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 481st bizy-coder 808 103 470ms 15 Jan 2024 481st Yewzir 🇧🇪 808 103 460ms 4 Feb 2024 483rd m-tkach 🇺🇦 808 151 446ms 1 Apr 2022 484th dpethes 808 190 55ms 12 Dec 2025 485th albanian-laundromat 807 124 1ms 2 Oct 2025 486th rucin93 🇵🇱 806 117 1ms 14 Nov 2025 487th primo-ppcg 🇹🇭 806 136 6ms 22 Jan 2023 488th albanian-laundromat 805 179 286ms 8 Dec 2025 489th alemelis 804 104 778ms 3 Apr 2023 490th Languag3 803 107 10ms 3 days ago 491st MeWhenI 🇻🇦 803 128 2ms 27 Mar 2022 491st NewDefectus 🇮🇱 803 128 1ms 2 Apr 2022 491st Romain-1 🇫🇷 803 128 1ms 2 May 2022 491st ListeriaM 803 128 2ms 20 Aug 2023 495th dpethes 803 152 409ms 8 Jan 2024 495th Yewzir 🇧🇪 803 152 395ms 19 Jun 2024 497th emgordon154 803 168 145ms 19 Apr 2025 498th SirBogman 🇺🇸 802 94 38ms 28 Mar 2022 498th prplz 🇦🇺 802 94 36ms 19 May 2022 498th frnco 802 94 36ms 2 Jun 2022 498th stefangimmillaro 802 94 33ms 1 Aug 2022 498th SirBogman 🇺🇸 802 94 35ms 6 Dec 2022 503rd jared-hughes 802 146 2ms 27 Mar 2022 503rd Mabeloid 🇳🇴 802 146 1ms 21 Sep 2024 505th CLOStrophobic 🇮🇹 801 132 41ms 8 Mar 2025 506th Andrey-Plotnikov 800 145 9ms 20 Jun 2025 506th Yax42 🇫🇷 800 145 10ms 20 Jan 2026 506th rucin93 🇵🇱 800 145 9ms 15 Feb 2026 509th emgordon154 800 147 6ms 19 days ago 510th blaztoma 🇱🇹 800 165 227ms 5 Jan 2026 511th IISResetMe 799 94 293ms 12 Jan 2026 512th BREMAUCY 🇫🇷 799 319 10ms 7 Aug 2025 513th blaztoma 🇱🇹 798 86 3ms 1 Feb 2026 514th primo-ppcg 🇹🇭 798 108 6ms 30 Mar 2022 515th AlephSquirrel 797 74 42ms 30 Dec 2022 516th MarcMush 🇫🇷 797 105 1,034ms 5 Jan 2024 517th prestosilver 🇺🇸 797 129 2ms 13 Nov 2025 518th scpchicken 🇵🇼 796 95 3ms 26 Mar 2022 519th pilaf 🇦🇷 796 107 1,397ms 5 Apr 2022 519th Shanethegamer 🇺🇸 796 107 1,393ms 21 Mar 2023 521st albanian-laundromat 796 130 3ms 31 Dec 2025 522nd chunes3 🇺🇸 796 133 63ms 17 Sep 2023 523rd BlankSpruce 796 151 63ms 22 Aug 2024 524th b10011 🇫🇮 795 108 10ms 2 Jan 2023 524th DialFrost 🇸🇬 795 108 11ms 11 Feb 2023 526th Yewzir 🇧🇪 795 128 159ms 14 Sep 2023 527th NewDefectus 🇮🇱 795 146 12ms 10 Jun 2022 527th BambooleanLogic 🇸🇪 795 146 9ms 6 Dec 2022 527th tiadrop 795 146 11ms 7 Jan 2024 530th Salutations45 794 126 1ms 16 Jan 2025 531st janAkali 🇷🇺 794 140 391ms 20 days ago 532nd snoozingnewt 🇨🇦 793 105 414ms 20 Feb 2026 532nd dokutan 793 105 388ms 15 days ago 534th DialFrost 🇸🇬 793 119 97ms 23 Oct 2023 535th emgordon154 793 153 480ms 8 Feb 2026 536th billings7 🇬🇧 793 154 412ms 17 May 2022 536th arctouch-cristiannevianna 793 154 406ms 9 Feb 2024 538th KasperKivimaeki 🇫🇮 792 114 4ms 12 Dec 2025 539th Yewzir 🇧🇪 792 135 7ms 4 Jan 2025 540th CaedenHarper 🇨🇦 792 182 297ms 4 Nov 2025 541st janbehrens 🇩🇪 792 322 10ms 2 Aug 2023 542nd scpchicken 🇵🇼 791 90 129ms 26 Mar 2022 542nd SirFireball3521 791 90 126ms 29 Jul 2023 544th MeWhenI 🇻🇦 791 137 7ms 13 Dec 2023 545th tailorspy 791 152 424ms 24 May 2024 545th zygoloid 791 152 64ms 4 Aug 2024 547th lynn 789 87 2ms 3 Jun 2022 548th helbling 🇨🇭 789 147 10ms 22 Apr 2024 549th oeb25 789 171 129ms 16 May 2022 550th DestyNova 🇮🇪 788 108 1,465ms 14 Aug 2022 551st btjones0 788 109 10ms 27 Mar 2022 551st vishwathg 788 109 10ms 17 Aug 2022 551st LogicalJoe 788 109 10ms 5 Oct 2022 554th janbehrens 🇩🇪 788 154 479ms 16 Nov 2022 555th olleicua 🇺🇸 787 75 41ms 10 Mar 2024 556th postie77 787 155 422ms 16 Mar 2023 557th KatieLG 🇬🇧 787 324 10ms 26 Sep 2024 558th DialFrost 🇸🇬 786 120 1ms 29 Jan 2024 559th anter69 🇭🇺 785 96 36ms 23 Feb 2023 560th c0d3-4-F00d 🇩🇪 785 131 2ms 28 Mar 2022 First Prev 481–560 of 2,336 Next Last