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?
Leyland 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 235th adamnielson42 🇺🇸 802 91 11ms 22 Aug 2023 235th jhu04 802 91 11ms 18 Jan 2024 235th jacekwladzinski 802 91 9ms 4 Oct 2025 244th mstang107 793 92 16ms 20 Dec 2023 244th jameswmccarty 793 92 10ms 11 Jul 2024 244th PyryL 🇫🇮 793 92 9ms 22 Aug 2024 244th JesseNoEyes 🇺🇸 793 92 10ms 17 Nov 2024 248th adoxography 785 93 10ms 8 Oct 2020 248th nullie 785 93 10ms 9 Jun 2022 248th julienlamoureux78 785 93 13ms 18 Aug 2022 248th CatsAreFluffy 785 93 11ms 21 Dec 2023 248th elgan65536 🇺🇸 785 93 9ms 31 Mar 2024 248th Mikey-Beep 🇬🇧 785 93 10ms 2 Jun 2024 248th Papushkado 785 93 12ms 18 Nov 2025 248th klixel 🇨🇦 785 93 10ms 9 Jan 2026 256th bbakersmith 777 94 9ms 18 Jul 2021 256th jfallon1997 777 94 11ms 9 Aug 2022 256th wobblybits 777 94 10ms 19 Aug 2025 259th LeeCamp 768 95 10ms 27 Dec 2021 259th 4ndyJ 🇬🇧 768 95 9ms 7 Feb 2023 259th 0-ag 768 95 11ms 25 Aug 2025 259th nemoyatpeace 768 95 10ms 14 Jan 2026 259th TheSecondComing123 768 95 11ms 5 Feb 2026 264th Psirving 760 96 10ms 29 Jul 2020 264th henrytranter 760 96 10ms 27 Aug 2020 264th chrishm909 760 96 11ms 23 May 2021 264th sleepyStick 760 96 16ms 3 Dec 2021 264th tterem 760 96 11ms 8 Jun 2022 264th P-Quentin 🇫🇷 760 96 12ms 3 Aug 2022 264th sbyrne51 760 96 10ms 1 Oct 2022 264th NerdyMcNerd42 760 96 10ms 27 Oct 2022 272nd asadullayev 753 97 15ms 3 Mar 2021 272nd befoster 753 97 10ms 10 Apr 2021 272nd myleopard 753 97 14ms 15 Oct 2021 272nd Andrey135296 753 97 10ms 4 Apr 2022 272nd Bodo171 753 97 16ms 25 Nov 2022 277th ehulinsky 🇺🇸 745 98 10ms 11 Nov 2021 277th Trunksistor 🇫🇷 745 98 10ms 24 May 2022 277th MichaelMBradley 🇨🇦 745 98 10ms 19 Jun 2022 280th vezzick 737 99 14ms 7 Mar 2021 280th TimHuisman1703 737 99 10ms 7 Jan 2022 280th hellwue 737 99 9ms 25 Feb 2022 280th davecame 737 99 10ms 2 Aug 2023 284th EwanSkene 730 100 12ms 3 Sep 2020 284th boxjelly 730 100 11ms 14 Feb 2021 284th PhysicDev 🇫🇷 730 100 10ms 16 Mar 2022 284th wen1now 730 100 10ms 6 Nov 2023 284th Alban-Boissard 730 100 10ms 14 Jun 2025 284th TheZwierzLF 🇵🇱 730 100 10ms 17 Dec 2025 290th jameslindesay 723 101 42ms 25 Feb 2021 290th galloj 🇨🇿 723 101 11ms 21 Aug 2022 290th Acky-Acky 723 101 11ms 9 May 2024 293rd findegil 716 102 10ms 26 Aug 2020 293rd austinrwarner 716 102 11ms 25 Dec 2020 293rd Omega65536 🇩🇪 716 102 16ms 6 Jan 2021 293rd jhpaques 🇫🇷 716 102 14ms 29 Jul 2022 293rd jamesthekee 716 102 10ms 25 Jan 2025 298th atazzam 🇺🇸 709 103 14ms 2 Apr 2022 298th vishwathg 709 103 10ms 21 Aug 2022 298th fredrik-bakke 🇳🇴 709 103 10ms 2 Oct 2022 298th willschremmer 709 103 10ms 28 Apr 2024 298th wuzekai518 709 103 10ms 23 Jul 2024 298th Mabeloid 🇳🇴 709 103 9ms 22 Sep 2024 298th WillowWispy 709 103 10ms 17 Mar 2025 305th ydevor 🇮🇱 702 104 10ms 10 Mar 2021 305th Fishron 702 104 13ms 19 Oct 2021 307th mathwiz42 695 105 10ms 18 Aug 2020 307th PFischbeck 695 105 11ms 31 Oct 2020 307th estomagordo 🇳🇱 695 105 9ms 6 Dec 2021 307th 0dyse 695 105 14ms 12 Sep 2025 311th artieleach 689 106 14ms 7 Feb 2021 311th martinnorling 🇸🇪 689 106 10ms 31 Jan 2022 311th dylanjones92 689 106 10ms 26 Jan 2024 311th Europe2048 689 106 10ms 13 days ago 315th dostuffthatmatters 682 107 10ms 26 Jul 2020 315th guilhem-roy 🇫🇷 682 107 10ms 28 Feb 2022 315th celiendonze 🇨🇭 682 107 13ms 20 Apr 2023 315th Stockoh 🇫🇷 682 107 17ms 2 Oct 2024 315th tomh1012 682 107 10ms 24 Feb 2026 320th Ted-Barrett 🇦🇺 676 108 10ms 30 Sep 2021 First Prev 241–320 of 391 Next Last
