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 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 397th celiendonze 🇨🇭 568 118 45ms 24 Apr 2023 397th midnattssol 🇸🇪 568 118 15ms 27 Jul 2023 397th cykim8811 568 118 58ms 11 Jul 2024 397th sjrct 568 118 47ms 5 Aug 2024 397th kitotch 568 118 49ms 10 days ago 406th thibthibaut 563 119 11ms 26 Feb 2018 406th Mojken 563 119 28ms 26 Aug 2018 406th PrettyWood 563 119 29ms 8 Dec 2018 406th tburette 563 119 10ms 26 Dec 2018 406th DarkTemplar5 563 119 96ms 19 Feb 2020 406th geofft 563 119 18ms 10 Dec 2020 406th jacksonhenry3 563 119 40ms 23 Dec 2021 406th ellieoverwood 563 119 16ms 28 Feb 2022 406th Ailko 🇧🇪 563 119 29ms 5 May 2022 406th rowboat1 563 119 28ms 22 Jun 2022 406th 4ndyJ 🇬🇧 563 119 28ms 6 Mar 2023 406th Fracture17 563 119 15ms 8 Apr 2023 418th AlanLynn 558 120 31ms 28 Feb 2018 418th adesanjo 558 120 14ms 8 Jun 2019 418th AforAmpere 558 120 15ms 6 Jun 2020 418th argusdusty 🇺🇸 558 120 16ms 26 Dec 2020 418th estomagordo 🇳🇱 558 120 11ms 10 Dec 2021 418th shellbertt 🇨🇦 558 120 15ms 28 Apr 2022 418th jhpaques 🇫🇷 558 120 28ms 27 Jul 2022 418th croc54 558 120 12ms 30 Dec 2024 426th haraldsperre 554 121 27ms 13 Feb 2018 426th SimonPeatman 554 121 39ms 3 Feb 2019 426th doug-h 554 121 48ms 29 May 2020 426th luftj 554 121 25ms 8 Jul 2020 426th scottwday 🇨🇦 554 121 16ms 15 Dec 2021 426th OppositeShark 554 121 211ms 7 Apr 2022 426th mdnestor 554 121 29ms 23 Dec 2022 426th jsthope 554 121 19ms 9 Mar 2023 426th cuboids 554 121 13ms 10 Jul 2024 435th ThomasTram 549 122 54ms 28 Feb 2018 435th Threadzless 549 122 34ms 29 Oct 2018 435th ovravna 549 122 11ms 16 Dec 2018 435th TrAyZeN 549 122 15ms 23 Aug 2019 435th enbyte 549 122 13ms 27 May 2021 435th cbondurant 549 122 11ms 30 Sep 2021 435th karhuthebear 549 122 13ms 9 May 2022 435th Jaydosu 549 122 18ms 8 Jun 2022 435th TralfamadorianComedian 549 122 29ms 31 Dec 2024 435th ToE42 549 122 29ms 28 May 2025 435th clayboll99 549 122 40ms 14 Jul 2025 435th katss2 549 122 14ms 20 Aug 2025 447th caerbannogwhite 545 123 30ms 13 Apr 2018 447th CRHillman 545 123 15ms 8 Aug 2018 447th fepe55 545 123 15ms 8 Oct 2018 447th rzhade3 545 123 30ms 1 Jul 2021 447th mhenion8293 🇺🇸 545 123 14ms 19 Jan 2022 447th j-Ewan 545 123 14ms 22 Mar 2022 447th Edjyzod 545 123 13ms 7 Mar 2023 447th rsgray 545 123 21ms 19 Feb 2024 447th Anonymousellama21 545 123 10ms 14 Mar 2024 447th Andrey135296 545 123 29ms 20 Sep 2024 447th Schreipfelerer 545 123 15ms 26 Sep 2024 447th robin-scragg 545 123 10ms 25 Jul 2025 447th AstroOrbis 545 123 19ms 16 Feb 2026 460th aconkli4 540 124 25ms 2 Mar 2019 460th nkansal96 540 124 16ms 21 May 2019 460th dahrens 540 124 31ms 4 Jul 2019 460th ian-h-chamberlain 🇺🇸 540 124 16ms 27 Dec 2019 460th asadullayev 540 124 52ms 9 Jan 2021 460th richard-oelze 🇩🇪 540 124 39ms 13 Feb 2021 460th redbeancola 540 124 38ms 11 Oct 2021 460th Stockoh 🇫🇷 540 124 12ms 21 Dec 2021 460th Vaekor 540 124 41ms 28 Jul 2023 460th Alex-Huggett 🇬🇧 540 124 67ms 23 Oct 2024 470th leon-w 536 125 9ms 4 Jan 2019 470th qiman3 536 125 20ms 24 Jan 2019 470th decorator-factory 536 125 30ms 24 May 2019 470th n1LS 536 125 42ms 26 Sep 2019 470th scrappedsoda 536 125 10ms 31 Oct 2019 470th tomh1012 536 125 22ms 29 Oct 2020 470th ritwinnarra 536 125 18ms 11 Jun 2023 470th hamilton-bonds 536 125 12ms 24 Jul 2025 478th Bibi2424 532 126 35ms 13 May 2019 478th mothcolada 🇺🇸 532 126 73ms 25 Mar 2021 478th DuyTaDinh 532 126 12ms 24 Sep 2021 First Prev 401–480 of 813 Next Last
