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?
Emirp Numbers in Python 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 401st ozewski 470 117 10ms 2 May 2019 401st rgskinnerhpe 470 117 20ms 12 Jun 2019 401st bdendekk 470 117 11ms 10 Jul 2019 401st andre-lameirinhas 🇵🇹 470 117 50ms 1 Aug 2020 401st Andre3582 470 117 30ms 4 Nov 2020 401st Miles-1000 🇬🇧 470 117 37ms 28 Feb 2021 401st ludwig-n 470 117 26ms 6 Apr 2021 401st olavaga 470 117 14ms 13 Aug 2021 401st Kasci 470 117 67ms 28 Dec 2021 401st felixcroc 470 117 14ms 25 Apr 2022 401st georgehulme 470 117 27ms 12 Oct 2022 401st galloj 🇨🇿 470 117 25ms 6 Nov 2022 401st aalec 470 117 14ms 24 Apr 2024 401st CutSandstone 470 117 13ms 4 Jul 2024 401st WillowWispy 470 117 35ms 25 May 2025 416th toombs-caeman 466 118 13ms 8 Mar 2020 416th TechnoJo4 466 118 12ms 15 Sep 2021 416th BrenSchaap 466 118 13ms 21 Oct 2021 416th markus-rekdal 466 118 12ms 10 May 2022 416th celiendonze 🇨🇭 466 118 45ms 24 Apr 2023 416th midnattssol 🇸🇪 466 118 15ms 27 Jul 2023 416th cykim8811 466 118 58ms 11 Jul 2024 416th sjrct 466 118 47ms 5 Aug 2024 416th kitotch 466 118 49ms 10 days ago 425th thibthibaut 462 119 11ms 26 Feb 2018 425th Mojken 462 119 28ms 26 Aug 2018 425th PrettyWood 462 119 29ms 8 Dec 2018 425th DarkTemplar5 462 119 96ms 19 Feb 2020 425th geofft 462 119 18ms 10 Dec 2020 425th jacksonhenry3 462 119 40ms 23 Dec 2021 425th ellieoverwood 462 119 16ms 28 Feb 2022 425th Ailko 🇧🇪 462 119 29ms 5 May 2022 425th rowboat1 462 119 28ms 22 Jun 2022 425th 4ndyJ 🇬🇧 462 119 28ms 6 Mar 2023 425th Fracture17 462 119 15ms 8 Apr 2023 436th AlanLynn 458 120 31ms 28 Feb 2018 436th adesanjo 458 120 14ms 8 Jun 2019 436th AforAmpere 458 120 15ms 6 Jun 2020 436th argusdusty 🇺🇸 458 120 16ms 26 Dec 2020 436th estomagordo 🇳🇱 458 120 11ms 10 Dec 2021 436th jhpaques 🇫🇷 458 120 28ms 27 Jul 2022 436th croc54 458 120 12ms 30 Dec 2024 443rd haraldsperre 455 121 27ms 13 Feb 2018 443rd SimonPeatman 455 121 39ms 3 Feb 2019 443rd doug-h 455 121 48ms 29 May 2020 443rd luftj 455 121 25ms 8 Jul 2020 443rd scottwday 🇨🇦 455 121 16ms 15 Dec 2021 443rd OppositeShark 455 121 211ms 7 Apr 2022 443rd mdnestor 455 121 29ms 23 Dec 2022 443rd cuboids 455 121 13ms 10 Jul 2024 451st ThomasTram 451 122 54ms 28 Feb 2018 451st Threadzless 451 122 34ms 29 Oct 2018 451st ovravna 451 122 11ms 16 Dec 2018 451st TrAyZeN 451 122 15ms 23 Aug 2019 451st cbondurant 451 122 11ms 30 Sep 2021 451st karhuthebear 451 122 13ms 9 May 2022 451st Jaydosu 451 122 18ms 8 Jun 2022 451st TralfamadorianComedian 451 122 29ms 31 Dec 2024 451st ToE42 451 122 29ms 28 May 2025 451st clayboll99 451 122 40ms 14 Jul 2025 461st caerbannogwhite 447 123 30ms 13 Apr 2018 461st CRHillman 447 123 15ms 8 Aug 2018 461st fepe55 447 123 15ms 8 Oct 2018 461st rzhade3 447 123 30ms 1 Jul 2021 461st mhenion8293 🇺🇸 447 123 14ms 19 Jan 2022 461st j-Ewan 447 123 14ms 22 Mar 2022 461st Edjyzod 447 123 13ms 7 Mar 2023 461st rsgray 447 123 21ms 19 Feb 2024 461st Anonymousellama21 447 123 10ms 14 Mar 2024 461st Andrey135296 447 123 29ms 20 Sep 2024 461st Schreipfelerer 447 123 15ms 26 Sep 2024 461st AstroOrbis 447 123 19ms 16 Feb 2026 473rd aconkli4 444 124 25ms 2 Mar 2019 473rd nkansal96 444 124 16ms 21 May 2019 473rd dahrens 444 124 31ms 4 Jul 2019 473rd ian-h-chamberlain 🇺🇸 444 124 16ms 27 Dec 2019 473rd asadullayev 444 124 52ms 9 Jan 2021 473rd richard-oelze 🇩🇪 444 124 39ms 13 Feb 2021 473rd redbeancola 444 124 38ms 11 Oct 2021 473rd Stockoh 🇫🇷 444 124 12ms 21 Dec 2021 First Prev 401–480 of 813 Next Last
