The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 39 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 549th CaedenHarper 🇨🇦 583 307 2ms 12 Aug 2025 562nd SirBogman 🇺🇸 581 142 283ms 25 Jan 2024 563rd Shanethegamer 🇺🇸 580 133 9ms 27 Jan 2022 564th annaproxy 580 173 16ms 4 Jan 2023 565th didion0 🇺🇸 579 140 10ms 19 Apr 2022 566th MeWhenI 🇻🇦 579 191 110ms 16 Mar 2022 567th OllieBoyne 🇬🇧 576 134 10ms 14 Apr 2022 568th BloodStormKnight 575 141 9ms 15 Oct 2022 569th varhammer 575 172 5ms 13 Dec 2023 570th MichalMarsalek 🇨🇿 575 194 404ms 26 Jan 2022 571st MeWhenI 🇻🇦 575 197 28ms 6 Jun 2023 572nd elephantpanda 572 232 35ms 10 Aug 2022 573rd stefangimmillaro 571 135 14ms 10 Nov 2023 573rd Lv0Sys 🇵🇱 571 135 14ms 27 Feb 2026 575th MeWhenI 🇻🇦 568 188 110ms 16 Oct 2022 576th quimey 567 136 11ms 12 Jun 2023 577th rak1507 🇬🇧 561 41 33ms 26 Jan 2022 577th jared-hughes 561 41 33ms 29 Mar 2022 579th msbranicky 561 435 10ms 19 Sep 2023 580th w911 560 158 4ms 10 Oct 2024 581st junkondo-jp 559 145 12ms 1 Jun 2024 582nd nipzu 556 198 120ms 3 Sep 2022 583rd vroup 🇩🇰 555 146 10ms 29 Sep 2022 583rd janbehrens 🇩🇪 555 146 10ms 9 Aug 2023 585th GrayJoKing 🇦🇺 555 181 19ms 8 Mar 2023 586th MeWhenI 🇻🇦 554 177 2ms 12 Sep 2022 587th blaztoma 🇱🇹 551 128 36ms 15 Oct 2025 588th SniperSmiley 🇺🇸 551 140 12ms 29 Aug 2023 588th PixelSoftwareStudios 🇺🇸 551 140 10ms 11 Jun 2024 590th msbranicky 551 199 2ms 27 Jul 2023 591st namelessiw 549 133 606ms 10 Apr 2024 592nd MeWhenI 🇻🇦 549 161 5ms 28 May 2023 593rd coreynash 547 148 11ms 27 Nov 2023 594th retrohun 547 228 2ms 1 Jan 2023 595th janbehrens 🇩🇪 546 162 5ms 2 Jul 2023 596th plcc0 546 184 73ms a min ago 597th MeWhenI 🇻🇦 545 164 1ms 26 May 2023 598th MeWhenI 🇻🇦 545 229 2ms 12 May 2022 598th GolfingSuccess 🇬🇷 545 229 2ms 16 May 2022 598th Natanaelel 🇸🇪 545 229 2ms 19 May 2022 598th lynn 545 229 2ms 27 May 2022 598th inventshah 545 229 2ms 4 Jun 2022 598th sisyphus-ppcg 🇦🇺 545 229 2ms 8 Jul 2022 598th galloj 🇨🇿 545 229 2ms 25 Aug 2022 598th dokutan 545 229 2ms 5 Oct 2023 598th stefangimmillaro 545 229 2ms 15 Jul 2025 607th Shanethegamer 🇺🇸 544 149 11ms 27 Jan 2022 608th TobyBoyne 🇬🇧 543 142 9ms 29 Jan 2022 608th Grrisly 543 142 17ms 25 Mar 2024 608th CutSandstone 543 142 10ms 5 Jul 2024 611th Yewzir 🇧🇪 543 158 1ms 15 Oct 2023 612th klixel 🇨🇦 542 205 465ms 17 May 2023 613th Salutations45 540 150 9ms 9 Jan 2025 614th GolfingSuccess 🇬🇷 540 161 4ms 16 Aug 2024 615th snobee 🇨🇦 540 204 148ms 12 Dec 2022 616th MeWhenI 🇻🇦 538 56 2ms 26 Jan 2022 617th Natanaelel 🇸🇪 537 132 3ms 25 May 2022 618th Natanaelel 🇸🇪 537 151 10ms 26 Apr 2022 619th HumanoidCPU 537 184 121ms 29 Aug 2024 620th PickausernamePi 536 144 10ms 23 Dec 2022 620th namelessiw 536 144 11ms 10 Apr 2024 620th Just4FunCoder 536 144 10ms 24 Sep 2025 623rd ashtraypettingzoo 🇺🇸 535 43 32ms 23 Feb 2023 624th denkyuu1 530 133 37ms 25 Feb 2026 625th msbranicky 530 243 291ms 15 Sep 2023 626th nstearns96 🇬🇧 528 146 9ms 15 Jul 2024 626th Pyroan 528 146 10ms 20 Mar 2025 628th error256 528 190 77ms 5 Feb 2025 629th janbehrens 🇩🇪 526 170 1ms 20 Jul 2022 630th Ripick 526 212 411ms 11 Aug 2024 631st MeWhenI 🇻🇦 525 169 7ms 13 Dec 2023 632nd BambooleanLogic 🇸🇪 523 155 10ms 22 Aug 2022 633rd blaztoma 🇱🇹 523 217 120ms 27 Dec 2025 634th angel-p57 🇯🇵 523 434 1ms 26 Nov 2023 635th jhpaques 🇫🇷 521 148 10ms 30 Jul 2022 636th Qruintrox 520 172 2ms 25 Jun 2023 637th olleicua 🇺🇸 519 136 35ms 15 Feb 2024 638th zakariamouhid 519 156 10ms 5 Mar 2023 639th BlankSpruce 518 149 10ms 15 Aug 2024 640th dokutan 518 231 3ms 3 Dec 2025 First Prev 561–640 of 1,798 Next Last