The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 25 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 401st KasperKivimaeki 🇫🇮 701 110 10ms 4 Dec 2025 402nd AlephSquirrel 699 135 4ms 22 Apr 2023 403rd Yewzir 🇧🇪 699 184 279ms 7 Feb 2024 404th anter69 🇭🇺 698 101 37ms 12 Feb 2024 405th emgordon154 698 110 146ms 16 Nov 2024 406th itsh01 698 116 9ms 5 Sep 2022 407th commandz0 🇺🇸 696 105 441ms 4 Sep 2025 408th Sakisan 🇧🇪 696 142 118ms 13 Apr 2022 409th michaelmoynihan 695 111 9ms 5 Jan 2026 410th KasperKivimaeki 🇫🇮 695 160 68ms 27 Nov 2025 411th KatieLG-Transpiler 🇬🇧 695 351 10ms 4 Dec 2022 411th lynn 695 351 10ms 17 Oct 2023 413th GrayJoKing 🇦🇺 694 146 87ms 2 Jun 2022 414th SirBogman 🇺🇸 692 102 38ms 19 May 2022 415th Re-Adventures 🇮🇳 692 117 10ms 11 Feb 2022 416th m-tkach 🇺🇦 692 168 588ms 25 Sep 2025 417th Yewzir 🇧🇪 691 161 467ms 17 Feb 2024 418th YAJUE114514 689 112 10ms 10 Dec 2025 419th MeWhenI 🇻🇦 688 260 2ms 20 Apr 2022 420th Lv0Sys 🇵🇱 687 118 9ms 27 Feb 2026 421st annaproxy 686 144 117ms 15 Apr 2022 422nd edsrzf 🇳🇿 685 44 3ms 12 hours ago 423rd Yewzir 🇧🇪 684 170 396ms 2 Oct 2025 423rd stefangimmillaro 684 170 505ms 6 Oct 2025 425th aposteriorist 🇨🇦 683 113 9ms 30 Jan 2022 425th aksyristos 683 113 9ms 30 Dec 2022 427th CLOStrophobic 🇮🇹 683 145 5ms 1 Mar 2025 428th JRaspass 🇬🇧 682 104 3ms 10 Jun 2022 428th nephila-nacrea 🇬🇧 682 104 3ms 10 Jun 2022 430th DialFrost 🇸🇬 680 130 4ms 17 Nov 2023 431st HumanoidCPU 679 359 10ms 21 May 2024 432nd SirBogman 🇺🇸 677 114 10ms 11 May 2022 432nd Babafaba 677 114 10ms 28 Nov 2025 434th MeWhenI 🇻🇦 677 175 3ms 24 Jul 2023 435th stefangimmillaro 675 156 2,667ms 11 Nov 2024 436th stefangimmillaro 674 151 446ms 11 Nov 2024 437th RYNO8 671 115 10ms 25 Aug 2023 438th MeWhenI 🇻🇦 670 192 274ms 9 Feb 2023 439th AlephSquirrel 669 148 5ms 17 Mar 2023 440th Natanaelel 🇸🇪 668 148 127ms 16 Jun 2025 441st Yewzir 🇧🇪 668 160 133ms 4 Feb 2024 442nd DialFrost 🇸🇬 665 106 34ms 2 Jun 2024 443rd annaproxy 665 116 10ms 26 Jan 2022 443rd Bubbler-4 665 116 9ms 28 Jan 2022 443rd QuincyNash 🇺🇸 665 116 10ms 29 Nov 2022 443rd firegene 🇮🇪 665 116 10ms 26 Jan 2023 447th MeWhenI 🇻🇦 665 124 274ms 29 Jan 2023 448th dokutan 665 367 10ms 31 Oct 2023 448th CaedenHarper 🇨🇦 665 367 10ms 24 Jan 2025 450th MeWhenI 🇻🇦 662 153 40ms 4 Sep 2024 451st DialFrost 🇸🇬 660 169 124ms 25 Dec 2023 452nd Yewzir 🇧🇪 659 115 1,070ms 15 Nov 2025 453rd Irratix 🇳🇱 659 117 10ms 25 Apr 2022 453rd mathisfun271 659 117 9ms 15 Dec 2023 453rd ndren 659 117 10ms 25 Jul 2025 453rd CaedenHarper 🇨🇦 659 117 11ms 6 Oct 2025 457th tayloia 🇬🇧 659 123 9ms 2 May 2023 457th targrik 659 123 9ms 9 Jun 2025 459th yzhs 🇩🇪 659 150 114ms 26 Jun 2023 460th Alessandro-Balconi 🇮🇹 658 90 89ms 15 Jul 2023 461st CaedenHarper 🇨🇦 658 111 439ms 1 Jan 2026 462nd jared-hughes 658 128 2ms 17 Jul 2022 463rd emgordon154 658 169 76ms 8 Feb 2026 464th MarcMush 🇫🇷 657 93 953ms 7 Jan 2024 465th Jasper-Ty 🇵🇭 657 136 1ms 27 Apr 2024 466th emgordon154 657 196 297ms 17 Jan 2025 467th stefangimmillaro 655 169 102ms 31 Aug 2023 468th Yewzir 🇧🇪 654 145 151ms 22 Dec 2024 469th GrayJoKing 🇦🇺 653 110 62ms 27 Jul 2025 470th DialFrost 🇸🇬 653 150 2ms 15 Apr 2025 471st sean-niemann 🇺🇸 652 112 2ms 19 Nov 2023 471st SirBogman 🇺🇸 652 112 552ms 20 Jan 2024 471st Babafaba 652 112 469ms 28 Nov 2025 474th error256 652 136 8ms 23 Dec 2024 475th stefangimmillaro 651 169 133ms 13 Nov 2023 476th pschmid0 🇺🇸 650 136 4ms 23 Oct 2022 477th BlankSpruce 650 171 59ms 9 Jan 2026 478th InigoK 🇺🇸 648 119 9ms 8 Jun 2023 479th error256 648 138 2ms 24 Dec 2024 480th edsrzf 🇳🇿 647 137 7ms 11 Dec 2025 First Prev 401–480 of 1,821 Next Last