦🇺 799 77 1,353ms 17 Nov 2021 928th emgordon154 799 145 1,678ms 10 Jan 2026 929th frankgraziano 799 198 37ms 12 Aug 2025 930th Shanethegamer 🇺🇸 798 62 2ms 31 Oct 2022 931st daedals 798 63 9ms 19 Nov 2019 931st rak1507 🇬🇧 798 63 9ms 13 Oct 2020 931st btjones0 798 63 17ms 10 Dec 2021 931st MeWhenI 🇻🇦 798 63 17ms 12 Aug 2022 931st thehylian 798 63 10ms 31 Dec 2022 931st nstearns96 🇬🇧 798 63 18ms 12 Jan 2023 931st DialFrost 🇸🇬 798 63 10ms 10 Oct 2023 931st ballaire 798 63 9ms 22 Jan 2024 931st Bulmenisaurus 798 63 11ms 3 Nov 2024 931st mrondon8 798 63 18ms 4 Dec 2024 931st tjwrenn 798 63 19ms 9 Dec 2024 931st fuzzylojik-golf 🇺🇸 798 63 9ms 6 May 2025 931st anter69 🇭🇺 798 63 10ms 8 Dec 2025 931st zacjl 798 63 19ms 11 Dec 2025 931st ryyyn 🇺🇸 798 63 10ms 31 Dec 2025 931st yujh-yujh 🇬🇸 798 63 11ms 13 days ago 931st blaztoma 🇱🇹 798 63 10ms 3 days ago 948th namcartoon06 798 99 63ms 30 Jun 2023 948th trist224 🇫🇷 798 99 456ms 14 Feb 2024 950th lifthrasiir 🇰🇷 797 30 3ms 28 Nov 2024 951st michaelbaudino 797 51 36ms 18 Oct 2020 951st meenie 797 51 35ms 7 Jan 2021 951st liemvo 🇻🇳 797 51 33ms 11 May 2021 951st Irratix 🇳🇱 797 51 35ms 14 Feb 2022 951st galloj 🇨🇿 797 51 37ms 17 Sep 2022 951st 4hg 🇺🇸 797 51 36ms 11 Aug 2023 951st annaproxy 797 51 37ms 8 Sep 2023 951st LostSyntax21 🇬🇧 797 51 35ms 16 Sep 2024 959th GrayJoKing 🇦🇺 797 62 13ms 3 Feb 2021 960th primo-ppcg 🇹🇭 797 66 89ms 10 Oct 2020 First Prev 881–960 of 4,425 Next Last