The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 26 hours. Why not try and solve them ahead of time?
Leyland 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 878th SadiinsoSnowfall 🇫🇷 691 97 9ms 7 Mar 2024 882nd DialFrost 🇸🇬 691 139 189ms 10 Nov 2025 883rd atazzam 🇺🇸 690 103 14ms 2 Apr 2022 883rd vishwathg 690 103 10ms 21 Aug 2022 883rd fredrik-bakke 🇳🇴 690 103 10ms 2 Oct 2022 883rd willschremmer 690 103 10ms 28 Apr 2024 883rd wuzekai518 690 103 10ms 23 Jul 2024 883rd Mabeloid 🇳🇴 690 103 9ms 22 Sep 2024 883rd WillowWispy 690 103 10ms 17 Mar 2025 890th Andriamanitra 🇫🇮 690 108 4ms 13 Jun 2024 891st CaedenHarper 🇨🇦 689 216 309ms 12 Nov 2025 892nd Shanethegamer 🇺🇸 688 116 2ms 2 Mar 2023 893rd MeWhenI 🇻🇦 686 90 1,320ms 12 May 2023 894th tigerdan2 🇩🇪 685 179 483ms 30 Nov 2025 895th janlelis 684 98 10ms 10 Feb 2021 895th nathanadams 🇳🇿 684 98 9ms 18 Aug 2021 895th weliveinhell 🇭🇹 684 98 9ms 23 Oct 2023 895th Protothor 684 98 11ms 20 days ago 899th bac0id 684 182 3,798ms 11 Jan 2025 900th emgordon154 683 51 3ms 13 days ago 901st Attero 🇸🇪 683 69 134ms 18 Oct 2020 902nd ydevor 🇮🇱 683 104 10ms 10 Mar 2021 902nd Fishron 683 104 13ms 19 Oct 2021 904th arctouch-cristiannevianna 683 166 397ms 15 Jun 2023 905th WhoisDavid 683 175 242ms 11 Oct 2020 906th Msleizak 🇫🇷 681 83 4,077ms 12 Dec 2023 906th snoozingnewt 🇨🇦 681 83 285ms 13 Oct 2025 908th raphaelimahorn 681 180 394ms 18 days ago 909th astdefu 681 183 2,893ms 8 Dec 2022 910th FortuiteMan 🇫🇷 681 276 2,011ms 26 Jan 2026 911th Ripick 680 122 165ms 23 May 2025 912th roavin 679 167 443ms 24 Jun 2022 912th Yewzir 🇧🇪 679 167 381ms 9 May 2023 914th daisy-lau 677 99 11ms 31 Jul 2020 914th BBoehm 🇩🇪 677 99 9ms 18 Feb 2021 914th didion0 🇺🇸 677 99 11ms 7 May 2021 914th inventshah 677 99 10ms 6 May 2022 914th LukeBridges 🇬🇧 677 99 9ms 24 Oct 2022 914th madeforlosers 677 99 12ms 6 Nov 2023 914th alexsave 677 99 10ms 29 Oct 2024 914th Lv0Sys 🇵🇱 677 99 11ms 3 Dec 2025 922nd DialFrost 🇸🇬 677 118 3ms 13 Apr 2025 923rd msbranicky 677 142 189ms 1 Jan 2024 924th NewDefectus 🇮🇱 677 156 2ms 23 Jun 2021 925th Yax42 🇫🇷 677 181 409ms 7 Oct 2025 926th mathwiz42 676 105 10ms 18 Aug 2020 926th PFischbeck 676 105 11ms 31 Oct 2020 926th estomagordo 🇳🇱 676 105 9ms 6 Dec 2021 926th 0dyse 676 105 14ms 12 Sep 2025 930th RockOfStone 675 112 2ms 8 Nov 2021 931st AlexDaniel 🇪🇪 673 70 138ms 17 Aug 2020 932nd Shanethegamer 🇺🇸 673 168 106ms 17 Feb 2023 933rd jerrandolph 673 221 293ms 21 Oct 2023 933rd dbut2 🇦🇺 673 221 309ms 18 Jul 2024 935th GrayJoKing 🇦🇺 671 95 160ms 14 Aug 2024 935th MeWhenI 🇻🇦 671 95 142ms 25 Oct 2024 937th msbranicky 671 119 5ms 8 Aug 2023 938th SirBogman 🇺🇸 670 100 10ms 29 Nov 2021 938th Giga-Bowser 670 100 9ms 3 Jan 2022 938th Andrey-Plotnikov 670 100 10ms 19 Aug 2023 938th coreynash 670 100 10ms 3 Nov 2023 942nd DialFrost 🇸🇬 670 105 9ms 6 Nov 2025 943rd artieleach 670 106 14ms 7 Feb 2021 943rd martinnorling 🇸🇪 670 106 10ms 31 Jan 2022 943rd dylanjones92 670 106 10ms 26 Jan 2024 943rd Europe2048 670 106 10ms 18 days ago 947th Yewzir 🇧🇪 670 183 386ms 2 Oct 2025 948th Yewzir 🇧🇪 669 91 2ms 19 Dec 2024 949th frosster 🇨🇦 669 113 2ms 14 May 2023 950th Liibe 666 184 471ms 25 Sep 2025 951st GolfingSuccess 🇬🇷 666 187 76ms 8 Nov 2023 952nd pkasting 665 159 4ms 6 Sep 2020 952nd Alex-x90 🇺🇸 665 159 2ms 10 Dec 2024 954th fitzdotlol 🇺🇸 664 101 9ms 28 Mar 2022 955th dostuffthatmatters 664 107 10ms 26 Jul 2020 955th guilhem-roy 🇫🇷 664 107 10ms 28 Feb 2022 955th celiendonze 🇨🇭 664 107 13ms 20 Apr 2023 955th Stockoh 🇫🇷 664 107 17ms 2 Oct 2024 955th tomh1012 664 107 10ms 24 Feb 2026 960th snoozingnewt 🇨🇦 663 71 130ms 13 Oct 2025 First Prev 881–960 of 1,916 Next Last