The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 22 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 CaedenHarper 🇨🇦 798 112 2ms 11 Aug 2025 242nd edsrzf 🇳🇿 796 172 36ms 3 hours ago 243rd snoozingnewt 🇨🇦 795 97 10ms 1 Mar 2026 244th duckyluuk 🇳🇱 794 92 492ms 9 Jul 2024 245th sisyphus-ppcg 🇦🇺 794 140 67ms 26 Jan 2022 246th Frowny 793 29 33ms 26 Jan 2022 247th primo-ppcg 🇹🇭 793 92 2ms 15 Nov 2022 248th emgordon154 792 50 39ms 14 days ago 249th snoozingnewt 🇨🇦 791 140 109ms 21 Nov 2025 250th namelessiw 789 129 417ms 26 Jul 2025 251st ovs-code 🇩🇪 789 143 444ms 4 Mar 2022 251st DialFrost 🇸🇬 789 143 477ms 21 Dec 2023 253rd NewDefectus 🇮🇱 787 103 9ms 28 Jan 2022 253rd akshatj27 🇦🇶 787 103 10ms 28 Jan 2022 255th clockworknazo 787 152 3ms 12 Jul 2023 256th acotis 786 140 142ms 26 Sep 2025 257th HumanoidCPU 786 141 2ms 24 Dec 2025 258th ovs-code 🇩🇪 784 90 36ms 11 Mar 2024 259th emgordon154 784 114 2ms 7 Feb 2026 260th antimon2 🇯🇵 783 78 911ms 22 Oct 2024 261st emgordon154 783 144 518ms 1 Dec 2025 262nd UnderKoen 🇳🇱 782 229 2ms 29 Jan 2024 263rd primo-ppcg 🇹🇭 781 92 62ms 21 Sep 2023 264th sean-niemann 🇺🇸 781 97 1,090ms 21 Oct 2025 265th GolfingSuccess 🇬🇷 780 110 2ms 19 Nov 2023 266th primo-ppcg 🇹🇭 780 173 25ms 10 Mar 2022 267th Flekay 🇩🇪 779 99 9ms 15 days ago 268th Irratix 🇳🇱 779 104 9ms 29 Jan 2022 269th Yewzir 🇧🇪 779 127 6ms 23 Jan 2025 270th kg583 🇺🇸 778 114 8ms 7 hours ago 271st stefangimmillaro 778 141 2ms 9 Sep 2022 271st KatieLG 🇬🇧 778 141 2ms 28 Sep 2025 273rd Yewzir 🇧🇪 777 115 1ms 17 Feb 2024 273rd gastropner 777 115 1ms 14 Jul 2025 275th tomtheisen 🇺🇸 777 131 375ms 19 Jan 2023 276th Yax42 🇫🇷 776 150 382ms 13 Jan 2026 277th emgordon154 775 91 36ms 25 Sep 2025 278th edsrzf 🇳🇿 774 98 1,072ms 23 Nov 2025 279th sean-niemann 🇺🇸 774 136 2,480ms 30 Oct 2024 280th kg583 🇺🇸 773 131 39ms 20 Mar 2025 281st dylanarmstrong 772 105 8ms 17 Jan 2024 282nd anter69 🇭🇺 771 100 10ms 2 Sep 2022 282nd ryyyn 🇺🇸 771 100 10ms 15 Dec 2025 284th aksyristos 771 116 2ms 8 Dec 2022 284th GolfingSuccess 🇬🇷 771 116 1ms 19 Nov 2023 284th HumanoidCPU 771 116 1ms 29 Aug 2024 287th sean-niemann 🇺🇸 769 115 5ms 17 Feb 2025 288th janlelis 767 92 34ms 26 Jan 2022 288th scpchicken 🇵🇼 767 92 34ms 19 Jan 2023 288th sean-niemann 🇺🇸 767 92 36ms 30 Dec 2025 291st edsrzf 🇳🇿 767 123 5ms 26 Feb 2026 292nd rucin93 🇵🇱 766 112 2ms 18 Nov 2025 293rd NewDefectus 🇮🇱 765 74 52ms 27 Jan 2022 294th emgordon154 765 234 4ms 21 Oct 2025 295th sean-niemann 🇺🇸 764 101 9ms 7 Jan 2026 296th emgordon154 763 138 2,527ms 12 Nov 2024 297th DialFrost 🇸🇬 763 140 107ms 17 Nov 2023 298th ovs-code 🇩🇪 762 207 1,429ms 4 Feb 2025 299th Yax42 🇫🇷 760 134 439ms 13 Jan 2026 300th lynn 759 145 138ms 7 Jul 2024 301st DialFrost 🇸🇬 759 146 1ms 17 Nov 2023 302nd m-tkach 🇺🇦 759 147 308ms 1 Aug 2023 303rd emgordon154 756 98 31ms 22 days ago 304th GolfingSuccess 🇬🇷 756 102 10ms 2 Jun 2022 304th bizy-coder 756 102 9ms 27 Jun 2025 304th MeWhenI 🇻🇦 756 102 11ms 19 Dec 2025 307th xsot 🇸🇬 756 117 4ms 20 May 2025 308th namelessiw 755 154 513ms 15 Nov 2025 309th emgordon154 754 40 2ms 15 days ago 310th sean-niemann 🇺🇸 753 97 466ms 2 Jul 2025 310th kg583 🇺🇸 753 97 423ms 3 Sep 2025 310th snoozingnewt 🇨🇦 753 97 445ms 1 Mar 2026 313th stefangimmillaro 752 102 1,431ms 30 Dec 2024 314th DialFrost 🇸🇬 752 114 2ms 26 Jan 2024 315th RYNO8 751 119 1ms 25 Aug 2023 316th DialFrost 🇸🇬 751 151 111ms 2 Dec 2025 317th voytxt 🇨🇿 750 108 9ms 26 Jan 2025 318th hallvabo 🇳🇴 749 103 10ms 30 Sep 2022 318th 5cw 🇺🇸 749 103 10ms 29 May 2025 320th Yewzir 🇧🇪 749 147 135ms 21 Dec 2023 First Prev 241–320 of 1,822 Next Last