The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 35 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 anter69 🇭🇺 698 101 37ms 12 Feb 2024 402nd emgordon154 698 110 146ms 16 Nov 2024 403rd itsh01 698 116 10ms 5 Sep 2022 404th commandz0 🇺🇸 696 105 441ms 4 Sep 2025 405th Sakisan 🇧🇪 696 142 118ms 13 Apr 2022 406th michaelmoynihan 695 111 9ms 5 Jan 2026 407th KatieLG-Transpiler 🇬🇧 695 351 10ms 4 Dec 2022 407th lynn 695 351 10ms 17 Oct 2023 409th KasperKivimaeki 🇫🇮 694 160 68ms 27 Nov 2025 410th madex 🇩🇪 693 126 4ms 25 mins ago 411th SirBogman 🇺🇸 692 102 38ms 19 May 2022 412th Re-Adventures 🇮🇳 692 117 10ms 11 Feb 2022 413th m-tkach 🇺🇦 692 168 588ms 25 Sep 2025 414th GrayJoKing 🇦🇺 690 146 87ms 2 Jun 2022 415th Yewzir 🇧🇪 690 161 467ms 17 Feb 2024 416th YAJUE114514 689 112 10ms 10 Dec 2025 417th MeWhenI 🇻🇦 688 260 2ms 20 Apr 2022 418th Lv0Sys 🇵🇱 687 118 10ms 27 Feb 2026 419th annaproxy 686 144 117ms 15 Apr 2022 420th edsrzf 🇳🇿 685 44 3ms 2 hours ago 421st Yewzir 🇧🇪 684 170 396ms 2 Oct 2025 421st stefangimmillaro 684 170 505ms 6 Oct 2025 423rd aposteriorist 🇨🇦 683 113 9ms 30 Jan 2022 423rd aksyristos 683 113 9ms 30 Dec 2022 425th CLOStrophobic 🇮🇹 683 145 5ms 1 Mar 2025 426th JRaspass 🇬🇧 682 104 3ms 10 Jun 2022 426th nephila-nacrea 🇬🇧 682 104 3ms 10 Jun 2022 428th DialFrost 🇸🇬 680 130 4ms 17 Nov 2023 429th HumanoidCPU 679 359 10ms 21 May 2024 430th SirBogman 🇺🇸 677 114 10ms 11 May 2022 430th Babafaba 677 114 10ms 28 Nov 2025 432nd MeWhenI 🇻🇦 677 175 3ms 24 Jul 2023 433rd stefangimmillaro 675 156 2,667ms 11 Nov 2024 434th stefangimmillaro 674 151 446ms 11 Nov 2024 435th RYNO8 671 115 10ms 25 Aug 2023 436th MeWhenI 🇻🇦 670 192 274ms 9 Feb 2023 437th AlephSquirrel 669 148 5ms 17 Mar 2023 438th Natanaelel 🇸🇪 668 148 127ms 16 Jun 2025 439th Yewzir 🇧🇪 668 160 133ms 4 Feb 2024 440th DialFrost 🇸🇬 665 106 34ms 2 Jun 2024 441st annaproxy 665 116 10ms 26 Jan 2022 441st Bubbler-4 665 116 9ms 28 Jan 2022 441st QuincyNash 🇺🇸 665 116 10ms 29 Nov 2022 441st firegene 🇮🇪 665 116 10ms 26 Jan 2023 445th MeWhenI 🇻🇦 665 124 274ms 29 Jan 2023 446th dokutan 665 367 10ms 31 Oct 2023 446th CaedenHarper 🇨🇦 665 367 10ms 24 Jan 2025 448th DialFrost 🇸🇬 660 169 124ms 25 Dec 2023 449th Yewzir 🇧🇪 659 115 945ms 15 Nov 2025 450th Irratix 🇳🇱 659 117 10ms 25 Apr 2022 450th mathisfun271 659 117 9ms 15 Dec 2023 450th ndren 659 117 10ms 25 Jul 2025 450th CaedenHarper 🇨🇦 659 117 11ms 6 Oct 2025 454th tayloia 🇬🇧 659 123 9ms 2 May 2023 454th targrik 659 123 9ms 9 Jun 2025 456th yzhs 🇩🇪 659 150 114ms 26 Jun 2023 457th Alessandro-Balconi 🇮🇹 658 90 89ms 15 Jul 2023 458th CaedenHarper 🇨🇦 658 111 439ms 1 Jan 2026 459th jared-hughes 658 128 2ms 17 Jul 2022 460th MarcMush 🇫🇷 657 93 953ms 7 Jan 2024 461st Jasper-Ty 🇵🇭 657 136 1ms 27 Apr 2024 462nd MeWhenI 🇻🇦 657 153 40ms 4 Sep 2024 463rd emgordon154 657 169 76ms 8 Feb 2026 464th emgordon154 657 196 297ms 17 Jan 2025 465th stefangimmillaro 655 169 102ms 31 Aug 2023 466th Yewzir 🇧🇪 654 145 151ms 22 Dec 2024 467th GrayJoKing 🇦🇺 653 110 62ms 27 Jul 2025 468th DialFrost 🇸🇬 653 150 2ms 15 Apr 2025 469th sean-niemann 🇺🇸 652 112 2ms 19 Nov 2023 469th SirBogman 🇺🇸 652 112 552ms 20 Jan 2024 469th Babafaba 652 112 469ms 28 Nov 2025 472nd error256 652 136 8ms 23 Dec 2024 473rd stefangimmillaro 651 169 133ms 13 Nov 2023 474th pschmid0 🇺🇸 650 136 4ms 23 Oct 2022 475th BlankSpruce 650 171 63ms 9 Jan 2026 476th InigoK 🇺🇸 648 119 9ms 8 Jun 2023 477th error256 648 138 2ms 24 Dec 2024 478th edsrzf 🇳🇿 647 137 7ms 11 Dec 2025 479th blaztoma 🇱🇹 647 205 42ms 27 Dec 2025 480th Yewzir 🇧🇪 646 113 1ms 21 Dec 2023 First Prev 401–480 of 1,804 Next Last