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 554th dokutan 583 307 1ms 12 Jan 2024 554th HumanoidCPU 583 307 1ms 22 Apr 2024 554th Herbert00709 🇵🇱 583 307 1ms 24 Apr 2024 554th Shanethegamer 🇺🇸 583 307 2ms 15 Aug 2024 554th Mabeloid 🇳🇴 583 307 1ms 4 Oct 2024 554th CaedenHarper 🇨🇦 583 307 2ms 12 Aug 2025 567th SirBogman 🇺🇸 581 142 283ms 25 Jan 2024 568th Shanethegamer 🇺🇸 580 133 9ms 27 Jan 2022 569th annaproxy 580 173 16ms 4 Jan 2023 570th didion0 🇺🇸 579 140 9ms 19 Apr 2022 571st MeWhenI 🇻🇦 579 191 110ms 16 Mar 2022 572nd OllieBoyne 🇬🇧 576 134 10ms 14 Apr 2022 573rd BloodStormKnight 575 141 9ms 15 Oct 2022 574th varhammer 575 172 5ms 13 Dec 2023 575th MichalMarsalek 🇨🇿 575 194 404ms 26 Jan 2022 576th MeWhenI 🇻🇦 575 197 28ms 6 Jun 2023 577th elephantpanda 572 232 35ms 10 Aug 2022 578th stefangimmillaro 571 135 14ms 10 Nov 2023 578th Lv0Sys 🇵🇱 571 135 14ms 27 Feb 2026 580th MeWhenI 🇻🇦 568 188 110ms 16 Oct 2022 581st quimey 567 136 11ms 12 Jun 2023 582nd plcc0 566 179 82ms 10 hours ago 583rd rak1507 🇬🇧 561 41 33ms 26 Jan 2022 583rd jared-hughes 561 41 33ms 29 Mar 2022 585th msbranicky 561 435 10ms 19 Sep 2023 586th w911 560 158 4ms 10 Oct 2024 587th junkondo-jp 559 145 10ms 1 Jun 2024 588th nipzu 556 198 120ms 3 Sep 2022 589th vroup 🇩🇰 555 146 10ms 29 Sep 2022 589th janbehrens 🇩🇪 555 146 8ms 9 Aug 2023 591st GrayJoKing 🇦🇺 555 181 19ms 8 Mar 2023 592nd MeWhenI 🇻🇦 554 177 2ms 12 Sep 2022 593rd blaztoma 🇱🇹 551 128 36ms 15 Oct 2025 594th SniperSmiley 🇺🇸 551 140 12ms 29 Aug 2023 594th PixelSoftwareStudios 🇺🇸 551 140 10ms 11 Jun 2024 596th msbranicky 551 199 2ms 27 Jul 2023 597th namelessiw 549 133 606ms 10 Apr 2024 598th MeWhenI 🇻🇦 549 161 5ms 28 May 2023 599th coreynash 547 148 10ms 27 Nov 2023 600th retrohun 547 228 2ms 1 Jan 2023 601st janbehrens 🇩🇪 546 162 5ms 2 Jul 2023 602nd MeWhenI 🇻🇦 545 164 1ms 26 May 2023 603rd MeWhenI 🇻🇦 545 229 2ms 12 May 2022 603rd GolfingSuccess 🇬🇷 545 229 2ms 16 May 2022 603rd Natanaelel 🇸🇪 545 229 2ms 19 May 2022 603rd lynn 545 229 2ms 27 May 2022 603rd inventshah 545 229 2ms 4 Jun 2022 603rd sisyphus-ppcg 🇦🇺 545 229 2ms 8 Jul 2022 603rd galloj 🇨🇿 545 229 2ms 25 Aug 2022 603rd dokutan 545 229 2ms 5 Oct 2023 603rd stefangimmillaro 545 229 2ms 15 Jul 2025 612th Shanethegamer 🇺🇸 544 149 9ms 27 Jan 2022 613th TobyBoyne 🇬🇧 543 142 9ms 29 Jan 2022 613th Grrisly 543 142 17ms 25 Mar 2024 613th CutSandstone 543 142 10ms 5 Jul 2024 616th Yewzir 🇧🇪 543 158 1ms 15 Oct 2023 617th error256 542 187 77ms 6 hours ago 618th klixel 🇨🇦 542 205 465ms 17 May 2023 619th Salutations45 540 150 9ms 9 Jan 2025 620th snobee 🇨🇦 540 204 148ms 12 Dec 2022 621st MeWhenI 🇻🇦 538 56 2ms 26 Jan 2022 622nd Natanaelel 🇸🇪 537 132 3ms 25 May 2022 623rd Natanaelel 🇸🇪 537 151 9ms 26 Apr 2022 624th HumanoidCPU 537 184 121ms 29 Aug 2024 625th PickausernamePi 536 144 10ms 23 Dec 2022 625th namelessiw 536 144 11ms 10 Apr 2024 625th Just4FunCoder 536 144 10ms 24 Sep 2025 628th ashtraypettingzoo 🇺🇸 535 43 32ms 23 Feb 2023 629th denkyuu1 530 133 37ms 25 Feb 2026 630th msbranicky 530 243 291ms 15 Sep 2023 631st nstearns96 🇬🇧 528 146 9ms 15 Jul 2024 631st Pyroan 528 146 10ms 20 Mar 2025 633rd janbehrens 🇩🇪 526 170 1ms 20 Jul 2022 634th Ripick 526 212 411ms 11 Aug 2024 635th MeWhenI 🇻🇦 525 169 7ms 13 Dec 2023 636th BambooleanLogic 🇸🇪 523 155 9ms 22 Aug 2022 637th blaztoma 🇱🇹 523 217 120ms 27 Dec 2025 638th angel-p57 🇯🇵 523 434 1ms 26 Nov 2023 639th Shanethegamer 🇺🇸 522 194 86ms 10 Mar 2023 640th jhpaques 🇫🇷 521 148 10ms 30 Jul 2022 First Prev 561–640 of 1,821 Next Last