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 481st jakobwitte 721 180 16ms 12 Mar 2018 481st rniii 721 180 13ms 21 Nov 2025 483rd pascscha 721 223 385ms 13 May 2022 483rd MaxElf999 721 223 63ms 23 Sep 2022 485th AlephSquirrel 721 235 112ms 26 Oct 2024 486th MostParsingVex 720 185 464ms 2 Jan 2025 487th albanian-laundromat 719 140 2,433ms 11 Nov 2025 488th KatieLG 🇬🇧 718 197 510ms 23 Aug 2024 489th ovs-code 🇩🇪 716 67 107ms 17 Jul 2024 490th mathisfun271 714 225 21ms 12 Feb 2024 490th edsrzf 🇳🇿 714 225 22ms 22 Jan 2025 490th itljan30 714 225 21ms 26 Jan 2025 490th YAJUE114514 714 225 23ms 21 days ago 494th edsrzf 🇳🇿 713 154 6ms 27 Oct 2024 495th SirFireball3521 713 182 19ms 23 Nov 2022 496th stackotter 712 337 157ms 29 May 2023 497th albanian-laundromat 711 199 543ms 21 Aug 2025 498th mossprescott 711 226 22ms 10 Jan 2023 499th tianshuo 709 183 17ms 19 Jun 2019 499th Maznek 709 183 13ms 6 Feb 2025 501st ovs-code 🇩🇪 709 188 478ms 8 Jun 2024 502nd imreallybadatnames 709 366 2,057ms 16 Mar 2025 503rd scpchicken 🇵🇼 708 125 2,963ms 8 Apr 2022 504th NickTheEASDude 🇺🇸 708 227 22ms 19 Dec 2023 505th TimCurwick 🇺🇸 707 147 379ms 6 May 2021 505th KevinMarquette 🇺🇸 707 147 448ms 27 Apr 2023 507th Salutations45 707 167 7ms 23 Jan 2025 508th jarekwg 705 228 23ms 26 Apr 2019 509th pschmid0 🇺🇸 704 156 5ms 31 Aug 2022 510th sean-niemann 🇺🇸 704 240 492ms 23 Jul 2024 511th Shanethegamer 🇺🇸 703 261 3,333ms 27 Oct 2024 512th KatieLG 🇬🇧 702 185 14ms 3 Jun 2024 513th Ripick 702 229 23ms 1 Feb 2023 514th Shanethegamer 🇺🇸 701 342 149ms 19 May 2023 515th splitlane 699 229 3ms 9 Mar 2023 516th biocommando 🇫🇮 698 186 25ms 27 May 2023 516th NickTheEASDude 🇺🇸 698 186 16ms 26 Jan 2024 518th HumanEquivalentUnit 697 149 821ms 7 Oct 2020 519th primo-ppcg 🇹🇭 697 158 2,136ms 8 Feb 2022 520th TeodorDyakov 🇧🇬 696 150 2ms 26 Feb 2025 521st dokutan 696 230 3ms 3 Apr 2024 522nd MeWhenI 🇻🇦 696 283 339ms 9 Feb 2023 523rd Yewzir 🇧🇪 696 373 1,851ms 21 May 2024 524th ovs-code 🇩🇪 695 245 230ms 8 Oct 2024 525th stefangimmillaro 695 275 41ms 14 Sep 2024 526th isaacg1 695 340 196ms 4 Jan 2020 527th pandapawskat 694 187 14ms 16 Sep 2021 528th fuzzylojik-golf 🇺🇸 693 204 538ms 31 May 2025 529th adriweb 🇫🇷 693 231 5ms 19 Aug 2023 530th SirBogman 🇺🇸 691 107 5ms 26 Aug 2024 531st 2bular 691 121 39ms 5 days ago 532nd snoozingnewt 🇨🇦 690 126 40ms 20 Oct 2025 533rd fitzdotlol 🇺🇸 690 188 14ms 28 Mar 2022 533rd wh3n3v3r 🇨🇿 690 188 15ms 8 Nov 2024 533rd iczelia 🇩🇪 690 188 14ms 22 Sep 2025 536th mobibluman 687 189 15ms 1 Mar 2022 536th edsrzf 🇳🇿 687 189 12ms 19 Nov 2024 538th snoozingnewt 🇨🇦 687 190 559ms 22 Nov 2025 539th H3XDaemon 687 194 65ms 19 Nov 2025 540th Indivicivet 687 234 312ms 23 Mar 2021 540th alexeldridge 687 234 21ms 12 Aug 2024 542nd frozolotl 687 344 148ms 10 Jan 2020 543rd Ultra814 683 190 16ms 13 days ago 544th jacobly0 🇺🇸 683 380 1,821ms 22 Apr 2024 545th Natanaelel 🇸🇪 682 114 6ms 14 Oct 2021 546th UpwardProcess 682 161 5ms 31 Dec 2018 547th primo-ppcg 🇹🇭 682 169 852ms 4 Apr 2019 548th Natanaelel 🇸🇪 681 130 1,471ms 14 Oct 2021 549th Sticky-Bits 681 236 22ms 26 Apr 2019 549th Code-Coder-coder 681 236 30ms 23 Nov 2025 551st billings7 🇬🇧 681 241 423ms 21 Nov 2021 552nd frankgraziano 680 324 16ms 22 Feb 2026 553rd lifthrasiir 🇰🇷 679 109 4ms 1 Dec 2024 554th jared-hughes 679 128 49ms 12 Sep 2022 554th 4hg 🇺🇸 679 128 39ms 11 Dec 2022 554th jstanley0 679 128 40ms 18 Jan 2024 557th RDShah 679 191 12ms 3 Feb 2020 557th dzshn 679 191 15ms 17 Aug 2022 559th janbehrens 🇩🇪 679 249 495ms 24 Apr 2023 560th jared-hughes 678 170 463ms 3 Aug 2022 First Prev 481–560 of 1,458 Next Last