The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 31 hours. Why not try and solve them ahead of time?
φ 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 319th Babafaba 919 39 2,112ms 23 Nov 2025 322nd SirBogman 🇺🇸 917 29 1,763ms 26 Oct 2021 323rd andersk 🇺🇸 917 33 54ms 4 Mar 2023 323rd Natanaelel 🇸🇪 917 33 55ms 4 Aug 2023 323rd scpchicken 🇵🇼 917 33 53ms 4 Jul 2024 323rd CaedenHarper 🇨🇦 917 33 54ms 10 Aug 2025 327th GrayJoKing 🇦🇺 917 37 249ms 14 Dec 2020 327th nwellnhof 🇩🇪 917 37 49ms 18 Oct 2021 327th stefangimmillaro 917 37 747ms 27 Dec 2024 327th ovs-code 🇩🇪 917 37 447ms 27 Dec 2024 327th primo-ppcg 🇹🇭 917 37 226ms 6 Jan 2025 332nd ovs-code 🇩🇪 917 58 1,622ms 13 Jun 2025 333rd primo-ppcg 🇹🇭 917 117 92ms 17 Jan 2026 334th Lydxn 🇨🇦 915 51 180ms 9 Jan 2022 334th sean-niemann 🇺🇸 915 51 181ms 25 Mar 2025 336th stefangimmillaro 914 58 1,329ms 14 Oct 2025 337th JayXon 🇺🇸 914 99 457ms 21 Nov 2021 337th primo-ppcg 🇹🇭 914 99 442ms 21 Nov 2021 337th btnlq 914 99 467ms 3 Mar 2023 337th fuzzylojik-golf 🇺🇸 914 99 475ms 16 Jul 2025 337th AdrienHache 🇫🇷 914 99 444ms 25 Nov 2025 342nd pardouin 🇫🇷 912 51 178ms 28 Feb 2025 343rd canissimia 🇦🇶 912 249 243ms 9 Feb 2024 344th Lydxn 🇨🇦 911 78 140ms 2 Mar 2023 345th SirBogman 🇺🇸 910 55 500ms 16 Jan 2024 345th duckyluuk 🇳🇱 910 55 444ms 26 Mar 2024 345th MeWhenI 🇻🇦 910 55 56ms 25 Apr 2024 345th albanian-laundromat 910 55 438ms 8 Sep 2025 345th snoozingnewt 🇨🇦 910 55 432ms 25 days ago 350th JayXon 🇺🇸 909 81 571ms 12 Mar 2022 350th ovs-code 🇩🇪 909 81 578ms 16 Jun 2024 352nd JayXon 🇺🇸 909 87 255ms 26 Sep 2023 353rd prplz 🇦🇺 907 53 30ms 25 Oct 2019 353rd tomtheisen 🇺🇸 907 53 30ms 30 Sep 2020 353rd nwellnhof 🇩🇪 907 53 25ms 31 Oct 2021 353rd trinityy-7 907 53 33ms 1 Feb 2024 353rd targrik 907 53 29ms 18 Feb 2025 353rd Ultra814 907 53 31ms 26 Aug 2025 359th Constructor7 907 57 27ms 23 Feb 2018 359th btjones0 907 57 10ms 6 Dec 2021 359th emgordon154 907 57 27ms 21 Dec 2021 359th programjames 907 57 54ms 6 May 2022 359th RDShah 907 57 41ms 8 May 2022 359th nullie 907 57 10ms 18 Jun 2022 359th LogicalJoe 907 57 10ms 6 Sep 2022 359th jakobkordez 🇸🇮 907 57 10ms 21 Nov 2022 359th fkantelberg 907 57 39ms 6 Aug 2023 359th RYNO8 907 57 75ms 22 Aug 2023 359th jacobly0 🇺🇸 907 57 10ms 1 Sep 2023 359th wuzekai518 907 57 28ms 12 Jun 2024 359th jatloe 907 57 78ms 27 Sep 2024 359th lifthrasiir 🇰🇷 907 57 11ms 3 Dec 2024 359th agreegious 907 57 84ms 16 Mar 2025 359th Mr-McChicken 907 57 33ms 4 Oct 2025 359th solisolu 907 57 16ms 18 Nov 2025 359th plcc0 907 57 23ms 13 Jan 2026 377th andersk 🇺🇸 907 63 121ms 21 Mar 2020 377th JayXon 🇺🇸 907 63 126ms 28 Nov 2021 377th Natanaelel 🇸🇪 907 63 127ms 23 Apr 2025 380th primo-ppcg 🇹🇭 907 114 6ms 21 Sep 2021 380th DialFrost 🇸🇬 907 114 6ms 25 Nov 2024 380th sean-niemann 🇺🇸 907 114 6ms 9 Jan 2025 383rd inventshah 907 116 1,196ms 23 Jul 2024 384th lynn 906 65 1,298ms 30 Nov 2021 385th primo-ppcg 🇹🇭 906 158 140ms 5 Apr 2025 386th GrayJoKing 🇦🇺 905 60 137ms 29 May 2022 386th Steffan153 🇫🇮 905 60 204ms 29 Aug 2024 388th sean-niemann 🇺🇸 905 100 472ms 7 Aug 2023 388th ovs-code 🇩🇪 905 100 462ms 27 Aug 2024 390th dvargas46 🇺🇸 903 106 2,041ms 18 Mar 2023 391st sean-niemann 🇺🇸 901 92 282ms 25 Jun 2025 392nd GrayJoKing 🇦🇺 900 42 95ms 15 Sep 2023 392nd GrayJoKing 🇦🇺 900 42 3ms 5 Oct 2023 394th sean-niemann 🇺🇸 900 148 317ms 30 Dec 2024 395th JayXon 🇺🇸 899 79 132ms 16 Oct 2022 395th Steffan153 🇫🇮 899 79 138ms 10 Apr 2023 395th sean-niemann 🇺🇸 899 79 135ms 23 Mar 2025 398th SirBogman 🇺🇸 899 115 5ms 25 May 2023 398th Steffan153 🇫🇮 899 115 6ms 2 Feb 2024 400th primo-ppcg 🇹🇭 898 113 44ms 26 Apr 2025 First Prev 321–400 of 2,518 Next Last