The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 19 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 Yewzir 🇧🇪 749 147 135ms 21 Dec 2023 322nd voytxt 🇨🇿 747 211 1,446ms 26 Jan 2025 323rd jared-hughes 746 149 462ms 13 Feb 2023 324th c0d3-4-F00d 🇩🇪 745 120 1ms 11 Feb 2022 325th edsrzf 🇳🇿 744 133 6ms 3 days ago 326th jared-hughes 743 95 35ms 20 Sep 2022 327th helbling 🇨🇭 743 109 9ms 16 May 2024 328th krisktopher 742 104 10ms 15 Nov 2023 328th CornerMercury 🇬🇧 742 104 10ms 21 Nov 2025 330th Alex-x90 🇺🇸 741 150 65ms 14 Nov 2022 330th inventshah 741 150 57ms 16 Nov 2022 332nd CaedenHarper 🇨🇦 741 157 551ms 6 Oct 2025 333rd nwellnhof 🇩🇪 740 58 144ms 28 Jan 2022 333rd SirBogman 🇺🇸 740 58 173ms 4 Apr 2022 335th DialFrost 🇸🇬 740 151 111ms 2 Dec 2025 336th scpchicken 🇵🇼 739 96 3ms 14 Jun 2023 336th o0lit3 🇺🇸 739 96 3ms 15 Jun 2023 336th saito-ta 🇯🇵 739 96 3ms 4 Aug 2025 339th emgordon154 738 99 492ms 3 May 2025 340th CaedenHarper 🇨🇦 738 138 402ms 19 Oct 2025 341st KrausRaus 🇺🇸 737 110 10ms 3 Jan 2023 342nd ovs-code 🇩🇪 736 151 61ms 3 Jun 2024 343rd kg583 🇺🇸 735 105 10ms 16 Nov 2023 343rd markusgraube 735 105 9ms 14 Jun 2024 345th emgordon154 734 150 125ms 27 Feb 2025 346th ovs-code 🇩🇪 733 98 64ms 1 Oct 2023 347th emgordon154 733 121 8ms 6 Dec 2024 348th JohandeRuiter 🇳🇱 733 122 1ms 25 Mar 2024 349th m-tkach 🇺🇦 732 139 366ms 27 Oct 2022 350th m-tkach 🇺🇦 732 152 62ms 27 Oct 2022 351st w911 731 176 272ms 9 Oct 2024 352nd bizy-coder 730 100 534ms 17 Jan 2024 353rd CaedenHarper 🇨🇦 730 111 10ms 29 Aug 2025 354th m-tkach 🇺🇦 728 106 10ms 26 Jan 2022 354th bzijlema 🇳🇱 728 106 10ms 28 Jan 2025 356th MeWhenI 🇻🇦 727 97 33ms 5 May 2025 357th Yewzir 🇧🇪 727 122 6ms 18 Dec 2023 358th Re-Adventures 🇮🇳 727 123 1ms 11 Feb 2022 359th JRaspass 🇬🇧 727 177 292ms 7 Feb 2024 360th andersk 🇺🇸 724 152 128ms 30 Oct 2022 361st emgordon154 723 112 9ms 16 Nov 2024 362nd primo-ppcg 🇹🇭 723 159 15ms 16 Feb 2022 363rd jared-hughes 721 107 10ms 27 May 2022 363rd AlephSquirrel 721 107 9ms 17 Jan 2023 363rd neel11235813 721 107 10ms 3 Apr 2023 363rd StefanHabel 🇨🇦 721 107 9ms 20 Sep 2023 363rd commandz0 🇺🇸 721 107 10ms 4 Sep 2025 368th pandapawskat 721 124 1ms 29 Feb 2024 369th stefangimmillaro 720 98 35ms 8 Aug 2023 370th primo-ppcg 🇹🇭 720 131 4ms 6 Aug 2023 371st Yewzir 🇧🇪 718 157 454ms 21 Dec 2023 372nd DialFrost 🇸🇬 718 162 389ms 24 Sep 2025 373rd AdrienHache 🇫🇷 717 142 428ms 18 Aug 2025 374th m-tkach 🇺🇦 716 102 518ms 20 Jan 2024 375th marshallward 🇺🇸 715 123 40ms 6 May 2025 376th kallmi28 🇨🇿 715 125 1ms 9 Nov 2023 377th FlorianCassayre 🇫🇷 714 108 9ms 19 Sep 2023 378th MeWhenI 🇻🇦 713 342 10ms 1 Aug 2023 378th janbehrens 🇩🇪 713 342 10ms 2 Aug 2023 378th frankgraziano 713 342 10ms 6 Aug 2025 378th JOrE20 713 342 10ms 16 Feb 2026 382nd primo-ppcg 🇹🇭 712 139 5ms 29 Jan 2023 383rd jared-hughes 711 114 9ms 13 Feb 2023 384th stefangimmillaro 711 181 316ms 31 Aug 2023 385th scpchicken 🇵🇼 711 343 10ms 30 Jan 2022 385th KatieLG 🇬🇧 711 343 9ms 28 Sep 2024 385th BREMAUCY 🇫🇷 711 343 10ms 18 Feb 2025 388th Shanethegamer 🇺🇸 710 150 1,348ms 7 Mar 2023 389th GolfingSuccess 🇬🇷 709 103 474ms 15 Jan 2024 389th GrayJoKing 🇦🇺 709 103 440ms 15 Jan 2024 389th neel11235813 709 103 480ms 27 Mar 2024 392nd SirBogman 🇺🇸 709 344 10ms 27 Mar 2022 393rd DialFrost 🇸🇬 708 107 1,205ms 1 Sep 2025 394th Natanaelel 🇸🇪 708 109 14ms 27 Jan 2022 394th inventshah 708 109 9ms 16 Nov 2022 394th emgordon154 708 109 10ms 12 Apr 2025 394th DialFrost 🇸🇬 708 109 10ms 16 Apr 2025 398th Irratix 🇳🇱 708 157 438ms 15 Dec 2022 399th verticallity 706 156 142ms 7 Apr 2022 400th inventshah 705 139 2ms 19 Aug 2023 First Prev 321–400 of 1,824 Next Last