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?
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 willschremmer 690 103 10ms 28 Apr 2024 878th wuzekai518 690 103 10ms 23 Jul 2024 878th Mabeloid 🇳🇴 690 103 9ms 22 Sep 2024 878th WillowWispy 690 103 10ms 17 Mar 2025 885th Andriamanitra 🇫🇮 690 108 4ms 13 Jun 2024 886th CaedenHarper 🇨🇦 689 216 309ms 12 Nov 2025 887th Shanethegamer 🇺🇸 688 116 2ms 2 Mar 2023 888th MeWhenI 🇻🇦 686 90 1,320ms 12 May 2023 889th tigerdan2 🇩🇪 685 179 483ms 30 Nov 2025 890th janlelis 684 98 11ms 10 Feb 2021 890th nathanadams 🇳🇿 684 98 9ms 18 Aug 2021 890th weliveinhell 🇭🇹 684 98 10ms 23 Oct 2023 890th Protothor 684 98 17ms 14 days ago 894th bac0id 684 182 3,798ms 11 Jan 2025 895th emgordon154 683 51 3ms 7 days ago 896th Attero 🇸🇪 683 69 112ms 18 Oct 2020 897th ydevor 🇮🇱 683 104 10ms 10 Mar 2021 897th Fishron 683 104 13ms 19 Oct 2021 899th arctouch-cristiannevianna 683 166 397ms 15 Jun 2023 900th WhoisDavid 683 175 227ms 11 Oct 2020 901st Msleizak 🇫🇷 681 83 4,077ms 12 Dec 2023 901st snoozingnewt 🇨🇦 681 83 285ms 13 Oct 2025 903rd raphaelimahorn 681 180 394ms 12 days ago 904th FortuiteMan 🇫🇷 681 276 2,011ms 26 Jan 2026 905th Ripick 680 122 165ms 23 May 2025 906th astdefu 680 183 2,893ms 8 Dec 2022 907th roavin 679 167 443ms 24 Jun 2022 907th Yewzir 🇧🇪 679 167 381ms 9 May 2023 909th daisy-lau 677 99 10ms 31 Jul 2020 909th BBoehm 🇩🇪 677 99 10ms 18 Feb 2021 909th didion0 🇺🇸 677 99 10ms 7 May 2021 909th inventshah 677 99 9ms 6 May 2022 909th LukeBridges 🇬🇧 677 99 10ms 24 Oct 2022 909th madeforlosers 677 99 11ms 6 Nov 2023 909th alexsave 677 99 9ms 29 Oct 2024 909th Lv0Sys 🇵🇱 677 99 13ms 3 Dec 2025 917th DialFrost 🇸🇬 677 118 3ms 13 Apr 2025 918th msbranicky 677 142 189ms 1 Jan 2024 919th NewDefectus 🇮🇱 677 156 2ms 23 Jun 2021 920th Yax42 🇫🇷 677 181 409ms 7 Oct 2025 921st mathwiz42 676 105 10ms 18 Aug 2020 921st PFischbeck 676 105 11ms 31 Oct 2020 921st estomagordo 🇳🇱 676 105 9ms 6 Dec 2021 921st 0dyse 676 105 14ms 12 Sep 2025 925th RockOfStone 675 112 2ms 8 Nov 2021 926th AlexDaniel 🇪🇪 673 70 108ms 17 Aug 2020 927th Shanethegamer 🇺🇸 673 168 99ms 17 Feb 2023 928th jerrandolph 673 221 293ms 21 Oct 2023 928th dbut2 🇦🇺 673 221 309ms 18 Jul 2024 930th GrayJoKing 🇦🇺 671 95 160ms 14 Aug 2024 930th MeWhenI 🇻🇦 671 95 142ms 25 Oct 2024 932nd msbranicky 671 119 5ms 8 Aug 2023 933rd SirBogman 🇺🇸 670 100 9ms 29 Nov 2021 933rd Giga-Bowser 670 100 9ms 3 Jan 2022 933rd Andrey-Plotnikov 670 100 10ms 19 Aug 2023 933rd coreynash 670 100 10ms 3 Nov 2023 937th DialFrost 🇸🇬 670 105 9ms 6 Nov 2025 938th artieleach 670 106 14ms 7 Feb 2021 938th martinnorling 🇸🇪 670 106 10ms 31 Jan 2022 938th dylanjones92 670 106 10ms 26 Jan 2024 938th Europe2048 670 106 10ms 12 days ago 942nd Yewzir 🇧🇪 670 183 386ms 2 Oct 2025 943rd Yewzir 🇧🇪 669 91 2ms 19 Dec 2024 944th frosster 🇨🇦 669 113 2ms 14 May 2023 945th Liibe 666 184 471ms 25 Sep 2025 946th pkasting 665 159 4ms 6 Sep 2020 946th Alex-x90 🇺🇸 665 159 2ms 10 Dec 2024 948th GolfingSuccess 🇬🇷 665 187 88ms 8 Nov 2023 949th fitzdotlol 🇺🇸 664 101 10ms 28 Mar 2022 950th dostuffthatmatters 664 107 10ms 26 Jul 2020 950th guilhem-roy 🇫🇷 664 107 10ms 28 Feb 2022 950th celiendonze 🇨🇭 664 107 13ms 20 Apr 2023 950th Stockoh 🇫🇷 664 107 17ms 2 Oct 2024 950th tomh1012 664 107 10ms 24 Feb 2026 955th snoozingnewt 🇨🇦 663 71 108ms 13 Oct 2025 956th Shanethegamer 🇺🇸 663 93 1,409ms 16 Feb 2023 957th Adelzu 663 171 419ms 21 Nov 2021 957th Matgc04 663 171 413ms 3 Jun 2024 957th postie77 663 171 450ms 14 Aug 2024 960th MeWhenI 🇻🇦 660 113 4ms 23 May 2023 First Prev 881–960 of 1,911 Next Last