The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 17 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 721st amollberg 🇸🇪 465 166 9ms 29 Jan 2022 722nd jerrandolph 465 277 280ms 20 Oct 2023 723rd razetime 464 65 2ms 26 Jan 2022 723rd Shanethegamer 🇺🇸 464 65 2ms 20 May 2022 723rd bwenstar 464 65 2ms 11 Aug 2022 723rd trist224 🇫🇷 464 65 2ms 28 Nov 2022 723rd rucin93 🇵🇱 464 65 2ms 3 May 2023 723rd snoozingnewt 🇨🇦 464 65 2ms 7 Sep 2023 723rd neel11235813 464 65 2ms 20 Nov 2023 723rd FortuiteMan 🇫🇷 464 65 2ms 10 Oct 2024 723rd LostSyntax21 🇬🇧 464 65 2ms 19 Jan 2025 723rd CornerMercury 🇬🇧 464 65 2ms 28 Jan 2026 733rd Lv0Sys 🇵🇱 464 152 37ms 6 Dec 2025 734th albanian-laundromat 464 211 2ms 13 Jul 2025 735th MeWhenI 🇻🇦 463 259 3ms 2 Oct 2022 736th albanian-laundromat 462 158 482ms 12 Sep 2025 737th FortuiteMan 🇫🇷 462 167 10ms 5 Oct 2023 737th Andrey2001 462 167 9ms 7 days ago 739th msbranicky 462 212 2ms 3 Oct 2023 740th bac0id 461 241 69ms 23 Feb 2024 741st Shanethegamer 🇺🇸 460 50 32ms 25 Jan 2022 741st scpchicken 🇵🇼 460 50 33ms 13 Mar 2022 741st yzhs 🇩🇪 460 50 32ms 6 Jun 2022 741st DialFrost 🇸🇬 460 50 33ms 25 Dec 2022 741st neel11235813 460 50 33ms 12 Feb 2023 746th GolfingSuccess 🇬🇷 460 161 4ms 16 Aug 2024 747th KatieLG 🇬🇧 460 327 7ms 12 Mar 2023 747th msbranicky 460 327 6ms 15 Sep 2023 749th Shanethegamer 🇺🇸 460 341 1,433ms 13 Jan 2025 749th KatieLG 🇬🇧 460 341 1,449ms 13 Jan 2025 749th HumanoidCPU 460 341 1,419ms 13 Jan 2025 749th dokutan 460 341 1,418ms 13 Jan 2025 749th CaedenHarper 🇨🇦 460 341 1,411ms 25 Jan 2025 749th MeWhenI 🇻🇦 460 341 1,445ms 10 Feb 2025 755th albanian-laundromat 459 165 1,182ms 12 Nov 2025 756th janbehrens 🇩🇪 459 168 10ms 1 Jul 2022 756th CommandLeo 🇮🇹 459 168 17ms 14 Nov 2025 758th retrohun 458 184 20ms 30 Jan 2022 759th dokutan 455 241 2ms 26 Oct 2023 760th Bonjour27891 🇻🇳 454 170 20ms 15 Mar 2022 761st frankgraziano 454 203 6ms 8 Feb 2026 762nd hamhub7 450 226 374ms 12 Aug 2022 763rd CatsAreFluffy 450 247 86ms 12 Feb 2023 764th MeWhenI 🇻🇦 449 158 3ms 16 Apr 2023 765th yzhs 🇩🇪 448 172 16ms 3 Jun 2022 766th MeWhenI 🇻🇦 448 181 9ms 26 Jan 2022 767th voidgloom 446 173 10ms 23 Oct 2024 768th Shanethegamer 🇺🇸 446 307 4ms 7 Feb 2026 768th dokutan 446 307 2ms 10 days ago 768th CaedenHarper 🇨🇦 446 307 2ms 10 days ago 771st HumanoidCPU 445 308 2ms 1 Jan 2026 771st KatieLG 🇬🇧 445 308 2ms 21 Feb 2026 773rd juliansiebert 🇩🇪 444 186 298ms 4 Aug 2022 774th eiburns 443 174 9ms 27 Oct 2023 774th wh3n3v3r 🇨🇿 443 174 10ms 12 Nov 2024 776th RobertHoeh 441 175 10ms 3 Mar 2025 777th DaCuteRaccoon 441 256 464ms 15 May 2022 778th Andrey-Plotnikov 440 184 9ms 27 Sep 2025 779th Msleizak 🇫🇷 439 555 11ms 4 Nov 2022 780th Vaekor 438 176 9ms 3 Aug 2023 780th m42km 438 176 16ms 25 Feb 2024 782nd Andrey2001 437 167 443ms 7 days ago 783rd taind772 437 252 182ms 27 Jan 2022 784th olleicua 🇺🇸 436 186 10ms 2 Feb 2024 785th Msleizak 🇫🇷 436 411 1ms 4 Nov 2022 786th pascscha 433 178 18ms 28 Mar 2022 787th MeWhenI 🇻🇦 431 176 1,099ms 15 Sep 2025 788th wobblybits 431 179 10ms 23 Aug 2025 789th KatieLG 🇬🇧 431 188 9ms 25 Oct 2024 790th Andriamanitra 🇫🇮 430 164 37ms 29 Nov 2023 791st dokutan 430 258 2ms 6 Mar 2024 792nd KatieLG 🇬🇧 428 165 33ms 13 Apr 2022 793rd JRaspass 🇬🇧 427 311 37ms 13 Jun 2022 793rd MeWhenI 🇻🇦 427 311 36ms 14 Jun 2022 793rd dokutan 427 311 37ms 9 Jun 2024 793rd CaedenHarper 🇨🇦 427 311 34ms 22 Jan 2025 797th msbranicky 426 181 16ms 12 Jul 2023 797th AstroOrbis 426 181 10ms 25 Nov 2025 799th Feniske 🇫🇷 425 194 276ms 10 Nov 2023 800th dokutan 425 263 118ms 12 Dec 2025 First Prev 721–800 of 1,826 Next Last