The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Divisors 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 513th SectorCorruptor 857 63 10ms 10 Feb 2026 513th netfri25 🇮🇱 857 63 10ms 17 Feb 2026 513th denkyuu1 857 63 11ms 27 days ago 513th jusaka 857 63 10ms 6 days ago 645th Threadzless 844 64 11ms 29 Oct 2018 645th Sakrette 844 64 10ms 31 Dec 2018 645th EmadAIsmael 844 64 10ms 15 Jan 2019 645th lmishra92 844 64 10ms 15 Jan 2019 645th mavrick08 844 64 9ms 3 Apr 2019 645th bernardgardner 844 64 10ms 13 Jun 2019 645th sibivel 844 64 10ms 26 Jun 2019 645th TessSSBM 844 64 12ms 1 Oct 2019 645th Anders429 844 64 13ms 8 Oct 2019 645th sjao14 844 64 10ms 4 Nov 2019 645th toombs-caeman 844 64 11ms 8 Mar 2020 645th mortimervonchappuis 844 64 10ms 16 Mar 2020 645th vonKrafft 844 64 12ms 25 Mar 2020 645th jimbarrett27 844 64 10ms 13 May 2020 645th drbalan 844 64 10ms 20 Jul 2020 645th Psirving 844 64 10ms 21 Jul 2020 645th QuinnQR 844 64 11ms 18 Aug 2020 645th mamsterla 844 64 10ms 19 Aug 2020 645th PatrickStephansen 🇿🇦 844 64 11ms 31 Aug 2020 645th ihalseide 🇺🇸 844 64 10ms 28 Oct 2020 645th Miles-1000 🇬🇧 844 64 10ms 28 Feb 2021 645th NanduBC 844 64 10ms 17 Mar 2021 645th jhunterkohler 844 64 11ms 20 May 2021 645th oplxy 844 64 10ms 20 Jun 2021 645th iammanish17 844 64 11ms 29 Jun 2021 645th sambirnbaum1 844 64 15ms 23 Aug 2021 645th feherd 844 64 10ms 29 Aug 2021 645th Jaydosu 844 64 10ms 21 Oct 2021 645th RagePit 844 64 11ms 2 Dec 2021 645th jacksonhenry3 844 64 11ms 23 Dec 2021 645th pascscha 844 64 13ms 28 Mar 2022 645th MichaelMBradley 🇨🇦 844 64 10ms 10 Apr 2022 645th trag1c 🇵🇱 844 64 10ms 12 Apr 2022 645th Romain-1 🇫🇷 844 64 11ms 28 Apr 2022 645th cooljoseph1 844 64 14ms 7 May 2022 645th karhuthebear 844 64 10ms 10 May 2022 645th tterem 844 64 13ms 8 Jun 2022 645th Qu1etboy 844 64 11ms 23 Jun 2022 645th AbelPelser 844 64 11ms 3 Jul 2022 645th smartiel 844 64 15ms 13 Sep 2022 645th LukasFolwarczny 🇨🇿 844 64 14ms 16 Sep 2022 645th ImpressedByRocks 844 64 10ms 16 Sep 2022 645th ls-samer-abuthaher 844 64 12ms 7 Oct 2022 645th AZ9tumas 844 64 11ms 11 Oct 2022 645th nkoppel 844 64 10ms 20 Oct 2022 645th aeonsablaze 844 64 10ms 22 Nov 2022 645th UltimateGuy0987 844 64 11ms 18 Dec 2022 645th Alfiecxn 🇬🇧 844 64 10ms 18 Dec 2022 645th vrnprkh 844 64 10ms 3 Mar 2023 645th Edjyzod 844 64 10ms 7 Mar 2023 645th gregoirebezier 844 64 10ms 26 Apr 2023 645th LiquidPulsar 844 64 11ms 19 Jul 2023 645th tails618 844 64 10ms 21 Aug 2023 645th dranjohn 844 64 10ms 20 Sep 2023 645th vTrial 844 64 10ms 16 Dec 2023 645th Pale-Vessel 844 64 11ms 19 Dec 2023 645th JakeDaCake36 844 64 11ms 19 Feb 2024 645th sciencejiho 844 64 10ms 10 Apr 2024 645th thienudomsrirungruang 844 64 11ms 11 Apr 2024 645th HumanoidCPU 844 64 11ms 3 May 2024 645th OCNeve 844 64 10ms 17 Jun 2024 645th mrinalTheCoder 844 64 13ms 5 Jul 2024 645th MaxCastella 🇫🇷 844 64 10ms 9 Jul 2024 645th jameswmccarty 844 64 10ms 10 Jul 2024 645th aaa123git 844 64 10ms 17 Jul 2024 645th WillConker 844 64 10ms 11 Aug 2024 645th Mathrew2012 844 64 9ms 14 Aug 2024 645th JesseNoEyes 🇺🇸 844 64 10ms 4 Oct 2024 645th shogo314 844 64 11ms 24 Oct 2024 645th gallium-gonzollium 844 64 10ms 2 Nov 2024 645th itljan30 844 64 11ms 28 Jan 2025 645th gdpr777 844 64 11ms 19 Apr 2025 645th BabySharkHi 844 64 11ms 22 Apr 2025 645th benvreeves 844 64 10ms 25 Jul 2025 645th osNiko 🇧🇷 844 64 10ms 28 Jul 2025 645th countlpaul-dotcom 844 64 10ms 19 Oct 2025 First Prev 641–720 of 1,506 Next Last
