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 638th fredrik-bakke 🇳🇴 643 250 26ms 17 Mar 2025 642nd msbranicky 641 369 165ms 19 Sep 2023 643rd jared-hughes 640 208 511ms 2 Nov 2022 644th ZoeyKD 640 251 256ms 14 May 2023 644th janbehrens 🇩🇪 640 251 17ms 24 Nov 2024 646th sean-niemann 🇺🇸 640 278 452ms 24 Sep 2025 647th edsrzf 🇳🇿 640 308 298ms 25 Oct 2024 648th emgordon154 639 136 43ms 14 May 2025 649th KaeruCT 639 203 12ms 2 Sep 2024 650th MeWhenI 🇻🇦 639 213 10ms 13 Dec 2023 651st Shanethegamer 🇺🇸 639 611 1,558ms 8 Apr 2025 652nd KarstenHohmeier 638 172 6ms 7 Mar 2018 653rd amishtal 638 252 24ms 1 Dec 2019 653rd domingues 🇵🇹 638 252 424ms 9 Aug 2022 655th roavin 638 257 472ms 5 Jul 2022 656th bendiscz 638 309 293ms 21 Apr 2020 657th MeWhenI 🇻🇦 638 318 180ms 10 Sep 2022 658th uttumuttu 🇫🇮 636 204 46ms 4 Jan 2022 658th xShadowBlade 636 204 12ms 26 Dec 2024 660th FortuiteMan 🇫🇷 635 253 17ms 7 Dec 2025 661st prplz 🇦🇺 635 342 27ms 28 Sep 2021 662nd jwhear 🇺🇸 634 373 155ms 27 Sep 2024 663rd joegodbehere 633 254 18ms 30 Oct 2020 664th Shanethegamer 🇺🇸 633 389 34ms 30 Dec 2022 665th H3XDaemon 632 165 2ms 20 Dec 2025 666th msbranicky 632 321 11ms 10 Aug 2023 667th lacroixjonathan87 631 174 6ms 10 Aug 2020 668th Chinay-Domitrix 🇺🇸 631 291 3,332ms 12 days ago 669th Artemis21 🇬🇧 630 255 39ms 3 Jan 2025 669th lelbal 630 255 267ms 28 Aug 2025 671st ccbrown 630 313 305ms 21 Apr 2020 672nd Skepfyr 629 376 189ms 4 Jan 2020 673rd JRaspass 🇬🇧 628 141 1,382ms 30 Jan 2023 674th cesarm4 628 256 32ms 9 May 2021 674th ehulinsky 🇺🇸 628 256 22ms 16 May 2023 676th postie77 628 261 398ms 9 May 2023 677th hacker112 🇸🇪 627 207 14ms 22 Jun 2024 677th daniel-cardone 627 207 13ms 5 Jul 2025 679th Natanaelel 🇸🇪 627 255 3ms 15 Jun 2022 680th D-MOVE 🇵🇭 626 139 41ms 4 Feb 2026 681st bknower 626 257 43ms 29 Jun 2025 682nd AdrienHache 🇫🇷 626 262 389ms 25 Apr 2024 683rd Shanethegamer 🇺🇸 626 270 483ms 3 Mar 2022 684th sean-niemann 🇺🇸 625 213 68ms 3 Jun 2022 684th Alex-x90 🇺🇸 625 213 496ms 11 Jul 2023 686th strattonwhisler 624 208 13ms 29 Jun 2023 687th Natanaelel 🇸🇪 624 317 159ms 5 Dec 2025 688th evanrittner 623 258 22ms 28 Dec 2021 688th elephantpanda 623 258 43ms 11 Aug 2022 690th CaedenHarper 🇨🇦 621 140 44ms 7 Sep 2025 691st ShiraJoseph 🇺🇸 621 209 12ms 12 Feb 2023 691st 52525rr 621 209 17ms 25 Feb 2026 693rd jmerle 🇳🇱 621 210 670ms 19 Jun 2023 694th tdashroy 621 264 464ms 21 Nov 2021 695th lynn 619 135 36ms 12 Apr 2021 696th Anonymousellama21 618 98 57ms 12 Apr 2024 697th nomennescio 618 169 2ms 9 Dec 2024 698th retrohun 618 191 40ms 25 days ago 699th Kibble 618 210 15ms 11 Jul 2020 700th Starwort 🇬🇧 618 260 60ms 28 May 2019 700th cubed-guy 618 260 30ms 2 Oct 2021 702nd targrik 618 319 324ms 28 Jul 2025 703rd Pimentero 🇷🇺 617 178 7ms 9 Nov 2022 704th kirjavascript 617 383 173ms 12 Oct 2025 705th Natanaelel 🇸🇪 615 78 136ms 18 Feb 2025 706th inventshah 614 217 484ms 2 Apr 2025 707th jtaxen 614 262 425ms 8 May 2024 708th perlebach 🇨🇿 613 127 6ms 16 Aug 2021 709th Ripick 613 266 391ms 27 May 2025 710th TheZwierzLF 🇵🇱 612 142 35ms 27 Dec 2025 711th MeWhenI 🇻🇦 612 205 165ms 3 Aug 2024 712th thisishowmymindworks 🇳🇴 612 212 32ms 14 Oct 2020 713th Babafaba 612 231 532ms 17 Nov 2025 714th betaveros 611 263 358ms 2 Jan 2023 714th StefanHabel 🇨🇦 611 263 17ms 5 days ago 716th AZTECCO 610 171 2ms 21 Sep 2025 716th iczelia 🇩🇪 610 171 2ms 26 Sep 2025 718th emgordon154 610 191 1,319ms 2 Feb 2026 719th aliakseikalosha 610 269 381ms 21 Nov 2021 719th janbehrens 🇩🇪 610 269 420ms 17 Apr 2025 First Prev 641–720 of 1,458 Next Last