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 318th SupImDos 593 113 64ms 6 Nov 2020 318th hiddicop 🇸🇪 593 113 24ms 25 Jan 2021 318th tnecio 593 113 23ms 29 Apr 2021 318th clementblaudeau 593 113 13ms 28 May 2021 318th AbelPelser 593 113 14ms 3 Jul 2022 318th kenballus 593 113 12ms 17 Aug 2022 318th jmerle 🇳🇱 593 113 14ms 11 Jul 2023 318th WillConker 593 113 29ms 16 Jul 2023 318th inverseLorentz 🇦🇺 593 113 52ms 13 Oct 2023 318th imelxr 🇮🇱 593 113 13ms 17 Aug 2024 318th CyberTapir 593 113 14ms 27 Aug 2024 318th Troon 593 113 38ms 7 Feb 2025 318th TheZwierzLF 🇵🇱 593 113 16ms 2 Jun 2025 318th RaBa21 🇭🇺 593 113 13ms 19 Jul 2025 318th iczelia 🇩🇪 593 113 13ms 19 Oct 2025 318th Mabeloid 🇳🇴 593 113 12ms 20 Oct 2025 318th rotemkm 593 113 13ms 14 Feb 2026 338th AgathokakologicalBit 588 114 28ms 15 Jul 2019 338th TheAristos 588 114 46ms 31 Oct 2019 338th michelebastione 🇮🇹 588 114 15ms 19 Feb 2020 338th bastienvoirin 🇫🇷 588 114 39ms 7 Apr 2020 338th AIn0n 588 114 49ms 15 Jul 2021 338th bbakersmith 588 114 38ms 16 Jul 2021 338th liamsaliba 588 114 13ms 10 Nov 2021 338th ImpressedByRocks 588 114 17ms 18 Apr 2022 338th hiichbindermax 588 114 12ms 27 Jul 2023 338th klixel 🇨🇦 588 114 16ms 31 Dec 2024 338th chartung17 588 114 49ms 20 Apr 2025 349th lmeuser 583 115 12ms 2 Dec 2017 349th myfatemi04 583 115 14ms 10 Jan 2018 349th lrustand 583 115 13ms 14 Jan 2018 349th joshrosenkranz 583 115 164ms 2 Mar 2018 349th TMcBoyle 583 115 574ms 14 Sep 2018 349th qalle2 583 115 12ms 20 Apr 2019 349th mattyhempstead 583 115 39ms 1 Jun 2019 349th dymowski 583 115 108ms 9 Jul 2019 349th ieeemma 583 115 43ms 27 Sep 2019 349th adoxography 583 115 12ms 10 Oct 2019 349th itiievskyi 🇺🇦 583 115 12ms 7 Aug 2020 349th schachmattmatt 583 115 13ms 26 Sep 2021 349th AshyIsMe 🇦🇺 583 115 55ms 16 Jul 2022 349th vishwathg 583 115 47ms 17 Aug 2022 349th pinguicula 583 115 10ms 11 Apr 2023 349th JoaoFelipe3 583 115 12ms 16 Jan 2024 349th JorgiEagle 583 115 12ms 8 Feb 2024 349th Ralac07 🇦🇺 583 115 28ms 14 Jun 2024 349th OCNeve 583 115 15ms 18 Jun 2024 349th nemoyatpeace 583 115 27ms 3 Jan 2026 369th ReCubedGames 578 116 15ms 22 Jan 2019 369th JanJSmejkal 578 116 54ms 12 Jul 2019 369th Psirving 578 116 15ms 3 Aug 2020 369th pascscha 578 116 15ms 13 May 2021 369th MichaelMBradley 🇨🇦 578 116 31ms 13 Apr 2022 369th SniperSmiley 🇺🇸 578 116 12ms 29 Jun 2022 369th AZ9tumas 578 116 14ms 23 Oct 2022 369th goGuru 578 116 18ms 26 Dec 2022 369th LeeCamp 578 116 13ms 12 Jan 2023 369th Florian-Mt 578 116 19ms 26 Sep 2023 369th ssbhatt4321 578 116 11ms 14 Oct 2023 380th ozewski 573 117 10ms 2 May 2019 380th rgskinnerhpe 573 117 20ms 12 Jun 2019 380th bdendekk 573 117 11ms 10 Jul 2019 380th andre-lameirinhas 🇵🇹 573 117 50ms 1 Aug 2020 380th Andre3582 573 117 30ms 4 Nov 2020 380th Miles-1000 🇬🇧 573 117 37ms 28 Feb 2021 380th ludwig-n 573 117 26ms 6 Apr 2021 380th olavaga 573 117 14ms 13 Aug 2021 380th Kasci 573 117 67ms 28 Dec 2021 380th felixcroc 573 117 14ms 25 Apr 2022 380th georgehulme 573 117 27ms 12 Oct 2022 380th galloj 🇨🇿 573 117 25ms 6 Nov 2022 380th aalec 573 117 14ms 24 Apr 2024 380th HumanoidCPU 573 117 84ms 27 May 2024 380th CutSandstone 573 117 13ms 4 Jul 2024 380th JunkIce 573 117 22ms 23 Oct 2024 380th WillowWispy 573 117 35ms 25 May 2025 397th toombs-caeman 568 118 13ms 8 Mar 2020 397th TechnoJo4 568 118 12ms 15 Sep 2021 397th BrenSchaap 568 118 13ms 21 Oct 2021 397th markus-rekdal 568 118 12ms 10 May 2022 First Prev 321–400 of 813 Next Last
