The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 26 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 241st sisyphus-ppcg 🇦🇺 794 140 67ms 26 Jan 2022 242nd Frowny 793 29 33ms 26 Jan 2022 243rd primo-ppcg 🇹🇭 793 92 2ms 15 Nov 2022 244th emgordon154 792 50 39ms 14 days ago 245th snoozingnewt 🇨🇦 791 140 109ms 21 Nov 2025 246th namelessiw 789 129 417ms 26 Jul 2025 247th ovs-code 🇩🇪 789 143 444ms 4 Mar 2022 247th DialFrost 🇸🇬 789 143 477ms 21 Dec 2023 249th NewDefectus 🇮🇱 787 103 9ms 28 Jan 2022 249th akshatj27 🇦🇶 787 103 10ms 28 Jan 2022 251st clockworknazo 787 152 3ms 12 Jul 2023 252nd acotis 786 140 144ms 26 Sep 2025 253rd HumanoidCPU 786 141 2ms 24 Dec 2025 254th ovs-code 🇩🇪 784 90 36ms 11 Mar 2024 255th emgordon154 784 114 2ms 7 Feb 2026 256th antimon2 🇯🇵 783 78 911ms 22 Oct 2024 257th emgordon154 783 144 518ms 1 Dec 2025 258th UnderKoen 🇳🇱 782 229 2ms 29 Jan 2024 259th primo-ppcg 🇹🇭 781 92 62ms 21 Sep 2023 260th sean-niemann 🇺🇸 781 97 1,090ms 21 Oct 2025 261st GolfingSuccess 🇬🇷 780 110 2ms 19 Nov 2023 262nd primo-ppcg 🇹🇭 780 173 25ms 10 Mar 2022 263rd Flekay 🇩🇪 779 99 9ms 15 days ago 264th Irratix 🇳🇱 779 104 11ms 29 Jan 2022 265th Yewzir 🇧🇪 779 127 6ms 23 Jan 2025 266th kg583 🇺🇸 778 114 8ms 3 hours ago 267th stefangimmillaro 778 141 2ms 9 Sep 2022 267th KatieLG 🇬🇧 778 141 2ms 28 Sep 2025 269th Yewzir 🇧🇪 777 115 1ms 17 Feb 2024 269th gastropner 777 115 1ms 14 Jul 2025 271st tomtheisen 🇺🇸 777 131 375ms 19 Jan 2023 272nd Yax42 🇫🇷 776 150 382ms 13 Jan 2026 273rd emgordon154 775 91 36ms 25 Sep 2025 274th edsrzf 🇳🇿 774 98 1,072ms 23 Nov 2025 275th sean-niemann 🇺🇸 774 136 2,561ms 30 Oct 2024 276th kg583 🇺🇸 773 131 39ms 20 Mar 2025 277th dylanarmstrong 772 105 10ms 17 Jan 2024 278th anter69 🇭🇺 771 100 10ms 2 Sep 2022 278th ryyyn 🇺🇸 771 100 10ms 15 Dec 2025 280th aksyristos 771 116 2ms 8 Dec 2022 280th GolfingSuccess 🇬🇷 771 116 1ms 19 Nov 2023 280th HumanoidCPU 771 116 1ms 29 Aug 2024 283rd sean-niemann 🇺🇸 769 115 5ms 17 Feb 2025 284th janlelis 767 92 34ms 26 Jan 2022 284th scpchicken 🇵🇼 767 92 34ms 19 Jan 2023 284th sean-niemann 🇺🇸 767 92 36ms 30 Dec 2025 287th edsrzf 🇳🇿 767 123 5ms 26 Feb 2026 288th rucin93 🇵🇱 766 112 2ms 18 Nov 2025 289th NewDefectus 🇮🇱 765 74 52ms 27 Jan 2022 290th emgordon154 765 234 4ms 21 Oct 2025 291st Steffan153 🇫🇮 764 101 10ms 28 Jun 2024 291st sean-niemann 🇺🇸 764 101 9ms 7 Jan 2026 293rd emgordon154 763 138 2,566ms 12 Nov 2024 294th DialFrost 🇸🇬 763 140 107ms 17 Nov 2023 295th ovs-code 🇩🇪 762 207 1,429ms 4 Feb 2025 296th Yax42 🇫🇷 760 134 439ms 13 Jan 2026 297th lynn 759 145 138ms 7 Jul 2024 298th DialFrost 🇸🇬 759 146 1ms 17 Nov 2023 299th m-tkach 🇺🇦 759 147 308ms 1 Aug 2023 300th emgordon154 756 98 31ms 22 days ago 301st GolfingSuccess 🇬🇷 756 102 10ms 2 Jun 2022 301st bizy-coder 756 102 9ms 27 Jun 2025 301st MeWhenI 🇻🇦 756 102 11ms 19 Dec 2025 304th xsot 🇸🇬 756 117 4ms 20 May 2025 305th namelessiw 755 154 513ms 15 Nov 2025 306th emgordon154 754 40 2ms 14 days ago 307th sean-niemann 🇺🇸 753 97 466ms 2 Jul 2025 307th kg583 🇺🇸 753 97 423ms 3 Sep 2025 307th snoozingnewt 🇨🇦 753 97 445ms 1 Mar 2026 307th Steffan153 🇫🇮 753 97 457ms 4 hours ago 311th stefangimmillaro 752 102 1,431ms 30 Dec 2024 312th DialFrost 🇸🇬 752 114 2ms 26 Jan 2024 313th RYNO8 751 119 1ms 25 Aug 2023 314th DialFrost 🇸🇬 751 151 111ms 2 Dec 2025 315th voytxt 🇨🇿 750 108 11ms 26 Jan 2025 316th edsrzf 🇳🇿 750 135 43ms 19 hours ago 317th hallvabo 🇳🇴 749 103 10ms 30 Sep 2022 317th 5cw 🇺🇸 749 103 10ms 29 May 2025 319th Yewzir 🇧🇪 749 147 138ms 21 Dec 2023 320th voytxt 🇨🇿 747 211 1,549ms 26 Jan 2025 First Prev 241–320 of 1,820 Next Last