The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
ASCII Table 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 560th Natanaelel 🇸🇪 785 131 1ms 26 May 2022 560th User2654 785 131 1ms 10 Feb 2023 560th Shanethegamer 🇺🇸 785 131 1ms 21 Mar 2023 560th BlankSpruce 785 131 2ms 17 Aug 2024 565th snoozingnewt 🇨🇦 785 149 110ms 20 days ago 566th edsrzf 🇳🇿 785 167 3ms 6 days ago 567th CarsonChr 🇺🇸 785 172 132ms 11 Jul 2024 568th MeWhenI 🇻🇦 785 325 9ms 1 Aug 2023 569th Shanethegamer 🇺🇸 784 135 70ms 1 Dec 2024 570th bajorekp 784 142 99ms 1 Jun 2022 571st Shanethegamer 🇺🇸 784 146 118ms 21 Mar 2023 572nd Argeento 🇵🇱 784 148 10ms 15 Sep 2023 573rd Shanethegamer 🇺🇸 784 173 119ms 15 Oct 2022 574th MeWhenI 🇻🇦 783 96 262ms 28 Jan 2023 575th Shanethegamer 🇺🇸 783 130 163ms 1 May 2023 576th YuryChaikou-ServiceNow 782 156 390ms 27 Oct 2022 576th h45h74x 782 156 377ms 5 Nov 2025 578th rowan-OzRunways 782 169 707ms 19 Jul 2023 579th b-illy 🇬🇧 781 110 9ms 12 Aug 2024 579th CaedenHarper 🇨🇦 781 110 10ms 19 Sep 2024 579th frankgraziano 781 110 10ms 14 Mar 2025 579th YAJUE114514 781 110 10ms 10 Dec 2025 583rd emgordon154 780 139 6ms 13 Dec 2024 584th MeWhenI 🇻🇦 780 150 1ms 20 Feb 2023 584th Shanethegamer 🇺🇸 780 150 2ms 21 Mar 2023 586th rotary-o 🇯🇵 780 166 387ms 4 May 2023 587th janbehrens 🇩🇪 779 116 4ms 3 Jul 2023 587th emplv 🇱🇻 779 116 5ms 4 Jun 2025 589th DialFrost 🇸🇬 779 132 1ms 14 Dec 2023 590th ovs-code 🇩🇪 779 149 11ms 28 Mar 2022 590th stefangimmillaro 779 149 9ms 2 Oct 2022 590th coreynash 779 149 12ms 2 Dec 2022 593rd blaztoma 🇱🇹 779 197 26ms 5 Jan 2026 594th CaedenHarper 🇨🇦 778 107 472ms 19 Sep 2024 595th Ripick 778 143 120ms 4 Feb 2023 596th MeWhenI 🇻🇦 778 156 457ms 17 Apr 2024 597th SirBogman 🇺🇸 778 328 10ms 27 Mar 2022 598th shinh 777 97 35ms 28 Jun 2022 599th memiamp 🇬🇧 777 157 412ms 19 Oct 2022 600th SirBogman 🇺🇸 776 76 42ms 29 Oct 2022 601st dokutan 776 167 480ms 24 Sep 2025 602nd JPRuskin 🇬🇧 775 97 277ms 1 May 2024 602nd HeyItsGilbert 775 97 282ms 1 May 2024 604th annaproxy 775 155 70ms 3 Jan 2023 605th J00LZ 775 174 131ms 5 May 2022 605th CSRessel 775 174 147ms 13 Sep 2025 607th Yewzir 🇧🇪 775 186 302ms 7 Feb 2024 608th branchmispredictor 774 111 11ms 14 Mar 2025 609th Shanethegamer 🇺🇸 774 150 10ms 26 Mar 2022 609th jared-hughes 774 150 10ms 27 Mar 2022 609th voytxt 🇨🇿 774 150 12ms 4 Jun 2023 609th lifthrasiir 🇰🇷 774 150 11ms 23 Nov 2024 613th annaproxy 773 133 1ms 4 Jun 2023 613th kkoenig 773 133 1ms 30 Dec 2023 615th LS2021 772 158 424ms 29 Nov 2023 615th TRexOnGit 772 158 420ms 30 Jan 2024 617th emgordon154 772 206 1,524ms 29 May 2025 618th Shanethegamer 🇺🇸 771 108 456ms 18 Jan 2024 619th Shanethegamer 🇺🇸 771 168 472ms 25 Sep 2025 620th IanUtley 771 184 2ms 2 Jul 2024 621st Shanethegamer 🇺🇸 770 130 2,590ms 28 Oct 2024 621st dokutan 770 130 1ms 28 Apr 2025 623rd Phil-RGOMEGA 770 152 2ms 4 May 2023 624th martin-viggiano 770 187 285ms 22 Jun 2022 624th MCausc78 🇺🇦 770 187 326ms 30 Dec 2022 626th lynn 770 215 1ms 16 May 2022 627th Andriamanitra 🇫🇮 769 98 40ms 24 Sep 2022 627th DialFrost 🇸🇬 769 98 40ms 14 Jun 2024 629th CaedenHarper 🇨🇦 768 110 965ms 22 Oct 2025 630th strout 768 149 125ms 21 Aug 2022 631st biocommando 🇫🇮 768 151 10ms 21 Aug 2023 631st Elkfoot2 768 151 13ms 10 Jan 2026 633rd Emutis 🇱🇹 767 112 10ms 5 Nov 2025 634th madex 🇩🇪 767 134 2ms 28 Mar 2022 634th tsunderu 🇯🇵 767 134 1ms 25 Feb 2023 636th MeWhenI 🇻🇦 767 155 3ms 28 Jun 2023 637th commandz0 🇺🇸 764 109 410ms 1 Sep 2025 638th uttumuttu 🇫🇮 763 152 11ms 8 Apr 2022 638th olleicua 🇺🇸 763 152 12ms 6 Feb 2024 640th dokutan 763 169 2ms 5 Aug 2024 First Prev 561–640 of 2,336 Next Last