Collatz in Python in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 358th celiendonze 🇨🇭 829 76 27ms 5 Jul 2023 358th brochmann 🇸🇪 829 76 19ms 13 Aug 2023 358th Command-Master 829 76 35ms 2 Oct 2023 358th chartung17 829 76 19ms 17 Dec 2023 358th smokestacklightnin 🇺🇸 829 76 30ms 10 Jan 2024 358th NickTheEASDude 🇺🇸 829 76 62ms 26 Jan 2024 358th yuchuehw 829 76 26ms 2 Feb 2024 358th Azearia 829 76 32ms 26 Feb 2024 358th tpasfieldERAU 829 76 21ms 18 May 2024 358th khavik 829 76 26ms 29 May 2024 358th Ythaenagor 829 76 22ms 5 Aug 2024 358th martion2007 829 76 50ms 9 Aug 2024 358th sjrct 829 76 25ms 10 Aug 2024 358th Mathrew2012 829 76 22ms 9 Nov 2024 358th kawrei 829 76 24ms 4 May 2025 358th RaBa21 🇭🇺 829 76 26ms 19 Jul 2025 358th mathieurodic 829 76 26ms 25 days ago 358th DrakeSeteraO 829 76 53ms 23 days ago 394th cooljoseph1 818 77 23ms 6 May 2022 394th krcs 🇵🇱 818 77 20ms 11 May 2022 394th kenballus 818 77 24ms 13 Jul 2022 394th 104210 818 77 23ms 29 Jul 2022 394th andre-de-lorde 818 77 19ms 1 Sep 2022 394th zstephe 818 77 24ms 2 Dec 2022 394th badboj40 818 77 24ms 27 Dec 2022 394th henrytranter 818 77 24ms 11 Jan 2023 394th DragonaireM 818 77 24ms 6 Feb 2023 394th steffan-polygolf 818 77 26ms 19 Feb 2023 394th kellantech 818 77 18ms 21 May 2023 394th Ty-Cyr 818 77 18ms 14 Jul 2023 394th camieac 🇬🇧 818 77 23ms 14 Jul 2023 394th nathsou 🇫🇷 818 77 20ms 2 Sep 2023 394th MisterrLuck 818 77 22ms 7 Sep 2023 394th alexjurkiewicz 🇦🇺 818 77 20ms 7 Nov 2023 394th askipio 818 77 22ms 22 Nov 2023 394th trinityy-7 818 77 22ms 17 Dec 2023 394th zwxzwxzwx21 818 77 26ms 30 Jan 2024 394th PyryL 🇫🇮 818 77 19ms 23 Aug 2024 394th CyberTapir 818 77 22ms 27 Aug 2024 394th junten1 818 77 25ms 20 Oct 2024 394th croc54 818 77 22ms 24 Dec 2024 394th za3k 818 77 23ms 3 Jun 2025 394th mossiegoat 818 77 19ms 17 Aug 2025 419th AGoyet 808 78 29ms 29 Jul 2022 419th RYNO8 808 78 21ms 16 Aug 2022 419th TheCod-r 🇦🇶 808 78 29ms 28 Sep 2022 419th Marthe-CC 808 78 22ms 9 Oct 2022 419th Wildst 808 78 18ms 2 Nov 2022 419th nmgetahun 808 78 22ms 4 Dec 2022 419th Techdude01 808 78 22ms 13 Dec 2022 419th tvcv901 808 78 19ms 22 Mar 2023 419th oceko 808 78 21ms 24 Mar 2023 419th yoyoyonono 808 78 25ms 15 May 2023 419th Nic0M 808 78 18ms 13 Aug 2023 419th ssbhatt4321 808 78 27ms 14 Oct 2023 419th wyarde 808 78 19ms 7 Nov 2023 419th ItsEthanXYZ 808 78 19ms 24 Dec 2023 419th adamreidsmith 808 78 39ms 16 Feb 2024 419th Jacob385 808 78 60ms 5 Mar 2024 419th DGipe 808 78 22ms 13 May 2024 419th cyxv 808 78 25ms 2 Aug 2024 419th gallium-gonzollium 808 78 26ms 26 Aug 2024 419th Europe2048 808 78 19ms 24 Nov 2024 419th GeneralFabian 808 78 24ms 14 Dec 2024 440th kevdah 797 79 21ms 27 May 2022 440th jacklynnepenick 797 79 18ms 22 Jun 2022 440th james-downey 797 79 25ms 9 Jul 2022 440th andre-lameirinhas 🇵🇹 797 79 22ms 26 Jul 2022 440th hamsterskywalker 797 79 18ms 7 Sep 2022 440th Pena86 797 79 25ms 14 Sep 2022 440th hymanimy 797 79 24ms 24 Nov 2022 440th Demonarchet 797 79 19ms 18 Apr 2023 440th dtaylor0 797 79 20ms 23 May 2023 440th bac0id 797 79 20ms 26 Sep 2023 440th neonchickens 797 79 25ms 6 Oct 2023 First Prev 376–450 of 801 Next Last