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 721st StarmaQ 763 99 2ms 22 Jan 2021 721st edsrzf 🇳🇿 763 99 2ms 30 May 2025 723rd ovs-code 🇩🇪 763 124 142ms 28 Nov 2022 724th lynn 763 126 188ms 19 May 2021 725th msbranicky 763 195 291ms 31 Aug 2023 726th targrik 762 88 625ms 13 May 2025 727th DialFrost 🇸🇬 762 157 138ms 7 Nov 2025 728th snoozingnewt 🇨🇦 761 75 97ms 10 Feb 2026 729th DialFrost 🇸🇬 761 260 1,423ms 3 Mar 2025 730th Andriamanitra 🇫🇮 760 59 471ms 26 Jul 2023 731st emgordon154 759 62 37ms 13 Nov 2021 731st KatieLG 🇬🇧 759 62 34ms 10 Apr 2022 731st jared-hughes 759 62 34ms 20 Sep 2022 734th kkoenig 759 196 308ms 7 Sep 2025 735th janbehrens 🇩🇪 756 93 5ms 29 Oct 2021 736th bbakersmith 756 94 9ms 18 Jul 2021 736th jfallon1997 756 94 11ms 9 Aug 2022 736th wobblybits 756 94 10ms 19 Aug 2025 739th jared-hughes 755 165 2,969ms 24 Jun 2022 739th snyderek 🇺🇸 755 165 2,935ms 18 Dec 2024 741st prplz 🇦🇺 753 89 552ms 9 Oct 2021 742nd anter69 🇭🇺 752 82 1,300ms 17 Sep 2024 742nd Shanethegamer 🇺🇸 752 82 66ms 8 Dec 2024 742nd edsrzf 🇳🇿 752 82 65ms 31 Jul 2025 745th edsrzf 🇳🇿 752 163 400ms 26 Sep 2025 745th CaedenHarper 🇨🇦 752 163 478ms 9 Oct 2025 747th LeeCamp 748 95 10ms 27 Dec 2021 747th 4ndyJ 🇬🇧 748 95 9ms 7 Feb 2023 747th 0-ag 748 95 11ms 25 Aug 2025 747th nemoyatpeace 748 95 10ms 14 Jan 2026 747th TheSecondComing123 748 95 11ms 5 Feb 2026 752nd Shanethegamer 🇺🇸 747 60 616ms 17 Feb 2023 753rd GrayJoKing 🇦🇺 747 156 40ms 4 Jan 2023 754th tomtheisen 🇺🇸 745 90 10ms 6 Oct 2020 755th jtaxen 743 92 117ms 19 Jun 2024 756th retrohun 742 82 2ms 9 Nov 2022 757th emgordon154 742 86 143ms 15 Nov 2024 758th Psirving 740 96 10ms 29 Jul 2020 758th henrytranter 740 96 10ms 27 Aug 2020 758th chrishm909 740 96 11ms 23 May 2021 758th sleepyStick 740 96 16ms 3 Dec 2021 758th tterem 740 96 11ms 8 Jun 2022 758th P-Quentin 🇫🇷 740 96 12ms 3 Aug 2022 758th sbyrne51 740 96 10ms 1 Oct 2022 758th NerdyMcNerd42 740 96 10ms 27 Oct 2022 766th CheeseCake628 🇳🇴 739 89 482ms 17 Jan 2024 766th namelessiw 739 89 489ms 5 Mar 2024 768th DialFrost 🇸🇬 739 153 209ms 6 Nov 2025 769th Shanethegamer 🇺🇸 738 158 30ms 20 Sep 2023 770th jared-hughes 737 38 45ms 2 Aug 2022 770th Natanaelel 🇸🇪 737 38 41ms 25 Feb 2023 772nd janbehrens 🇩🇪 737 76 3ms 29 Oct 2021 773rd thisishowmymindworks 🇳🇴 737 91 21ms 5 Oct 2020 774th Herbert00709 🇵🇱 737 169 66ms 7 hours ago 775th JRaspass 🇬🇧 736 64 131ms 26 Jul 2020 776th Waffle3z 735 64 47ms 22 Jan 2021 776th olivermrose 🇺🇸 735 64 40ms 3 Oct 2021 778th Irratix 🇳🇱 735 93 118ms 1 Nov 2021 779th GrayJoKing 🇦🇺 735 150 4ms 19 Nov 2025 780th MeWhenI 🇻🇦 734 77 248ms 29 Jan 2023 781st GrayJoKing 🇦🇺 734 133 465ms 6 Jun 2022 782nd snoozingnewt 🇨🇦 733 77 5ms 13 Oct 2025 783rd KrausRaus 🇺🇸 733 96 11ms 21 Dec 2021 784th asadullayev 732 97 15ms 3 Mar 2021 784th befoster 732 97 10ms 10 Apr 2021 784th myleopard 732 97 14ms 15 Oct 2021 784th Andrey135296 732 97 10ms 4 Apr 2022 784th Bodo171 732 97 16ms 25 Nov 2022 789th vgamula 🇺🇦 732 114 9ms 26 Jan 2024 790th annaproxy 731 155 404ms 1 Apr 2022 790th snoozingnewt 🇨🇦 731 155 416ms 13 Oct 2025 792nd roupiq 🇵🇱 728 171 2,798ms 7 hours ago 793rd emgordon154 726 85 1,220ms 11 Jan 2026 794th jared-hughes 726 104 14ms 27 Nov 2021 795th inventshah 726 110 2ms 12 Sep 2022 796th ehulinsky 🇺🇸 725 98 10ms 11 Nov 2021 796th Trunksistor 🇫🇷 725 98 10ms 24 May 2022 796th MichaelMBradley 🇨🇦 725 98 10ms 19 Jun 2022 799th perlebach 🇨🇿 725 143 2,673ms 10 Jun 2025 800th Aurel300 🇨🇭 725 165 228ms 20 Jun 2024 First Prev 721–800 of 1,913 Next Last