Collatz 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 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel 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 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 ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel 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 Calendar 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 142nd hunt-g 863 73 19ms 4 Feb 2023 142nd ljweel 863 73 20ms 13 Feb 2023 142nd jmerle 🇳🇱 863 73 19ms 16 Feb 2023 142nd TaserTheFox 🇺🇸 863 73 24ms 14 Mar 2023 142nd pinguicula 863 73 19ms 6 Apr 2023 142nd TheoKeller1 863 73 23ms 11 Jun 2023 142nd fkantelberg 863 73 19ms 16 Jul 2023 142nd Mikey-Beep 🇬🇧 863 73 19ms 31 Aug 2023 142nd eiburns 863 73 23ms 9 Oct 2023 142nd htareque 863 73 19ms 13 Oct 2023 142nd wearsunscreen 863 73 21ms 18 Oct 2023 142nd Grrisly 863 73 19ms 10 Nov 2023 142nd m42km 863 73 21ms 11 Nov 2023 142nd GeneralPoxter 863 73 18ms 7 Dec 2023 142nd logvp 863 73 23ms 12 Jan 2024 142nd JoaoFelipe3 863 73 21ms 13 Jan 2024 142nd ehulinsky 🇺🇸 863 73 20ms 16 Feb 2024 142nd Lewenhaupt 863 73 19ms 23 Feb 2024 142nd Yewzir 🇧🇪 863 73 20ms 5 Apr 2024 142nd stertooy 🇧🇪 863 73 18ms 9 Jun 2024 142nd cuboids 863 73 21ms 11 Jul 2024 142nd jipsong 🇩🇪 863 73 20ms 23 Jul 2024 142nd mattyhempstead 863 73 20ms 6 Oct 2024 142nd wh3n3v3r 🇨🇿 863 73 19ms 18 Nov 2024 142nd klixel 🇨🇦 863 73 20ms 18 Nov 2024 142nd tjwrenn 863 73 19ms 10 Dec 2024 142nd nullie 863 73 19ms 19 Dec 2024 142nd maxgodfrey2004 🇨🇦 863 73 22ms 13 Feb 2025 142nd lolgeny 863 73 19ms 22 Feb 2025 142nd andrewjc2000 863 73 20ms 23 Feb 2025 142nd Bulmenisaurus 863 73 21ms 2 Mar 2025 142nd souta-1326 863 73 19ms 1 Apr 2025 142nd BenjaminHGong 863 73 20ms 26 May 2025 142nd FEZfan 🇦🇺 863 73 19ms 11 Jul 2025 142nd wuduculfre 863 73 19ms 28 Jul 2025 142nd BREMAUCY 🇫🇷 863 73 19ms 24 Aug 2025 142nd FortuiteMan 🇫🇷 863 73 21ms 28 Sep 2025 142nd miaoaixuan 863 73 22ms 30 Sep 2025 142nd Lv0Sys 🇵🇱 863 73 23ms 7 Dec 2025 142nd zacharysfrazee 863 73 19ms 15 hours ago 201st TobyBoyne 🇬🇧 851 74 22ms 4 May 2022 201st RDShah 851 74 18ms 6 May 2022 201st Indivicivet 851 74 19ms 9 May 2022 201st CedricGebistorf 851 74 17ms 9 May 2022 201st ophact 851 74 21ms 11 May 2022 201st ImpressedByRocks 851 74 18ms 17 May 2022 201st LHuitre 851 74 18ms 2 Jun 2022 201st neihousaigaai 851 74 17ms 8 Jun 2022 201st rowboat1 851 74 18ms 10 Jun 2022 201st inverseLorentz 🇦🇺 851 74 18ms 13 Jun 2022 201st yzhs 🇩🇪 851 74 18ms 16 Jun 2022 201st clementblaudeau 851 74 22ms 29 Jun 2022 201st adoxography 851 74 19ms 13 Jul 2022 201st Attero 🇸🇪 851 74 19ms 20 Jul 2022 201st Heathcorp 🇦🇺 851 74 18ms 27 Jul 2022 201st jfallon1997 851 74 18ms 11 Aug 2022 201st VictorFordham 851 74 24ms 26 Aug 2022 201st georgehulme 851 74 21ms 1 Sep 2022 201st smartiel 851 74 18ms 15 Sep 2022 201st trist224 🇫🇷 851 74 18ms 21 Sep 2022 201st Kloppermand 🇩🇰 851 74 20ms 7 Oct 2022 201st knutae 🇳🇴 851 74 18ms 9 Oct 2022 201st Troon 851 74 19ms 14 Oct 2022 201st MaxElf999 851 74 20ms 14 Oct 2022 201st jakobkordez 🇸🇮 851 74 19ms 19 Oct 2022 201st Fishron 851 74 18ms 29 Nov 2022 201st SniperSmiley 🇺🇸 851 74 18ms 6 Dec 2022 201st elephantpanda 851 74 23ms 10 Dec 2022 201st ArthurBond 851 74 18ms 19 Dec 2022 201st ItsMeNoobieboy 851 74 19ms 20 Dec 2022 201st Larspolo 851 74 18ms 25 Dec 2022 201st dcc5480 851 74 20ms 12 Jan 2023 201st Ripick 851 74 19ms 1 Feb 2023 201st m3nt0ras 🇬🇷 851 74 18ms 3 Feb 2023 201st Skwerl23 851 74 20ms 5 Feb 2023 201st frankgraziano 851 74 18ms 19 Feb 2023 201st KenanHanke 851 74 19ms 21 Feb 2023 201st DanielPeterssonAI 851 74 19ms 13 Mar 2023 201st jiaminglimjm 🇲🇾 851 74 18ms 20 Mar 2023 201st ejini6969 851 74 19ms 22 Mar 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