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 550th Mabeloid 🇳🇴 583 307 1ms 4 Oct 2024 550th CaedenHarper 🇨🇦 583 307 2ms 12 Aug 2025 563rd SirBogman 🇺🇸 581 142 283ms 25 Jan 2024 564th Shanethegamer 🇺🇸 580 133 9ms 27 Jan 2022 565th annaproxy 580 173 16ms 4 Jan 2023 566th didion0 🇺🇸 579 140 10ms 19 Apr 2022 567th MeWhenI 🇻🇦 579 191 110ms 16 Mar 2022 568th OllieBoyne 🇬🇧 576 134 10ms 14 Apr 2022 569th BloodStormKnight 575 141 9ms 15 Oct 2022 570th varhammer 575 172 5ms 13 Dec 2023 571st MichalMarsalek 🇨🇿 575 194 404ms 26 Jan 2022 572nd MeWhenI 🇻🇦 575 197 28ms 6 Jun 2023 573rd elephantpanda 572 232 35ms 10 Aug 2022 574th stefangimmillaro 571 135 14ms 10 Nov 2023 574th Lv0Sys 🇵🇱 571 135 14ms 27 Feb 2026 576th MeWhenI 🇻🇦 568 188 110ms 16 Oct 2022 577th quimey 567 136 11ms 12 Jun 2023 578th rak1507 🇬🇧 561 41 33ms 26 Jan 2022 578th jared-hughes 561 41 33ms 29 Mar 2022 580th msbranicky 561 435 10ms 19 Sep 2023 581st w911 560 158 4ms 10 Oct 2024 582nd junkondo-jp 559 145 12ms 1 Jun 2024 583rd nipzu 556 198 120ms 3 Sep 2022 584th vroup 🇩🇰 555 146 10ms 29 Sep 2022 584th janbehrens 🇩🇪 555 146 10ms 9 Aug 2023 586th GrayJoKing 🇦🇺 555 181 19ms 8 Mar 2023 587th MeWhenI 🇻🇦 554 177 2ms 12 Sep 2022 588th plcc0 553 182 67ms 3 hours ago 589th blaztoma 🇱🇹 551 128 36ms 15 Oct 2025 590th SniperSmiley 🇺🇸 551 140 12ms 29 Aug 2023 590th PixelSoftwareStudios 🇺🇸 551 140 10ms 11 Jun 2024 592nd msbranicky 551 199 2ms 27 Jul 2023 593rd namelessiw 549 133 606ms 10 Apr 2024 594th MeWhenI 🇻🇦 549 161 5ms 28 May 2023 595th coreynash 547 148 11ms 27 Nov 2023 596th retrohun 547 228 2ms 1 Jan 2023 597th janbehrens 🇩🇪 546 162 5ms 2 Jul 2023 598th MeWhenI 🇻🇦 545 164 1ms 26 May 2023 599th MeWhenI 🇻🇦 545 229 2ms 12 May 2022 599th GolfingSuccess 🇬🇷 545 229 2ms 16 May 2022 599th Natanaelel 🇸🇪 545 229 2ms 19 May 2022 599th lynn 545 229 2ms 27 May 2022 599th inventshah 545 229 2ms 4 Jun 2022 599th sisyphus-ppcg 🇦🇺 545 229 2ms 8 Jul 2022 599th galloj 🇨🇿 545 229 2ms 25 Aug 2022 599th dokutan 545 229 2ms 5 Oct 2023 599th stefangimmillaro 545 229 2ms 15 Jul 2025 608th Shanethegamer 🇺🇸 544 149 11ms 27 Jan 2022 609th TobyBoyne 🇬🇧 543 142 9ms 29 Jan 2022 609th Grrisly 543 142 17ms 25 Mar 2024 609th CutSandstone 543 142 10ms 5 Jul 2024 612th Yewzir 🇧🇪 543 158 1ms 15 Oct 2023 613th GolfingSuccess 🇬🇷 542 161 4ms 16 Aug 2024 614th klixel 🇨🇦 542 205 465ms 17 May 2023 615th Salutations45 540 150 9ms 9 Jan 2025 616th snobee 🇨🇦 540 204 148ms 12 Dec 2022 617th MeWhenI 🇻🇦 538 56 2ms 26 Jan 2022 618th Natanaelel 🇸🇪 537 132 3ms 25 May 2022 619th Natanaelel 🇸🇪 537 151 10ms 26 Apr 2022 620th HumanoidCPU 537 184 121ms 29 Aug 2024 621st PickausernamePi 536 144 10ms 23 Dec 2022 621st namelessiw 536 144 11ms 10 Apr 2024 621st Just4FunCoder 536 144 10ms 24 Sep 2025 624th ashtraypettingzoo 🇺🇸 535 43 32ms 23 Feb 2023 625th denkyuu1 530 133 37ms 25 Feb 2026 626th error256 530 190 77ms 5 Feb 2025 627th msbranicky 530 243 291ms 15 Sep 2023 628th nstearns96 🇬🇧 528 146 9ms 15 Jul 2024 628th Pyroan 528 146 10ms 20 Mar 2025 630th janbehrens 🇩🇪 526 170 1ms 20 Jul 2022 631st Ripick 526 212 411ms 11 Aug 2024 632nd MeWhenI 🇻🇦 525 169 7ms 13 Dec 2023 633rd BambooleanLogic 🇸🇪 523 155 10ms 22 Aug 2022 634th blaztoma 🇱🇹 523 217 120ms 27 Dec 2025 635th angel-p57 🇯🇵 523 434 1ms 26 Nov 2023 636th jhpaques 🇫🇷 521 148 10ms 30 Jul 2022 637th Qruintrox 520 172 2ms 25 Jun 2023 638th olleicua 🇺🇸 519 136 35ms 15 Feb 2024 639th zakariamouhid 519 156 10ms 5 Mar 2023 640th Shanethegamer 🇺🇸 519 194 86ms 10 Mar 2023 First Prev 561–640 of 1,804 Next Last