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 713th LostSyntax21 🇬🇧 464 65 2ms 19 Jan 2025 713th CornerMercury 🇬🇧 464 65 2ms 28 Jan 2026 723rd Lv0Sys 🇵🇱 464 152 37ms 6 Dec 2025 724th albanian-laundromat 464 211 2ms 13 Jul 2025 725th albanian-laundromat 462 158 482ms 12 Sep 2025 726th FortuiteMan 🇫🇷 462 167 10ms 5 Oct 2023 726th Andrey2001 462 167 9ms 7 days ago 728th msbranicky 462 212 2ms 3 Oct 2023 729th MeWhenI 🇻🇦 462 259 3ms 2 Oct 2022 730th Shanethegamer 🇺🇸 462 341 1,433ms 13 Jan 2025 730th KatieLG 🇬🇧 462 341 1,456ms 13 Jan 2025 730th HumanoidCPU 462 341 1,419ms 13 Jan 2025 730th dokutan 462 341 1,418ms 13 Jan 2025 730th CaedenHarper 🇨🇦 462 341 1,433ms 25 Jan 2025 730th MeWhenI 🇻🇦 462 341 1,445ms 10 Feb 2025 736th bac0id 461 241 72ms 23 Feb 2024 737th Shanethegamer 🇺🇸 460 50 32ms 25 Jan 2022 737th scpchicken 🇵🇼 460 50 33ms 13 Mar 2022 737th yzhs 🇩🇪 460 50 32ms 6 Jun 2022 737th DialFrost 🇸🇬 460 50 33ms 25 Dec 2022 737th neel11235813 460 50 33ms 12 Feb 2023 742nd KatieLG 🇬🇧 460 327 7ms 12 Mar 2023 742nd msbranicky 460 327 6ms 15 Sep 2023 744th albanian-laundromat 459 165 1,134ms 12 Nov 2025 745th janbehrens 🇩🇪 459 168 10ms 1 Jul 2022 745th CommandLeo 🇮🇹 459 168 17ms 14 Nov 2025 747th retrohun 458 184 20ms 30 Jan 2022 748th dokutan 455 241 2ms 26 Oct 2023 749th Bonjour27891 🇻🇳 454 170 20ms 15 Mar 2022 750th frankgraziano 452 203 6ms 8 Feb 2026 751st hamhub7 450 226 374ms 12 Aug 2022 752nd CatsAreFluffy 450 247 92ms 12 Feb 2023 753rd Shanethegamer 🇺🇸 450 307 4ms 7 Feb 2026 753rd dokutan 450 307 2ms 9 days ago 753rd CaedenHarper 🇨🇦 450 307 2ms 9 days ago 756th MeWhenI 🇻🇦 449 158 3ms 16 Apr 2023 757th HumanoidCPU 449 308 2ms 1 Jan 2026 757th KatieLG 🇬🇧 449 308 2ms 21 Feb 2026 759th yzhs 🇩🇪 448 172 16ms 3 Jun 2022 760th MeWhenI 🇻🇦 448 181 10ms 26 Jan 2022 761st voidgloom 446 173 10ms 23 Oct 2024 762nd juliansiebert 🇩🇪 444 186 298ms 4 Aug 2022 763rd eiburns 443 174 9ms 27 Oct 2023 763rd wh3n3v3r 🇨🇿 443 174 10ms 12 Nov 2024 765th RobertHoeh 441 175 10ms 3 Mar 2025 766th DaCuteRaccoon 441 256 464ms 15 May 2022 767th Andrey-Plotnikov 440 184 11ms 27 Sep 2025 768th Msleizak 🇫🇷 439 555 11ms 4 Nov 2022 769th Vaekor 438 176 9ms 3 Aug 2023 769th m42km 438 176 16ms 25 Feb 2024 771st Andrey2001 437 167 443ms 7 days ago 772nd taind772 437 252 184ms 27 Jan 2022 773rd olleicua 🇺🇸 436 186 10ms 2 Feb 2024 774th Msleizak 🇫🇷 436 411 1ms 4 Nov 2022 775th pascscha 433 178 18ms 28 Mar 2022 776th MeWhenI 🇻🇦 431 176 1,022ms 15 Sep 2025 777th wobblybits 431 179 10ms 23 Aug 2025 778th KatieLG 🇬🇧 431 188 10ms 25 Oct 2024 779th dokutan 431 263 118ms 12 Dec 2025 780th Andriamanitra 🇫🇮 430 164 37ms 29 Nov 2023 781st dokutan 430 258 2ms 6 Mar 2024 782nd madex 🇩🇪 429 234 40ms 18 mins ago 783rd KatieLG 🇬🇧 428 165 33ms 13 Apr 2022 784th JRaspass 🇬🇧 427 311 37ms 13 Jun 2022 784th MeWhenI 🇻🇦 427 311 36ms 14 Jun 2022 784th dokutan 427 311 37ms 9 Jun 2024 784th CaedenHarper 🇨🇦 427 311 34ms 22 Jan 2025 788th msbranicky 426 181 16ms 12 Jul 2023 788th AstroOrbis 426 181 10ms 25 Nov 2025 790th Feniske 🇫🇷 425 194 276ms 10 Nov 2023 791st KatieLG-Transpiler 🇬🇧 425 312 35ms 23 Jun 2022 791st KatieLG 🇬🇧 425 312 36ms 30 Sep 2024 793rd trist224 🇫🇷 424 182 17ms 23 Nov 2022 794th eranws 424 191 10ms 2 Sep 2023 795th adoxography 422 167 37ms 20 Mar 2022 796th Msleizak 🇫🇷 422 357 6ms 26 Apr 2023 797th za3k 421 183 11ms 16 Oct 2022 798th dokutan 421 276 371ms 24 Sep 2025 798th h3ra993huskp 🇯🇵 421 276 467ms 30 Nov 2025 800th Hortaros 419 184 10ms 15 Jun 2023 First Prev 721–800 of 1,804 Next Last