The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 16 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 hallvabo 🇳🇴 749 103 10ms 30 Sep 2022 321st 5cw 🇺🇸 749 103 10ms 29 May 2025 323rd Yewzir 🇧🇪 749 147 135ms 21 Dec 2023 324th jared-hughes 746 149 462ms 13 Feb 2023 325th c0d3-4-F00d 🇩🇪 745 120 1ms 11 Feb 2022 326th edsrzf 🇳🇿 744 133 6ms 3 days ago 327th jared-hughes 743 95 35ms 20 Sep 2022 328th helbling 🇨🇭 743 109 9ms 16 May 2024 329th voytxt 🇨🇿 743 211 1,446ms 26 Jan 2025 330th krisktopher 742 104 10ms 15 Nov 2023 330th CornerMercury 🇬🇧 742 104 10ms 21 Nov 2025 332nd CaedenHarper 🇨🇦 742 157 551ms 6 Oct 2025 333rd Alex-x90 🇺🇸 741 150 65ms 14 Nov 2022 333rd inventshah 741 150 57ms 16 Nov 2022 335th nwellnhof 🇩🇪 740 58 144ms 28 Jan 2022 335th SirBogman 🇺🇸 740 58 173ms 4 Apr 2022 337th DialFrost 🇸🇬 740 151 111ms 2 Dec 2025 338th scpchicken 🇵🇼 739 96 3ms 14 Jun 2023 338th o0lit3 🇺🇸 739 96 3ms 15 Jun 2023 338th saito-ta 🇯🇵 739 96 3ms 4 Aug 2025 341st emgordon154 738 99 492ms 3 May 2025 342nd CaedenHarper 🇨🇦 738 138 402ms 19 Oct 2025 343rd KrausRaus 🇺🇸 737 110 10ms 3 Jan 2023 344th ovs-code 🇩🇪 736 151 61ms 3 Jun 2024 345th kg583 🇺🇸 735 105 10ms 16 Nov 2023 345th markusgraube 735 105 9ms 14 Jun 2024 347th emgordon154 734 150 125ms 27 Feb 2025 348th ovs-code 🇩🇪 733 98 64ms 1 Oct 2023 349th emgordon154 733 121 8ms 6 Dec 2024 350th JohandeRuiter 🇳🇱 733 122 1ms 25 Mar 2024 351st m-tkach 🇺🇦 732 139 366ms 27 Oct 2022 352nd m-tkach 🇺🇦 732 152 62ms 27 Oct 2022 353rd w911 731 176 272ms 9 Oct 2024 354th bizy-coder 730 100 534ms 17 Jan 2024 355th CaedenHarper 🇨🇦 730 111 10ms 29 Aug 2025 356th m-tkach 🇺🇦 728 106 10ms 26 Jan 2022 356th bzijlema 🇳🇱 728 106 10ms 28 Jan 2025 358th MeWhenI 🇻🇦 727 97 33ms 5 May 2025 359th Yewzir 🇧🇪 727 122 6ms 18 Dec 2023 360th Re-Adventures 🇮🇳 727 123 1ms 11 Feb 2022 361st JRaspass 🇬🇧 727 177 292ms 7 Feb 2024 362nd andersk 🇺🇸 724 152 128ms 30 Oct 2022 363rd emgordon154 723 112 9ms 16 Nov 2024 364th primo-ppcg 🇹🇭 723 159 15ms 16 Feb 2022 365th jared-hughes 721 107 10ms 27 May 2022 365th AlephSquirrel 721 107 9ms 17 Jan 2023 365th neel11235813 721 107 10ms 3 Apr 2023 365th StefanHabel 🇨🇦 721 107 9ms 20 Sep 2023 365th commandz0 🇺🇸 721 107 10ms 4 Sep 2025 370th edsrzf 🇳🇿 721 123 8ms 66 mins ago 371st pandapawskat 721 124 1ms 29 Feb 2024 372nd stefangimmillaro 720 98 35ms 8 Aug 2023 373rd primo-ppcg 🇹🇭 720 131 4ms 6 Aug 2023 374th DialFrost 🇸🇬 719 162 389ms 24 Sep 2025 375th Yewzir 🇧🇪 718 157 454ms 21 Dec 2023 376th AdrienHache 🇫🇷 717 142 428ms 18 Aug 2025 377th m-tkach 🇺🇦 716 102 518ms 20 Jan 2024 378th marshallward 🇺🇸 715 123 40ms 6 May 2025 379th kallmi28 🇨🇿 715 125 1ms 9 Nov 2023 380th FlorianCassayre 🇫🇷 714 108 9ms 19 Sep 2023 381st MeWhenI 🇻🇦 713 342 10ms 1 Aug 2023 381st janbehrens 🇩🇪 713 342 10ms 2 Aug 2023 381st frankgraziano 713 342 10ms 6 Aug 2025 381st JOrE20 713 342 10ms 16 Feb 2026 385th primo-ppcg 🇹🇭 712 139 5ms 29 Jan 2023 386th jared-hughes 711 114 9ms 13 Feb 2023 387th stefangimmillaro 711 181 316ms 31 Aug 2023 388th scpchicken 🇵🇼 711 343 10ms 30 Jan 2022 388th KatieLG 🇬🇧 711 343 9ms 28 Sep 2024 388th BREMAUCY 🇫🇷 711 343 10ms 18 Feb 2025 391st Shanethegamer 🇺🇸 710 150 1,348ms 7 Mar 2023 392nd GolfingSuccess 🇬🇷 709 103 474ms 15 Jan 2024 392nd GrayJoKing 🇦🇺 709 103 440ms 15 Jan 2024 392nd neel11235813 709 103 480ms 27 Mar 2024 395th SirBogman 🇺🇸 709 344 10ms 27 Mar 2022 396th DialFrost 🇸🇬 708 107 1,205ms 1 Sep 2025 397th Natanaelel 🇸🇪 708 109 14ms 27 Jan 2022 397th inventshah 708 109 9ms 16 Nov 2022 397th emgordon154 708 109 10ms 12 Apr 2025 397th DialFrost 🇸🇬 708 109 10ms 16 Apr 2025 First Prev 321–400 of 1,826 Next Last