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 561st ovs-code 🇩🇪 677 115 6ms 23 Jul 2024 562nd ndren 677 209 866ms 30 Jan 2024 563rd skps2010 676 192 12ms 2 Jan 2019 563rd daisy-lau 676 192 14ms 31 Jul 2020 563rd kellantech 676 192 14ms 9 Dec 2025 566th Shanethegamer 🇺🇸 676 323 174ms 27 Oct 2024 567th MeWhenI 🇻🇦 675 215 146ms 11 hours ago 568th Babafaba 675 238 22ms 17 Nov 2025 569th snoozingnewt 🇨🇦 674 366 118ms 19 days ago 570th jwhear 🇺🇸 674 385 1,831ms 30 Sep 2024 571st mathb0y512 673 239 461ms 20 Aug 2024 572nd leon-w 672 193 18ms 5 Jan 2020 572nd pfgithub 672 193 16ms 27 Oct 2020 572nd gussy420 672 193 13ms 29 Oct 2023 572nd dokutan 672 193 12ms 3 Aug 2024 576th jbyuki 672 238 3ms 28 Aug 2020 577th revlayle 🇺🇸 672 244 414ms 21 Nov 2021 578th mcreenan 671 116 6ms 6 Feb 2018 578th iczelia 🇩🇪 671 116 5ms 22 Sep 2025 580th commandz0 🇺🇸 670 211 490ms 1 Sep 2025 581st syntax-rules 670 253 64ms 4 May 2023 582nd tatzyr 🇯🇵 669 130 45ms 12 Feb 2025 583rd Shanethegamer 🇺🇸 669 217 181ms 24 May 2025 584th MichalMarsalek 🇨🇿 669 244 391ms 28 Nov 2021 585th Aurel300 🇨🇭 668 354 170ms 6 Jun 2024 586th FoxInTheClouds 667 241 21ms 18 Feb 2026 587th IISResetMe 666 156 1,848ms 14 Jan 2026 588th bluebear94 666 195 15ms 4 Feb 2018 588th wansacis 🇩🇪 666 195 13ms 23 Jul 2021 588th smclaughlin-cf 666 195 12ms 11 Jun 2025 591st plcc0 664 131 39ms 10 Oct 2025 591st Lv0Sys 🇵🇱 664 131 40ms 30 Nov 2025 591st darrenks 🇺🇸 664 131 51ms 25 Feb 2026 594th nking07049925 662 196 13ms 2 Jun 2024 594th unfinishedprogram 662 196 12ms 20 Sep 2024 594th alexsave 662 196 14ms 5 Nov 2025 597th btjones0 662 243 28ms 8 Jan 2021 597th guilhem-roy 🇫🇷 662 243 332ms 27 Jul 2023 599th perlebach 🇨🇿 662 277 3,202ms 7 Jun 2025 600th The3gs 662 357 163ms 28 Nov 2024 601st JDiLenarda 🇫🇷 662 377 1,367ms 28 Oct 2020 602nd KasperKivimaeki 🇫🇮 661 248 455ms 10 Apr 2025 603rd timvermeulen 660 358 179ms 4 Jan 2020 604th Andriamanitra 🇫🇮 659 132 37ms 9 Oct 2023 605th ForkKILLET 🇨🇳 659 197 1,109ms 29 Jul 2021 605th owen-c-parker 🇺🇸 659 197 16ms 4 Apr 2023 607th duckyluuk 🇳🇱 659 235 101ms 13 Nov 2025 608th fgrosshans 🇫🇷 659 244 23ms 18 Jul 2022 609th voytasify 🇵🇱 659 249 398ms 21 Nov 2021 610th MeWhenI 🇻🇦 658 219 26ms 28 Jul 2023 610th typeswitch-dev 🇵🇹 658 219 5ms 2 Aug 2023 612th MeWhenI 🇻🇦 657 235 40ms 26 Aug 2023 613th rucin93 🇵🇱 657 309 179ms 10 Jul 2025 614th Eolu 657 360 173ms 8 Apr 2021 614th luuumine 🇫🇷 657 360 172ms 9 Dec 2025 616th Slonser 656 203 510ms 26 Jan 2026 617th za3k 656 245 22ms 12 Oct 2022 617th willdaspit 656 245 22ms 5 Aug 2023 619th lowlighter 655 198 14ms 1 Nov 2020 620th olivermrose 🇺🇸 654 133 39ms 10 Oct 2021 620th olleicua 🇺🇸 654 133 37ms 20 Jan 2024 622nd SirBogman 🇺🇸 653 128 36ms 26 Apr 2022 623rd CedricGebistorf 653 246 20ms 5 Mar 2022 623rd dirckvdende 653 246 22ms 12 Jul 2025 625th b97tsk 653 302 349ms 23 Apr 2020 626th eranws 652 199 20ms 17 Oct 2022 627th dokutan 652 231 7ms 5 Sep 2024 628th BlankSpruce 651 247 15ms 9 Sep 2022 629th Mandrzejy 🇵🇱 650 205 450ms 17 Mar 2025 630th KatieLG 🇬🇧 649 134 38ms 26 Dec 2023 631st MeWhenI 🇻🇦 648 295 40ms 17 May 2023 632nd 386asm 🇺🇸 646 239 48ms 4 May 2023 633rd msrawson 646 249 21ms 4 Sep 2018 634th ovs-code 🇩🇪 644 162 2ms 19 Mar 2024 634th MostParsingVex 644 162 3ms 2 Jan 2025 636th MeWhenI 🇻🇦 644 256 34ms 13 Dec 2023 637th Xzyaihni 644 367 224ms 15 Jan 2024 638th asheeri 643 250 31ms 15 Aug 2021 638th kmaork 🇮🇱 643 250 176ms 17 Aug 2023 638th alfonsoalves 643 250 21ms 21 Jul 2024 First Prev 561–640 of 1,458 Next Last