The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Emirp Numbers in all languages in chars. 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 Chars Time Submitted 293rd betaveros 886 61 10ms 9 Aug 2022 293rd Steffan153 🇫🇮 886 61 12ms 25 Oct 2022 293rd Alex-x90 🇺🇸 886 61 9ms 16 Nov 2022 293rd thehylian 886 61 9ms 29 Dec 2022 293rd bob-th 886 61 10ms 2 Jan 2023 293rd neel11235813 886 61 48ms 16 Jan 2023 293rd DialFrost 🇸🇬 886 61 10ms 5 Feb 2023 293rd emirps 886 61 9ms 7 Feb 2023 293rd CatsAreFluffy 886 61 10ms 8 Feb 2023 293rd Shanethegamer 🇺🇸 886 61 10ms 21 Feb 2023 293rd Just4FunCoder 886 61 9ms 22 Mar 2023 293rd janbehrens 🇩🇪 886 61 9ms 20 Jun 2023 293rd stefangimmillaro 886 61 9ms 22 Aug 2023 293rd ndren 886 61 9ms 26 Aug 2023 293rd CornerMercury 🇬🇧 886 61 9ms 28 Sep 2023 293rd Yewzir 🇧🇪 886 61 10ms 21 Oct 2023 293rd duckyluuk 🇳🇱 886 61 10ms 20 Feb 2024 293rd Grrisly 886 61 9ms 25 Mar 2024 293rd abc7-12 886 61 9ms 10 May 2024 293rd CaedenHarper 🇨🇦 886 61 9ms 21 Aug 2024 293rd b-illy 🇬🇧 886 61 9ms 23 Aug 2024 293rd 5quiwyrm 886 61 9ms 14 Nov 2024 293rd bltnppcnt 886 61 9ms 19 Dec 2024 293rd plcc0 886 61 9ms 20 Feb 2025 293rd emgordon154 886 61 10ms 10 Apr 2025 293rd fuzzylojik-golf 🇺🇸 886 61 10ms 9 Jun 2025 293rd dirckvdende 886 61 9ms 24 Jul 2025 293rd albanian-laundromat 886 61 9ms 17 Nov 2025 293rd FortuiteMan 🇫🇷 886 61 10ms 19 Nov 2025 293rd ryyyn 🇺🇸 886 61 10ms 30 Dec 2025 293rd SectorCorruptor 886 61 9ms 8 Feb 2026 293rd Matter1024 🇮🇳 886 61 10ms 115 mins ago 353rd MeWhenI 🇻🇦 884 38 2ms 24 Jul 2021 354th Steffan153 🇫🇮 884 73 2ms 11 Feb 2026 355th MeWhenI 🇻🇦 884 92 38ms 16 May 2023 356th Lydxn 🇨🇦 882 62 2ms 13 May 2023 357th msbranicky 882 106 294ms 8 Sep 2023 357th kkoenig 882 106 302ms 5 Jan 2024 359th marcin7Cd 882 177 10ms 12 Oct 2020 359th Attero 🇸🇪 882 177 9ms 12 Oct 2020 359th sisyphus-ppcg 🇦🇺 882 177 10ms 30 May 2021 359th SirBogman 🇺🇸 882 177 9ms 28 Nov 2021 359th scpchicken 🇵🇼 882 177 10ms 22 Dec 2021 359th SpareManiKatti 882 177 9ms 19 Apr 2022 359th ovs-code 🇩🇪 882 177 9ms 22 Apr 2022 366th GrayJoKing 🇦🇺 880 95 6ms 24 Feb 2026 366th edsrzf 🇳🇿 880 95 6ms 16 days ago 368th Shanethegamer 🇺🇸 879 57 408ms 16 Jan 2024 369th dan-simon 878 42 103ms 28 Dec 2017 369th m-dango 878 42 95ms 2 Jul 2018 369th scpchicken 🇵🇼 878 42 125ms 7 Mar 2022 369th SirFireball3521 878 42 111ms 3 Mar 2023 369th sean-niemann 🇺🇸 878 42 120ms 14 Jan 2025 374th error256 877 163 1,411ms 19 Jan 2025 374th emgordon154 877 163 1,425ms 31 Mar 2025 376th KatieLG-Transpiler 🇬🇧 877 178 10ms 24 Jun 2022 377th emplv 🇱🇻 876 60 150ms 30 Oct 2024 378th somebody1234 872 62 9ms 8 Dec 2018 378th Irratix 🇳🇱 872 62 10ms 7 May 2022 378th QuincyNash 🇺🇸 872 62 11ms 29 Nov 2022 378th suwat513 872 62 9ms 13 Dec 2022 378th m42km 872 62 9ms 6 Nov 2023 378th dokutan 872 62 9ms 22 Jan 2024 378th namelessiw 872 62 9ms 5 Mar 2024 378th codingisgreatbutiamnot 872 62 9ms 7 Aug 2024 378th lifthrasiir 🇰🇷 872 62 9ms 21 Nov 2024 378th snoozingnewt 🇨🇦 872 62 9ms 28 Nov 2025 378th JOrE20 872 62 9ms 25 Feb 2026 389th Waffle3z 872 74 2ms 28 Oct 2020 389th dokutan 872 74 1ms 11 Apr 2024 389th sean-niemann 🇺🇸 872 74 2ms 23 Dec 2025 392nd prplz 🇦🇺 870 76 108ms 18 Nov 2020 393rd kg583 🇺🇸 870 138 83ms 2 days ago 394th sean-niemann 🇺🇸 868 63 2ms 24 Jul 2023 395th stefangimmillaro 867 46 34ms 22 Aug 2023 396th JayXon 🇺🇸 867 67 2ms 11 Sep 2022 397th Natanaelel 🇸🇪 865 33 32ms 1 Mar 2025 398th edsrzf 🇳🇿 865 105 28ms 13 Feb 2026 399th GolfingSuccess 🇬🇷 864 58 434ms 8 Nov 2025 400th saito-ta 🇯🇵 863 34 44ms 30 Aug 2022 First Prev 321–400 of 3,185 Next Last
