The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 28 hours. Why not try and solve them ahead of time?
Number Spiral 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 1st 2bular 1,000 23 34ms 7 Feb 2026 2nd Bubbler-4 973 31 2ms 25 Jan 2022 2nd primo-ppcg 🇹🇭 973 31 2ms 27 Jan 2022 2nd HPWiz 🇳🇿 973 31 2ms 27 Jan 2022 2nd GolfingSuccess 🇬🇷 973 31 2ms 28 Jan 2022 2nd GrayJoKing 🇦🇺 973 31 2ms 28 Jan 2022 2nd Natanaelel 🇸🇪 973 31 2ms 25 Mar 2022 2nd SirBogman 🇺🇸 973 31 2ms 3 Apr 2022 2nd ovs-code 🇩🇪 973 31 2ms 27 May 2022 2nd lynn 973 31 2ms 27 May 2022 2nd zacjl 973 31 2ms 14 Sep 2023 2nd 2bular 973 31 2ms 31 Mar 2024 13th zacjl 964 80 9ms 20 Apr 2023 14th lynn 958 24 33ms 26 Jan 2022 14th primo-ppcg 🇹🇭 958 24 32ms 27 Jan 2022 14th Bubbler-4 958 24 34ms 27 Jan 2022 14th HPWiz 🇳🇿 958 24 32ms 27 Jan 2022 14th ovs-code 🇩🇪 958 24 33ms 27 May 2022 14th Natanaelel 🇸🇪 958 24 32ms 16 Nov 2023 20th lifthrasiir 🇰🇷 952 81 31ms 4 Dec 2024 21st saito-ta 🇯🇵 943 42 39ms 29 Aug 2022 22nd emplv 🇱🇻 942 86 10ms 13 Apr 2022 22nd nwellnhof 🇩🇪 942 86 10ms 6 Jul 2025 24th Natanaelel 🇸🇪 933 46 133ms 5 hours ago 25th vlpx 🇫🇮 931 87 9ms 18 Jun 2024 26th rhdqor213 931 96 1ms 26 Nov 2023 27th nwellnhof 🇩🇪 929 83 10ms 29 Jan 2022 27th Lydxn 🇨🇦 929 83 30ms 28 May 2022 29th error256 928 76 36ms 21 May 2025 30th zacjl 925 79 407ms 5 Oct 2024 31st primo-ppcg 🇹🇭 921 43 39ms 5 Feb 2023 32nd JayXon 🇺🇸 921 88 12ms 8 Oct 2022 33rd stackofbears 920 25 35ms 27 Jan 2022 33rd GrayJoKing 🇦🇺 920 25 33ms 28 Jan 2022 33rd SirBogman 🇺🇸 920 25 34ms 3 Apr 2022 36th JayXon 🇺🇸 917 111 371ms 29 Jan 2022 37th lyphyser 913 62 55ms 1 Feb 2025 38th JayXon 🇺🇸 913 111 78ms 7 Apr 2023 39th ovs-code 🇩🇪 912 67 922ms 23 Jan 2024 40th primo-ppcg 🇹🇭 912 97 5ms 15 Nov 2022 41st saito-ta 🇯🇵 912 98 1ms 18 Oct 2023 41st Steffan153 🇫🇮 912 98 1ms 29 Jan 2024 41st sean-niemann 🇺🇸 912 98 2ms 3 Mar 2024 44th ovs-code 🇩🇪 911 65 105ms 6 Dec 2025 45th nwellnhof 🇩🇪 911 122 58ms 5 Oct 2022 45th JayXon 🇺🇸 911 122 63ms 5 Oct 2022 47th primo-ppcg 🇹🇭 910 78 3ms 26 Jan 2022 48th JayXon 🇺🇸 909 128 487ms 25 Sep 2025 49th sisyphus-ppcg 🇦🇺 907 85 10ms 26 Jan 2022 49th xnor-gate 907 85 10ms 27 Jan 2022 51st bitsandbeyond 🇳🇱 907 91 252ms 16 Jun 2025 52nd lifthrasiir 🇰🇷 902 81 596ms 4 Dec 2024 53rd ovs-code 🇩🇪 902 82 5ms 3 hours ago 54th error256 902 85 1,423ms 19 Nov 2024 55th JayXon 🇺🇸 902 122 135ms 13 Apr 2022 56th canissimia 🇦🇶 901 81 1ms 8 Dec 2025 57th zacjl 900 110 10ms 2 Jan 2025 58th nwellnhof 🇩🇪 900 143 291ms 3 Feb 2022 59th Steffan153 🇫🇮 899 110 124ms 16 Jun 2024 60th error256 898 80 64ms 10 Dec 2024 61st saito-ta 🇯🇵 896 94 12ms 16 Oct 2023 62nd zacjl 896 99 9ms 21 Sep 2024 63rd JayXon 🇺🇸 895 126 464ms 21 Feb 2024 63rd sean-niemann 🇺🇸 895 126 464ms 14 May 2024 65th GrayJoKing 🇦🇺 894 48 125ms 5 hours ago 66th sisyphus-ppcg 🇦🇺 894 100 1ms 16 Oct 2023 67th JayXon 🇺🇸 894 124 1ms 3 Feb 2022 68th canissimia 🇦🇶 894 254 1ms 6 Feb 2022 69th JayXon 🇺🇸 893 86 143ms 29 Oct 2024 70th Steffan153 🇫🇮 893 96 1ms 29 Jan 2024 70th sean-niemann 🇺🇸 893 96 1ms 21 Feb 2024 72nd error256 892 85 882ms 17 Feb 2026 73rd Lydxn 🇨🇦 892 86 1,461ms 27 Sep 2023 74th JayXon 🇺🇸 891 110 2ms 14 Sep 2022 75th canissimia 🇦🇶 891 140 195ms 15 Apr 2023 76th Steffan153 🇫🇮 890 106 4ms 22 Feb 2024 77th lynn 890 111 131ms 15 Jun 2024 78th JayXon 🇺🇸 890 120 115ms 16 Oct 2022 78th Steffan153 🇫🇮 890 120 118ms 26 Jan 2024 78th sean-niemann 🇺🇸 890 120 114ms 17 Feb 2025 1–80 of 1,818 Next Last