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 552nd Aquateraneal 🇺🇸 414 133 13ms 20 Feb 2026 562nd PossessedLego 410 134 171ms 12 May 2019 562nd derekthatcher 410 134 19ms 22 Sep 2020 562nd wrhm 410 134 30ms 13 Dec 2020 562nd sbr075 410 134 21ms 7 Dec 2021 562nd tails618 410 134 11ms 6 Dec 2022 567th sirrus233 407 135 13ms 7 Dec 2017 567th zuparnowa 407 135 19ms 23 Apr 2019 567th oriphi 407 135 34ms 16 Jun 2019 567th henrytranter 407 135 18ms 20 Sep 2019 567th ethandhunt 407 135 27ms 20 Jul 2021 567th amollberg 🇸🇪 407 135 15ms 4 Jan 2022 567th vodker1 407 135 23ms 9 Mar 2022 567th sleepyStick 407 135 30ms 11 Mar 2022 567th aeonsablaze 407 135 20ms 22 Nov 2022 567th brimstonetrader 407 135 22ms 26 Dec 2023 567th tknight00 407 135 13ms 25 Jan 2024 567th HanaEndUser 407 135 12ms 25 Jan 2024 579th bretthat0 404 136 14ms 11 Nov 2017 579th yevbar 404 136 13ms 8 Apr 2018 579th coloredferrets 404 136 9ms 1 Aug 2019 579th Foxinatel 404 136 45ms 24 Jul 2021 579th Techdude01 404 136 21ms 27 Jan 2023 579th VV1Git 404 136 14ms 27 Mar 2023 585th wilkij1 401 137 85ms 17 Jun 2018 585th qrico64 401 137 31ms 2 Feb 2021 585th akshatj27 🇦🇶 401 137 12ms 11 Jan 2022 585th EthanGrant1 401 137 21ms 14 Apr 2022 585th borosilicate 401 137 70ms 9 May 2022 585th LukasFolwarczny 🇨🇿 401 137 11ms 16 Sep 2022 585th eiburns 401 137 14ms 25 Oct 2023 585th kbeat 🇰🇿 401 137 21ms 21 May 2025 593rd ValNyz 399 138 20ms 20 Apr 2018 593rd Pierre-Loic 399 138 19ms 23 Jun 2018 593rd ionutm82 399 138 14ms 18 Dec 2018 593rd usnheckler 399 138 1,062ms 8 Jun 2019 593rd GodEmperorCaterpie 399 138 20ms 6 Sep 2019 593rd orifu 399 138 29ms 25 Jun 2021 593rd shibacho 🇯🇵 399 138 12ms 1 Nov 2022 593rd Azearia 399 138 10ms 22 Jun 2023 593rd Ty-Cyr 399 138 26ms 13 Jul 2023 602nd sevinon 396 139 31ms 9 Nov 2019 602nd hjcafaroUC 396 139 43ms 29 Jul 2020 602nd Higashida-Daisuke 396 139 9ms 21 Dec 2021 605th mkillianey 393 140 11ms 13 Oct 2018 605th qoqosz 393 140 62ms 16 Jun 2019 605th dranjohn 393 140 9ms 10 Oct 2023 605th brochmann 🇸🇪 393 140 20ms 28 Oct 2023 605th 0dyse 393 140 20ms 23 Apr 2025 610th smeans 390 141 14ms 11 Jun 2021 610th b4dpxl 390 141 13ms 10 Nov 2021 610th neonchickens 390 141 18ms 27 Oct 2023 610th GeneralFabian 390 141 12ms 14 Dec 2024 614th lukasmki 385 143 21ms 23 Jan 2019 614th thiccaxe 385 143 13ms 9 Dec 2022 614th figyel0002 385 143 10ms 7 Jan 2024 614th alabhyajindal 385 143 12ms 24 Apr 2025 614th smilesformiles3 385 143 15ms 24 Sep 2025 614th TJK-S 385 143 22ms 10 Oct 2025 620th 1231234md5 🇨🇳 382 144 12ms 11 Dec 2023 620th XavierRex 382 144 10ms 23 Sep 2024 622nd Deviluc 379 145 13ms 5 Jan 2018 622nd wazawoo 379 145 14ms 22 Oct 2018 622nd Solar-Flare 379 145 14ms 9 Nov 2018 622nd raywinray 379 145 121ms 16 Nov 2018 622nd Ludusamo 379 145 17ms 2 Aug 2019 622nd CuboidRaptor 🇨🇦 379 145 27ms 3 Apr 2022 622nd twocatsinatrenchcoat 379 145 42ms 12 May 2022 629th naveenarun 377 146 21ms 6 Jun 2019 629th DaCuteRaccoon 377 146 13ms 30 Dec 2022 629th DGipe 377 146 12ms 28 Jun 2024 629th SpiderScripts 377 146 12ms 23 Sep 2024 629th JesseNoEyes 🇺🇸 377 146 29ms 28 Sep 2024 634th Deepztream 374 147 31ms 2 Sep 2018 634th oAsAo 374 147 13ms 20 Jan 2020 634th jaxmattfair 🇺🇸 374 147 21ms 13 Jan 2023 634th Skwerl23 374 147 21ms 5 Feb 2023 634th HenryFoss-10 374 147 13ms 1 May 2024 634th julian-hoelz 374 147 15ms 21 Sep 2024 634th jusaka 374 147 17ms 8 days ago First Prev 561–640 of 813 Next Last
