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 314th logvp 495 111 52ms 12 Jan 2024 314th yuchuehw 495 111 13ms 17 Jun 2024 314th moustave 495 111 12ms 2 Dec 2024 314th jacekwladzinski 495 111 14ms 2 Oct 2025 314th FranklinJiaChen 495 111 59ms 23 Feb 2026 326th alangodfrey 491 112 15ms 11 Jun 2019 326th Malin001 491 112 25ms 4 Jan 2020 326th 130N35 491 112 16ms 22 Jan 2020 326th dyc3 491 112 15ms 1 Sep 2020 326th NanduBC 491 112 14ms 17 Mar 2021 326th asheeri 491 112 24ms 17 Aug 2021 326th hinser 491 112 37ms 30 Nov 2021 326th eshilo-draper 491 112 13ms 1 Nov 2022 326th b10011 🇫🇮 491 112 21ms 10 Jan 2023 326th jmfk 491 112 14ms 19 Apr 2024 326th Ythaenagor 491 112 14ms 5 Aug 2024 326th agreegious 491 112 11ms 17 Nov 2024 326th Alban-Boissard 491 112 147ms 14 Jun 2025 326th addmai 491 112 15ms 25 Jul 2025 326th osNiko 🇧🇷 491 112 12ms 21 Aug 2025 326th Andrey2001 491 112 19ms 24 Nov 2025 326th netfri25 🇮🇱 491 112 14ms 17 Feb 2026 343rd timkaiser 487 113 49ms 19 Apr 2019 343rd nullie 487 113 12ms 31 Jul 2019 343rd jmhowl 487 113 11ms 17 Dec 2019 343rd SupImDos 487 113 64ms 6 Nov 2020 343rd hiddicop 🇸🇪 487 113 24ms 25 Jan 2021 343rd tnecio 487 113 23ms 29 Apr 2021 343rd clementblaudeau 487 113 13ms 28 May 2021 343rd AbelPelser 487 113 14ms 3 Jul 2022 343rd kenballus 487 113 12ms 17 Aug 2022 343rd WillConker 487 113 29ms 16 Jul 2023 343rd inverseLorentz 🇦🇺 487 113 52ms 13 Oct 2023 343rd imelxr 🇮🇱 487 113 13ms 17 Aug 2024 343rd CyberTapir 487 113 14ms 27 Aug 2024 343rd Troon 487 113 38ms 7 Feb 2025 343rd TheZwierzLF 🇵🇱 487 113 16ms 2 Jun 2025 343rd iczelia 🇩🇪 487 113 13ms 19 Oct 2025 343rd Mabeloid 🇳🇴 487 113 12ms 20 Oct 2025 343rd rotemkm 487 113 13ms 14 Feb 2026 361st AgathokakologicalBit 482 114 28ms 15 Jul 2019 361st TheAristos 482 114 46ms 31 Oct 2019 361st michelebastione 🇮🇹 482 114 15ms 19 Feb 2020 361st bastienvoirin 🇫🇷 482 114 39ms 7 Apr 2020 361st AIn0n 482 114 49ms 15 Jul 2021 361st bbakersmith 482 114 38ms 16 Jul 2021 361st liamsaliba 482 114 13ms 10 Nov 2021 361st ImpressedByRocks 482 114 17ms 18 Apr 2022 361st hiichbindermax 482 114 12ms 27 Jul 2023 361st klixel 🇨🇦 482 114 16ms 31 Dec 2024 361st chartung17 482 114 49ms 20 Apr 2025 372nd lmeuser 478 115 12ms 2 Dec 2017 372nd myfatemi04 478 115 14ms 10 Jan 2018 372nd lrustand 478 115 13ms 14 Jan 2018 372nd joshrosenkranz 478 115 164ms 2 Mar 2018 372nd TMcBoyle 478 115 574ms 14 Sep 2018 372nd qalle2 478 115 12ms 20 Apr 2019 372nd mattyhempstead 478 115 39ms 1 Jun 2019 372nd dymowski 478 115 108ms 9 Jul 2019 372nd ieeemma 478 115 43ms 27 Sep 2019 372nd adoxography 478 115 12ms 10 Oct 2019 372nd itiievskyi 🇺🇦 478 115 12ms 7 Aug 2020 372nd schachmattmatt 478 115 13ms 26 Sep 2021 372nd vishwathg 478 115 47ms 17 Aug 2022 372nd JoaoFelipe3 478 115 12ms 16 Jan 2024 372nd JorgiEagle 478 115 12ms 8 Feb 2024 372nd Ralac07 🇦🇺 478 115 28ms 14 Jun 2024 372nd OCNeve 478 115 15ms 18 Jun 2024 372nd nemoyatpeace 478 115 27ms 3 Jan 2026 390th ReCubedGames 474 116 15ms 22 Jan 2019 390th JanJSmejkal 474 116 54ms 12 Jul 2019 390th Psirving 474 116 15ms 3 Aug 2020 390th pascscha 474 116 15ms 13 May 2021 390th MichaelMBradley 🇨🇦 474 116 31ms 13 Apr 2022 390th SniperSmiley 🇺🇸 474 116 12ms 29 Jun 2022 390th AZ9tumas 474 116 14ms 23 Oct 2022 390th goGuru 474 116 18ms 26 Dec 2022 390th LeeCamp 474 116 13ms 12 Jan 2023 390th Florian-Mt 474 116 19ms 26 Sep 2023 390th ssbhatt4321 474 116 11ms 14 Oct 2023 First Prev 321–400 of 813 Next Last
