The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 24 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 321st voytxt 🇨🇿 747 211 1,446ms 26 Jan 2025 322nd jared-hughes 746 149 462ms 13 Feb 2023 323rd c0d3-4-F00d 🇩🇪 745 120 1ms 11 Feb 2022 324th edsrzf 🇳🇿 744 133 6ms 2 days ago 325th jared-hughes 743 95 35ms 20 Sep 2022 326th helbling 🇨🇭 743 109 9ms 16 May 2024 327th krisktopher 742 104 10ms 15 Nov 2023 327th CornerMercury 🇬🇧 742 104 10ms 21 Nov 2025 329th Alex-x90 🇺🇸 741 150 65ms 14 Nov 2022 329th inventshah 741 150 57ms 16 Nov 2022 331st CaedenHarper 🇨🇦 741 157 551ms 6 Oct 2025 332nd nwellnhof 🇩🇪 740 58 144ms 28 Jan 2022 332nd SirBogman 🇺🇸 740 58 173ms 4 Apr 2022 334th scpchicken 🇵🇼 739 96 3ms 14 Jun 2023 334th o0lit3 🇺🇸 739 96 3ms 15 Jun 2023 334th saito-ta 🇯🇵 739 96 3ms 4 Aug 2025 337th emgordon154 738 99 492ms 3 May 2025 338th CaedenHarper 🇨🇦 738 138 402ms 19 Oct 2025 339th KrausRaus 🇺🇸 737 110 10ms 3 Jan 2023 340th ovs-code 🇩🇪 736 151 61ms 3 Jun 2024 341st kg583 🇺🇸 735 105 10ms 16 Nov 2023 341st markusgraube 735 105 9ms 14 Jun 2024 343rd emgordon154 734 150 125ms 27 Feb 2025 344th ovs-code 🇩🇪 733 98 64ms 1 Oct 2023 345th emgordon154 733 121 8ms 6 Dec 2024 346th JohandeRuiter 🇳🇱 733 122 1ms 25 Mar 2024 347th m-tkach 🇺🇦 732 139 366ms 27 Oct 2022 348th m-tkach 🇺🇦 732 152 62ms 27 Oct 2022 349th w911 731 176 272ms 9 Oct 2024 350th bizy-coder 730 100 534ms 17 Jan 2024 351st CaedenHarper 🇨🇦 730 111 10ms 29 Aug 2025 352nd m-tkach 🇺🇦 728 106 10ms 26 Jan 2022 352nd bzijlema 🇳🇱 728 106 10ms 28 Jan 2025 354th MeWhenI 🇻🇦 727 97 33ms 5 May 2025 355th Yewzir 🇧🇪 727 122 6ms 18 Dec 2023 356th Re-Adventures 🇮🇳 727 123 1ms 11 Feb 2022 357th JRaspass 🇬🇧 727 177 292ms 7 Feb 2024 358th andersk 🇺🇸 724 152 128ms 30 Oct 2022 359th emgordon154 723 112 9ms 16 Nov 2024 360th primo-ppcg 🇹🇭 723 159 15ms 16 Feb 2022 361st jared-hughes 721 107 10ms 27 May 2022 361st AlephSquirrel 721 107 9ms 17 Jan 2023 361st neel11235813 721 107 10ms 3 Apr 2023 361st StefanHabel 🇨🇦 721 107 9ms 20 Sep 2023 361st commandz0 🇺🇸 721 107 10ms 4 Sep 2025 366th pandapawskat 721 124 1ms 29 Feb 2024 367th stefangimmillaro 720 98 35ms 8 Aug 2023 368th primo-ppcg 🇹🇭 720 131 4ms 6 Aug 2023 369th Yewzir 🇧🇪 718 157 454ms 21 Dec 2023 370th DialFrost 🇸🇬 718 162 389ms 24 Sep 2025 371st AdrienHache 🇫🇷 717 142 428ms 18 Aug 2025 372nd m-tkach 🇺🇦 716 102 518ms 20 Jan 2024 373rd marshallward 🇺🇸 715 123 40ms 6 May 2025 374th kallmi28 🇨🇿 715 125 1ms 9 Nov 2023 375th FlorianCassayre 🇫🇷 714 108 9ms 19 Sep 2023 376th MeWhenI 🇻🇦 713 342 10ms 1 Aug 2023 376th janbehrens 🇩🇪 713 342 10ms 2 Aug 2023 376th frankgraziano 713 342 10ms 6 Aug 2025 376th JOrE20 713 342 10ms 16 Feb 2026 380th primo-ppcg 🇹🇭 712 139 5ms 29 Jan 2023 381st jared-hughes 711 114 9ms 13 Feb 2023 382nd stefangimmillaro 711 181 316ms 31 Aug 2023 383rd scpchicken 🇵🇼 711 343 10ms 30 Jan 2022 383rd KatieLG 🇬🇧 711 343 9ms 28 Sep 2024 383rd BREMAUCY 🇫🇷 711 343 10ms 18 Feb 2025 386th Shanethegamer 🇺🇸 710 150 1,348ms 7 Mar 2023 387th GolfingSuccess 🇬🇷 709 103 474ms 15 Jan 2024 387th GrayJoKing 🇦🇺 709 103 440ms 15 Jan 2024 387th neel11235813 709 103 480ms 27 Mar 2024 390th SirBogman 🇺🇸 709 344 10ms 27 Mar 2022 391st DialFrost 🇸🇬 708 107 1,205ms 1 Sep 2025 392nd Natanaelel 🇸🇪 708 109 14ms 27 Jan 2022 392nd inventshah 708 109 9ms 16 Nov 2022 392nd emgordon154 708 109 10ms 12 Apr 2025 392nd DialFrost 🇸🇬 708 109 10ms 16 Apr 2025 396th Irratix 🇳🇱 708 157 438ms 15 Dec 2022 397th verticallity 706 156 142ms 7 Apr 2022 398th inventshah 705 139 2ms 19 Aug 2023 399th nwellnhof 🇩🇪 705 177 5ms 10 Jul 2022 400th ovs-code 🇩🇪 704 61 207ms 8 Jan 2024 First Prev 321–400 of 1,822 Next Last