The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
brainfuck 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 jfallon1997 574 280 19ms 13 May 2024 802nd marcin7Cd 573 296 83ms 20 Feb 2021 803rd SniperSmiley 🇺🇸 572 281 24ms 12 Jun 2022 804th janbehrens 🇩🇪 572 311 615ms 24 Apr 2023 804th DialFrost 🇸🇬 572 311 452ms 18 Nov 2025 806th prplz 🇦🇺 570 183 2ms 14 Aug 2020 807th msbranicky 570 346 343ms 9 Jan 2025 808th adamnielson42 🇺🇸 569 228 18ms 23 Feb 2025 809th cbrt-x 569 348 165ms 8 Oct 2023 809th tobeannouncd 569 348 163ms 8 Jan 2024 811th MeWhenI 🇻🇦 568 205 1,446ms 26 Aug 2023 812th mothcolada 🇺🇸 568 283 21ms 13 Apr 2021 812th akshatj27 🇦🇶 568 283 18ms 11 Jan 2022 812th AstroOrbis 568 283 286ms 16 Feb 2026 815th janbehrens 🇩🇪 567 184 2ms 21 Mar 2022 816th AnnoyedArt1256 567 229 19ms 7 Jan 2025 817th osNiko 🇧🇷 566 107 49ms 3 Feb 2026 818th prestosilver 🇺🇸 566 288 409ms 10 days ago 819th aksyristos 565 154 42ms 23 Feb 2026 820th rvdnieuwendijk 🇳🇱 565 184 433ms 15 Oct 2020 821st aditsu 565 325 3,344ms 11 Aug 2025 822nd martinnorling 🇸🇪 564 285 17ms 13 Apr 2022 822nd thomasklunker 564 285 442ms 4 Feb 2023 824th RussellEmerine 564 351 141ms 10 Feb 2021 825th hellopatrick 563 438 34ms 29 Dec 2022 826th Mandrzejy 🇵🇱 561 108 50ms 9 Apr 2024 827th Natanaelel 🇸🇪 560 132 6ms 25 Oct 2023 828th Irratix 🇳🇱 560 238 473ms 3 Aug 2023 829th halworsen 🇳🇴 560 287 305ms 14 Feb 2022 829th nullie 560 287 14ms 7 Jun 2022 829th LostSyntax21 🇬🇧 560 287 25ms 19 Jan 2025 832nd Andrey135296 560 293 435ms 6 Oct 2023 833rd neihousaigaai 559 232 13ms 6 Mar 2022 834th bbakersmith 558 288 125ms 28 Jun 2022 834th jakobkordez 🇸🇮 558 288 14ms 7 Feb 2024 836th sean-niemann 🇺🇸 557 212 203ms 15 Aug 2023 837th typeswitch-dev 🇵🇹 557 233 12ms 28 Jul 2023 838th achimkrause 557 355 175ms 20 Dec 2019 839th cmdrsabre 557 431 123ms 31 Jan 2020 840th andrewgopher 556 289 27ms 25 Jun 2022 840th galloj 🇨🇿 556 289 33ms 10 Jan 2023 840th logvp 556 289 29ms 14 Mar 2025 843rd arcpolaris 556 295 558ms 11 Nov 2025 844th sean-niemann 🇺🇸 555 188 5ms 3 Jun 2022 845th drabart 🇵🇱 555 240 64ms 8 Dec 2023 846th martin-viggiano 555 355 348ms 1 Jul 2022 847th NerdyMcNerd42 554 290 314ms 10 Sep 2022 847th PyryL 🇫🇮 554 290 22ms 20 Aug 2024 849th snoozingnewt 🇨🇦 554 433 128ms 20 Oct 2025 850th MateuszPietrzak 🇵🇱 553 241 449ms 8 Dec 2023 851st inventshah 552 189 5ms 2 Apr 2025 852nd codingisgreatbutiamnot 552 291 237ms 12 Aug 2024 853rd Kacarott 🇦🇺 551 398 9ms 23 Jul 2024 854th malworthy 550 298 405ms 12 Oct 2023 855th Shanethegamer 🇺🇸 549 215 7ms 13 Nov 2022 856th shelerr 547 294 13ms 15 Sep 2022 856th liamLatour 547 294 16ms 21 Jul 2024 858th adlerzei 547 300 431ms 3 May 2022 859th dbut2 🇦🇺 547 360 324ms 15 Jul 2025 860th arjanadriaanse 🇳🇱 547 362 164ms 24 Nov 2021 861st Alex-x90 🇺🇸 546 191 2ms 11 Jul 2023 862nd DialFrost 🇸🇬 545 202 1,118ms 28 Feb 2025 863rd janbehrens 🇩🇪 545 232 299ms 24 Nov 2024 864th ovs-code 🇩🇪 545 235 87ms 12 Sep 2024 865th Kauhentus 545 238 15ms 7 Dec 2019 866th Bonjour27891 🇻🇳 545 295 288ms 15 Jul 2022 866th idoweinstein 545 295 39ms 30 Jul 2022 866th HumanoidCPU 545 295 18ms 31 Mar 2025 869th ericlangedijk 🇸🇮 545 301 385ms 21 Mar 2022 870th MeWhenI 🇻🇦 544 143 6ms 16 Apr 2023 871st m4c0 544 245 63ms 26 Jan 2022 871st Herbert00709 🇵🇱 544 245 673ms 12 Apr 2024 873rd jerrandolph 544 362 316ms 22 Dec 2023 874th JRaspass 🇬🇧 543 363 321ms 23 Sep 2022 875th MeWhenI 🇻🇦 543 454 37ms 14 Jun 2023 876th arvidjonasson 542 246 435ms 8 Jun 2025 877th blaztoma 🇱🇹 542 455 139ms 28 Nov 2025 878th Johannesd3 541 193 2ms 9 Apr 2021 879th madex 🇩🇪 541 297 16ms 9 Jul 2024 880th Yewzir 🇧🇪 541 364 314ms 3 Jan 2024 First Prev 801–880 of 1,458 Next Last