The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 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 400th inventshah 708 109 9ms 16 Nov 2022 400th emgordon154 708 109 10ms 12 Apr 2025 400th DialFrost 🇸🇬 708 109 10ms 16 Apr 2025 404th Irratix 🇳🇱 708 157 438ms 15 Dec 2022 405th verticallity 706 156 142ms 7 Apr 2022 406th inventshah 705 139 2ms 19 Aug 2023 407th nwellnhof 🇩🇪 705 177 5ms 10 Jul 2022 408th ovs-code 🇩🇪 704 61 207ms 8 Jan 2024 409th KasperKivimaeki 🇫🇮 701 110 10ms 4 Dec 2025 410th AlephSquirrel 699 135 4ms 22 Apr 2023 411th Yewzir 🇧🇪 699 184 279ms 7 Feb 2024 412th anter69 🇭🇺 698 101 37ms 12 Feb 2024 413th emgordon154 698 110 146ms 16 Nov 2024 414th itsh01 698 116 9ms 5 Sep 2022 415th commandz0 🇺🇸 696 105 441ms 4 Sep 2025 416th Sakisan 🇧🇪 696 142 118ms 13 Apr 2022 417th michaelmoynihan 695 111 9ms 5 Jan 2026 418th KasperKivimaeki 🇫🇮 695 160 68ms 27 Nov 2025 419th KatieLG-Transpiler 🇬🇧 695 351 10ms 4 Dec 2022 419th lynn 695 351 10ms 17 Oct 2023 421st m-tkach 🇺🇦 693 168 588ms 25 Sep 2025 422nd SirBogman 🇺🇸 692 102 38ms 19 May 2022 423rd Re-Adventures 🇮🇳 692 117 10ms 11 Feb 2022 424th Yewzir 🇧🇪 691 161 467ms 17 Feb 2024 425th YAJUE114514 689 112 10ms 10 Dec 2025 426th MeWhenI 🇻🇦 688 260 2ms 20 Apr 2022 427th Lv0Sys 🇵🇱 687 118 9ms 27 Feb 2026 428th annaproxy 686 144 117ms 15 Apr 2022 429th Yewzir 🇧🇪 685 170 396ms 2 Oct 2025 429th stefangimmillaro 685 170 505ms 6 Oct 2025 431st aposteriorist 🇨🇦 683 113 9ms 30 Jan 2022 431st aksyristos 683 113 9ms 30 Dec 2022 433rd CLOStrophobic 🇮🇹 683 145 5ms 1 Mar 2025 434th JRaspass 🇬🇧 682 104 3ms 10 Jun 2022 434th nephila-nacrea 🇬🇧 682 104 3ms 10 Jun 2022 436th DialFrost 🇸🇬 680 130 4ms 17 Nov 2023 437th HumanoidCPU 679 359 10ms 21 May 2024 438th SirBogman 🇺🇸 677 114 10ms 11 May 2022 438th Babafaba 677 114 10ms 28 Nov 2025 440th MeWhenI 🇻🇦 677 175 3ms 24 Jul 2023 441st stefangimmillaro 675 156 2,667ms 11 Nov 2024 442nd stefangimmillaro 674 151 446ms 11 Nov 2024 443rd RYNO8 671 115 10ms 25 Aug 2023 444th MeWhenI 🇻🇦 670 192 274ms 9 Feb 2023 445th AlephSquirrel 669 148 5ms 17 Mar 2023 446th Natanaelel 🇸🇪 668 148 127ms 16 Jun 2025 447th Yewzir 🇧🇪 668 160 133ms 4 Feb 2024 448th DialFrost 🇸🇬 665 106 34ms 2 Jun 2024 449th annaproxy 665 116 10ms 26 Jan 2022 449th Bubbler-4 665 116 9ms 28 Jan 2022 449th QuincyNash 🇺🇸 665 116 10ms 29 Nov 2022 449th firegene 🇮🇪 665 116 10ms 26 Jan 2023 453rd MeWhenI 🇻🇦 665 124 274ms 29 Jan 2023 454th dokutan 665 367 10ms 31 Oct 2023 454th CaedenHarper 🇨🇦 665 367 10ms 24 Jan 2025 456th DialFrost 🇸🇬 661 169 124ms 25 Dec 2023 457th madex 🇩🇪 659 113 4ms 17 hours ago 458th Yewzir 🇧🇪 659 115 1,070ms 15 Nov 2025 459th Irratix 🇳🇱 659 117 10ms 25 Apr 2022 459th mathisfun271 659 117 9ms 15 Dec 2023 459th ndren 659 117 10ms 25 Jul 2025 459th CaedenHarper 🇨🇦 659 117 11ms 6 Oct 2025 463rd tayloia 🇬🇧 659 123 9ms 2 May 2023 463rd targrik 659 123 9ms 9 Jun 2025 465th yzhs 🇩🇪 659 150 114ms 26 Jun 2023 466th Alessandro-Balconi 🇮🇹 658 90 89ms 15 Jul 2023 467th CaedenHarper 🇨🇦 658 111 439ms 1 Jan 2026 468th jared-hughes 658 128 2ms 17 Jul 2022 469th Jasper-Ty 🇵🇭 658 136 1ms 27 Apr 2024 470th GrayJoKing 🇦🇺 658 146 87ms 2 Jun 2022 471st emgordon154 658 169 76ms 8 Feb 2026 472nd MarcMush 🇫🇷 657 93 953ms 7 Jan 2024 473rd MeWhenI 🇻🇦 657 153 40ms 4 Sep 2024 474th emgordon154 657 196 297ms 17 Jan 2025 475th stefangimmillaro 655 169 102ms 31 Aug 2023 476th Yewzir 🇧🇪 654 145 151ms 22 Dec 2024 477th GrayJoKing 🇦🇺 653 110 62ms 27 Jul 2025 478th DialFrost 🇸🇬 653 150 2ms 15 Apr 2025 479th sean-niemann 🇺🇸 652 112 2ms 19 Nov 2023 479th SirBogman 🇺🇸 652 112 552ms 20 Jan 2024 First Prev 401–480 of 1,834 Next Last