The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 34 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 714th klixel 🇨🇦 764 93 10ms 9 Jan 2026 722nd NewDefectus 🇮🇱 764 95 48ms 8 Jul 2021 723rd StarmaQ 763 99 2ms 22 Jan 2021 723rd edsrzf 🇳🇿 763 99 2ms 30 May 2025 725th ovs-code 🇩🇪 763 124 142ms 28 Nov 2022 726th lynn 763 126 188ms 19 May 2021 727th msbranicky 763 195 291ms 31 Aug 2023 728th targrik 762 88 625ms 13 May 2025 729th DialFrost 🇸🇬 762 157 152ms 7 Nov 2025 730th snoozingnewt 🇨🇦 761 75 97ms 10 Feb 2026 731st DialFrost 🇸🇬 761 260 1,407ms 3 Mar 2025 732nd Andriamanitra 🇫🇮 760 59 471ms 26 Jul 2023 733rd emgordon154 759 62 37ms 13 Nov 2021 733rd KatieLG 🇬🇧 759 62 34ms 10 Apr 2022 733rd jared-hughes 759 62 34ms 20 Sep 2022 736th kkoenig 759 196 308ms 7 Sep 2025 737th janbehrens 🇩🇪 756 93 5ms 29 Oct 2021 738th bbakersmith 756 94 9ms 18 Jul 2021 738th jfallon1997 756 94 11ms 9 Aug 2022 738th wobblybits 756 94 10ms 19 Aug 2025 741st jared-hughes 755 165 2,969ms 24 Jun 2022 741st snyderek 🇺🇸 755 165 2,935ms 18 Dec 2024 743rd prplz 🇦🇺 753 89 552ms 9 Oct 2021 744th anter69 🇭🇺 752 82 1,300ms 17 Sep 2024 744th Shanethegamer 🇺🇸 752 82 66ms 8 Dec 2024 744th edsrzf 🇳🇿 752 82 65ms 31 Jul 2025 747th edsrzf 🇳🇿 752 163 400ms 26 Sep 2025 747th CaedenHarper 🇨🇦 752 163 478ms 9 Oct 2025 749th LeeCamp 748 95 10ms 27 Dec 2021 749th 4ndyJ 🇬🇧 748 95 9ms 7 Feb 2023 749th 0-ag 748 95 11ms 25 Aug 2025 749th nemoyatpeace 748 95 10ms 14 Jan 2026 749th TheSecondComing123 748 95 11ms 5 Feb 2026 754th Shanethegamer 🇺🇸 747 60 616ms 17 Feb 2023 755th GrayJoKing 🇦🇺 747 156 40ms 4 Jan 2023 756th tomtheisen 🇺🇸 745 90 10ms 6 Oct 2020 757th jtaxen 743 92 117ms 19 Jun 2024 758th retrohun 742 82 2ms 9 Nov 2022 759th emgordon154 742 86 143ms 15 Nov 2024 760th Psirving 740 96 10ms 29 Jul 2020 760th henrytranter 740 96 10ms 27 Aug 2020 760th chrishm909 740 96 11ms 23 May 2021 760th sleepyStick 740 96 16ms 3 Dec 2021 760th tterem 740 96 11ms 8 Jun 2022 760th P-Quentin 🇫🇷 740 96 12ms 3 Aug 2022 760th sbyrne51 740 96 10ms 1 Oct 2022 760th NerdyMcNerd42 740 96 10ms 27 Oct 2022 768th CheeseCake628 🇳🇴 739 89 482ms 17 Jan 2024 768th namelessiw 739 89 489ms 5 Mar 2024 770th DialFrost 🇸🇬 739 153 219ms 6 Nov 2025 771st Shanethegamer 🇺🇸 738 158 30ms 20 Sep 2023 772nd jared-hughes 737 38 45ms 2 Aug 2022 772nd Natanaelel 🇸🇪 737 38 41ms 25 Feb 2023 774th janbehrens 🇩🇪 737 76 3ms 29 Oct 2021 775th thisishowmymindworks 🇳🇴 737 91 21ms 5 Oct 2020 776th Herbert00709 🇵🇱 737 169 66ms 4 days ago 777th JRaspass 🇬🇧 736 64 131ms 26 Jul 2020 778th Waffle3z 735 64 47ms 22 Jan 2021 778th olivermrose 🇺🇸 735 64 40ms 3 Oct 2021 780th Irratix 🇳🇱 735 93 118ms 1 Nov 2021 781st GrayJoKing 🇦🇺 735 150 4ms 19 Nov 2025 782nd MeWhenI 🇻🇦 734 77 248ms 29 Jan 2023 783rd GrayJoKing 🇦🇺 734 133 465ms 6 Jun 2022 784th snoozingnewt 🇨🇦 733 77 5ms 13 Oct 2025 785th KrausRaus 🇺🇸 733 96 11ms 21 Dec 2021 786th asadullayev 732 97 15ms 3 Mar 2021 786th befoster 732 97 10ms 10 Apr 2021 786th myleopard 732 97 14ms 15 Oct 2021 786th Andrey135296 732 97 10ms 4 Apr 2022 786th Bodo171 732 97 16ms 25 Nov 2022 791st vgamula 🇺🇦 732 114 9ms 26 Jan 2024 792nd annaproxy 731 155 404ms 1 Apr 2022 792nd snoozingnewt 🇨🇦 731 155 416ms 13 Oct 2025 794th roupiq 🇵🇱 728 171 2,798ms 4 days ago 795th emgordon154 726 85 1,220ms 11 Jan 2026 796th jared-hughes 726 104 14ms 27 Nov 2021 797th inventshah 726 110 2ms 12 Sep 2022 798th ehulinsky 🇺🇸 725 98 10ms 11 Nov 2021 798th Trunksistor 🇫🇷 725 98 10ms 24 May 2022 798th MichaelMBradley 🇨🇦 725 98 10ms 19 Jun 2022 First Prev 721–800 of 1,916 Next Last