The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 33 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 801st Hortaros 419 184 10ms 15 Jun 2023 801st Emutis 🇱🇹 419 184 10ms 27 Dec 2025 803rd prplz 🇦🇺 418 55 33ms 26 Jan 2022 804th KingSkyrock 🇺🇸 418 194 10ms 6 Nov 2022 805th bac0id 418 214 1ms 22 Sep 2023 806th MeWhenI 🇻🇦 416 206 1ms 11 Oct 2023 807th jgbaldwinbrown 416 215 1ms 29 Jun 2022 808th HumanoidCPU 416 319 37ms 9 Mar 2025 809th Shanethegamer 🇺🇸 415 173 69ms 16 Dec 2024 810th TheZwierzLF 🇵🇱 415 176 578ms 8 Dec 2025 811th CheeseCake628 🇳🇴 415 186 10ms 16 Nov 2024 812th ravnskjaer 🇩🇰 415 280 444ms 15 Dec 2025 813th HumanoidCPU 413 255 2,765ms 24 Oct 2024 814th mossprescott 412 187 10ms 9 Jan 2023 814th AlexanderFair 412 187 10ms 26 Jul 2023 816th jtaxen 410 188 16ms 6 Jun 2024 817th codewrite 🇬🇧 407 250 416ms 18 Jan 2026 818th iczelia 🇩🇪 405 244 123ms 19 Oct 2025 819th dokutan 405 249 73ms 12 Dec 2025 820th dokutan 405 260 2,641ms 24 Oct 2024 821st yoshykai 405 287 473ms 8 Apr 2025 821st Schmitt-Very-Cool 405 287 514ms 3 Oct 2025 823rd mrmena 🇦🇺 405 328 37ms 28 Mar 2024 824th msbranicky 404 181 503ms 17 Jan 2024 825th jacekwladzinski 404 191 16ms 6 Oct 2025 826th matejmatik123 🇸🇰 404 275 1,404ms 1 Oct 2025 827th bwat2 404 288 424ms 8 Mar 2022 828th HumanoidCPU 403 201 11ms 29 Aug 2024 829th dokutan 403 280 441ms 27 Dec 2025 830th Waffle3z 403 310 1ms 12 May 2022 830th DaCuteRaccoon 403 310 1ms 15 May 2022 830th KatieLG 🇬🇧 403 310 1ms 22 May 2022 830th KatieLG-Transpiler 🇬🇧 403 310 1ms 24 Jun 2022 830th HumanoidCPU 403 310 1ms 21 May 2024 830th CaedenHarper 🇨🇦 403 310 1ms 16 Aug 2025 830th snoozingnewt 🇨🇦 403 310 1ms 9 Oct 2025 837th retrohun 403 329 36ms 28 Dec 2022 837th msbranicky 403 329 36ms 21 Sep 2023 839th KatieLG 🇬🇧 402 192 23ms 13 Apr 2022 840th edsrzf 🇳🇿 402 220 5ms 30 Oct 2024 841st edsrzf 🇳🇿 401 252 80ms 12 Nov 2024 842nd Mabeloid 🇳🇴 401 311 1ms 4 Oct 2024 843rd Pena86 400 193 10ms 1 Oct 2022 843rd TheZwierzLF 🇵🇱 400 193 16ms 18 May 2025 845th msbranicky 399 278 1ms 28 Sep 2023 846th msbranicky 399 313 1ms 20 Sep 2023 847th KatieLG 🇬🇧 396 464 1,722ms 13 Sep 2025 848th MeWhenI 🇻🇦 394 155 254ms 15 Feb 2023 849th TheZwierzLF 🇵🇱 394 179 36ms 21 Dec 2025 850th twocatsinatrenchcoat 394 196 9ms 12 May 2022 850th elephantpanda 394 196 17ms 10 Aug 2022 850th jfallon1997 394 196 16ms 6 Sep 2022 853rd crizin 🇰🇷 394 295 451ms 9 Sep 2023 854th CheeseCake628 🇳🇴 393 186 629ms 17 Nov 2024 855th albanian-laundromat 393 257 92ms 12 hours ago 856th HumanoidCPU 393 305 3ms 12 Dec 2024 856th dokutan 393 305 3ms 12 Dec 2024 856th KatieLG 🇬🇧 393 305 3ms 3 Jan 2025 856th Shanethegamer 🇺🇸 393 305 3ms 13 Jan 2025 856th BREMAUCY 🇫🇷 393 305 4ms 14 Jan 2025 856th CaedenHarper 🇨🇦 393 305 3ms 16 Aug 2025 862nd LukeBridges 🇬🇧 391 207 11ms 27 Oct 2022 863rd KatieLG 🇬🇧 391 306 2ms 24 Sep 2022 863rd JRaspass 🇬🇧 391 306 2ms 24 Sep 2022 863rd KatieLG-Transpiler 🇬🇧 391 306 3ms 26 Sep 2022 863rd retrohun 391 306 3ms 28 Dec 2022 863rd Shanethegamer 🇺🇸 391 306 2ms 1 Mar 2023 863rd HumanoidCPU 391 306 3ms 28 Apr 2024 863rd Mabeloid 🇳🇴 391 306 2ms 4 Oct 2024 863rd ehulinsky 🇺🇸 391 306 3ms 29 Mar 2025 863rd CaedenHarper 🇨🇦 391 306 2ms 16 Aug 2025 872nd MeWhenI 🇻🇦 391 345 25ms 25 Jan 2022 872nd KatieLG 🇬🇧 391 345 25ms 23 Mar 2024 872nd CaedenHarper 🇨🇦 391 345 24ms 16 Aug 2025 872nd JOrE20 391 345 28ms 14 Feb 2026 876th alphafalfa 390 187 2ms 26 Nov 2024 877th emgordon154 390 261 422ms 14 days ago 878th olleicua 🇺🇸 390 307 4ms 9 Nov 2025 879th KatieLG-Transpiler 🇬🇧 390 346 24ms 24 Jun 2022 880th croc54 388 199 17ms 12 Jan 2025 First Prev 801–880 of 1,809 Next Last
