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?
Leap Years 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 317th Y0UR-U5ERNAME 934 42 12ms 5 Sep 2021 317th nathanadams 🇳🇿 934 42 10ms 11 Sep 2021 317th sisyphus-ppcg 🇦🇺 934 42 14ms 10 Mar 2022 317th randolchance 934 42 12ms 20 Jan 2023 317th tayloia 🇬🇧 934 42 10ms 17 May 2023 317th Alex-x90 🇺🇸 934 42 9ms 11 Jul 2023 317th targrik 934 42 10ms 12 Feb 2025 317th luuumine 🇫🇷 934 42 10ms 29 Oct 2025 317th Lv0Sys 🇵🇱 934 42 10ms 2 Dec 2025 330th JayXon 🇺🇸 934 44 2,652ms 27 Oct 2024 330th Steffan153 🇫🇮 934 44 2,585ms 3 days ago 332nd DialFrost 🇸🇬 933 39 1,020ms 29 Aug 2025 332nd sean-niemann 🇺🇸 933 39 757ms 12 Sep 2025 332nd edsrzf 🇳🇿 933 39 1,528ms 14 Dec 2025 332nd Steffan153 🇫🇮 933 39 730ms 14 Feb 2026 332nd dokutan 933 39 701ms 21 Feb 2026 337th Lydxn 🇨🇦 933 52 116ms 14 Oct 2022 337th JayXon 🇺🇸 933 52 116ms 14 Oct 2022 337th Steffan153 🇫🇮 933 52 113ms 26 Dec 2022 337th sean-niemann 🇺🇸 933 52 112ms 17 Feb 2023 337th DialFrost 🇸🇬 933 52 134ms 8 Nov 2023 337th dokutan 933 52 122ms 25 Sep 2024 337th edsrzf 🇳🇿 933 52 112ms 21 Dec 2025 344th NewDefectus 🇮🇱 932 44 52ms 15 Oct 2021 344th AdrienHache 🇫🇷 932 44 52ms 31 Oct 2024 346th primo-ppcg 🇹🇭 931 48 36ms 13 Jun 2022 346th Lydxn 🇨🇦 931 48 36ms 13 Jun 2022 346th JayXon 🇺🇸 931 48 35ms 9 Sep 2022 349th kg583 🇺🇸 930 58 5ms 21 Aug 2025 350th DialFrost 🇸🇬 929 67 449ms 24 Sep 2025 350th sean-niemann 🇺🇸 929 67 472ms 24 Sep 2025 350th nwellnhof 🇩🇪 929 67 540ms 25 Sep 2025 350th namelessiw 929 67 455ms 4 Oct 2025 350th stefangimmillaro 929 67 440ms 6 Oct 2025 350th b-illy 🇬🇧 929 67 547ms 9 Oct 2025 350th MeWhenI 🇻🇦 929 67 479ms 7 Nov 2025 350th dokutan 929 67 484ms 30 Nov 2025 350th edsrzf 🇳🇿 929 67 424ms 21 Dec 2025 359th Lydxn 🇨🇦 928 43 393ms 16 Jan 2024 359th b-illy 🇬🇧 928 43 360ms 7 Sep 2024 359th fuzzylojik-golf 🇺🇸 928 43 382ms 2 Jul 2025 359th sean-niemann 🇺🇸 928 43 438ms 29 Dec 2025 363rd primo-ppcg 🇹🇭 928 44 483ms 2 May 2020 363rd lynn 928 44 470ms 10 Sep 2021 363rd Steffan153 🇫🇮 928 44 101ms 3 days ago 366th Lydxn 🇨🇦 928 52 3ms 30 Sep 2022 367th Attero 🇸🇪 928 61 374ms 21 Nov 2021 367th nwellnhof 🇩🇪 928 61 387ms 21 Nov 2021 367th sean-niemann 🇺🇸 928 61 372ms 21 Nov 2021 367th tomtheisen 🇺🇸 928 61 411ms 21 Nov 2021 367th MeWhenI 🇻🇦 928 61 356ms 10 Oct 2022 367th stefangimmillaro 928 61 390ms 4 Aug 2023 367th DialFrost 🇸🇬 928 61 420ms 8 Nov 2023 367th namelessiw 928 61 351ms 11 Jul 2024 367th dokutan 928 61 420ms 25 Sep 2024 367th pardouin 🇫🇷 928 61 394ms 26 Sep 2024 367th b-illy 🇬🇧 928 61 387ms 21 Jan 2025 367th fuzzylojik-golf 🇺🇸 928 61 432ms 28 Jun 2025 367th edsrzf 🇳🇿 928 61 397ms 21 Dec 2025 380th pardouin 🇫🇷 927 50 4ms 25 Apr 2025 380th Steffan153 🇫🇮 927 50 4ms 3 days ago 382nd MeWhenI 🇻🇦 926 42 5ms 20 Oct 2022 383rd Lydxn 🇨🇦 926 67 25ms 16 Apr 2022 383rd JayXon 🇺🇸 926 67 26ms 16 Feb 2026 385th inventshah 925 37 74ms 12 Dec 2022 385th DialFrost 🇸🇬 925 37 70ms 22 Oct 2023 387th Steffan153 🇫🇮 925 54 7ms 16 Feb 2026 387th kg583 🇺🇸 925 54 7ms 15 days ago 389th sean-niemann 🇺🇸 925 55 9ms 25 Mar 2025 390th m-tkach 🇺🇦 924 71 2ms 14 Jun 2025 391st janbehrens 🇩🇪 924 77 58ms 8 Jan 2022 391st solmyr2000 924 77 58ms 21 Jun 2022 391st annaproxy 924 77 60ms 7 Jan 2023 391st Alex-x90 🇺🇸 924 77 61ms 19 Feb 2023 391st roupiq 🇵🇱 924 77 59ms 17 Nov 2023 391st ovs-code 🇩🇪 924 77 55ms 3 Jun 2024 391st tailorspy 924 77 60ms 23 Sep 2024 391st luuumine 🇫🇷 924 77 69ms 16 Nov 2025 399th xsot 🇸🇬 923 48 5ms 13 Apr 2024 399th sean-niemann 🇺🇸 923 48 4ms 16 Jul 2024 First Prev 321–400 of 4,867 Next Last