The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. 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 edsrzf 🇳🇿 744 133 6ms 13 hours ago 322nd jared-hughes 743 95 35ms 20 Sep 2022 323rd helbling 🇨🇭 743 109 9ms 16 May 2024 324th krisktopher 742 104 10ms 15 Nov 2023 324th CornerMercury 🇬🇧 742 104 10ms 21 Nov 2025 326th Alex-x90 🇺🇸 741 150 65ms 14 Nov 2022 326th inventshah 741 150 57ms 16 Nov 2022 328th CaedenHarper 🇨🇦 741 157 551ms 6 Oct 2025 329th scpchicken 🇵🇼 739 96 3ms 14 Jun 2023 329th o0lit3 🇺🇸 739 96 3ms 15 Jun 2023 329th saito-ta 🇯🇵 739 96 3ms 4 Aug 2025 332nd emgordon154 738 99 492ms 3 May 2025 333rd CaedenHarper 🇨🇦 738 138 402ms 19 Oct 2025 334th KrausRaus 🇺🇸 737 110 10ms 3 Jan 2023 335th ovs-code 🇩🇪 736 151 62ms 3 Jun 2024 336th kg583 🇺🇸 735 105 10ms 16 Nov 2023 336th markusgraube 735 105 9ms 14 Jun 2024 338th emgordon154 734 150 141ms 27 Feb 2025 339th ovs-code 🇩🇪 733 98 64ms 1 Oct 2023 340th emgordon154 733 121 8ms 6 Dec 2024 341st JohandeRuiter 🇳🇱 733 122 1ms 25 Mar 2024 342nd m-tkach 🇺🇦 732 139 366ms 27 Oct 2022 343rd m-tkach 🇺🇦 731 152 62ms 27 Oct 2022 344th w911 731 176 272ms 9 Oct 2024 345th bizy-coder 730 100 534ms 17 Jan 2024 345th Steffan153 🇫🇮 730 100 467ms 15 Feb 2024 347th CaedenHarper 🇨🇦 730 111 10ms 29 Aug 2025 348th m-tkach 🇺🇦 728 106 10ms 26 Jan 2022 348th bzijlema 🇳🇱 728 106 10ms 28 Jan 2025 350th MeWhenI 🇻🇦 727 97 33ms 5 May 2025 351st Yewzir 🇧🇪 727 122 6ms 18 Dec 2023 352nd Re-Adventures 🇮🇳 727 123 1ms 11 Feb 2022 353rd JRaspass 🇬🇧 727 177 292ms 7 Feb 2024 354th andersk 🇺🇸 724 152 128ms 30 Oct 2022 355th emgordon154 723 112 10ms 16 Nov 2024 356th primo-ppcg 🇹🇭 723 159 15ms 16 Feb 2022 357th jared-hughes 721 107 10ms 27 May 2022 357th AlephSquirrel 721 107 9ms 17 Jan 2023 357th neel11235813 721 107 10ms 3 Apr 2023 357th StefanHabel 🇨🇦 721 107 9ms 20 Sep 2023 357th commandz0 🇺🇸 721 107 10ms 4 Sep 2025 362nd pandapawskat 721 124 1ms 29 Feb 2024 363rd stefangimmillaro 720 98 35ms 8 Aug 2023 364th primo-ppcg 🇹🇭 720 131 4ms 6 Aug 2023 365th Yewzir 🇧🇪 718 157 454ms 21 Dec 2023 366th DialFrost 🇸🇬 718 162 389ms 24 Sep 2025 367th AdrienHache 🇫🇷 717 142 428ms 18 Aug 2025 368th m-tkach 🇺🇦 716 102 518ms 20 Jan 2024 369th marshallward 🇺🇸 715 123 40ms 6 May 2025 370th kallmi28 🇨🇿 715 125 1ms 9 Nov 2023 371st FlorianCassayre 🇫🇷 714 108 9ms 19 Sep 2023 372nd MeWhenI 🇻🇦 713 342 10ms 1 Aug 2023 372nd janbehrens 🇩🇪 713 342 10ms 2 Aug 2023 372nd frankgraziano 713 342 10ms 6 Aug 2025 372nd JOrE20 713 342 10ms 16 Feb 2026 376th primo-ppcg 🇹🇭 712 139 5ms 29 Jan 2023 377th jared-hughes 711 114 14ms 13 Feb 2023 378th edsrzf 🇳🇿 711 140 37ms 11 Dec 2025 379th stefangimmillaro 711 181 316ms 31 Aug 2023 380th scpchicken 🇵🇼 711 343 10ms 30 Jan 2022 380th KatieLG 🇬🇧 711 343 9ms 28 Sep 2024 380th BREMAUCY 🇫🇷 711 343 10ms 18 Feb 2025 383rd Shanethegamer 🇺🇸 710 150 1,348ms 7 Mar 2023 384th GolfingSuccess 🇬🇷 709 103 474ms 15 Jan 2024 384th GrayJoKing 🇦🇺 709 103 440ms 15 Jan 2024 384th neel11235813 709 103 480ms 27 Mar 2024 387th SirBogman 🇺🇸 709 344 10ms 27 Mar 2022 388th DialFrost 🇸🇬 708 107 1,209ms 1 Sep 2025 389th Natanaelel 🇸🇪 708 109 14ms 27 Jan 2022 389th inventshah 708 109 9ms 16 Nov 2022 389th emgordon154 708 109 10ms 12 Apr 2025 389th DialFrost 🇸🇬 708 109 10ms 16 Apr 2025 393rd Irratix 🇳🇱 708 157 438ms 15 Dec 2022 394th verticallity 706 156 142ms 7 Apr 2022 395th inventshah 705 139 2ms 19 Aug 2023 396th nwellnhof 🇩🇪 705 177 5ms 10 Jul 2022 397th KasperKivimaeki 🇫🇮 701 110 10ms 4 Dec 2025 398th AlephSquirrel 699 135 4ms 22 Apr 2023 399th Yewzir 🇧🇪 699 184 279ms 7 Feb 2024 400th anter69 🇭🇺 698 101 37ms 12 Feb 2024 First Prev 321–400 of 1,787 Next Last