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 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 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 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 Lily 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 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 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 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 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 143rd shellbertt 🇨🇦 863 73 20ms 13 Jan 2023 143rd hunt-g 863 73 21ms 4 Feb 2023 143rd ljweel 863 73 21ms 13 Feb 2023 143rd jmerle 🇳🇱 863 73 22ms 16 Feb 2023 143rd TaserTheFox 🇺🇸 863 73 20ms 14 Mar 2023 143rd pinguicula 863 73 22ms 6 Apr 2023 143rd TheoKeller1 863 73 24ms 11 Jun 2023 143rd fkantelberg 863 73 19ms 16 Jul 2023 143rd Mikey-Beep 🇬🇧 863 73 21ms 31 Aug 2023 143rd eiburns 863 73 22ms 9 Oct 2023 143rd htareque 863 73 21ms 13 Oct 2023 143rd wearsunscreen 863 73 22ms 18 Oct 2023 143rd Grrisly 863 73 20ms 10 Nov 2023 143rd m42km 863 73 21ms 11 Nov 2023 143rd GeneralPoxter 863 73 20ms 7 Dec 2023 143rd logvp 863 73 24ms 12 Jan 2024 143rd JoaoFelipe3 863 73 22ms 13 Jan 2024 143rd ehulinsky 🇺🇸 863 73 21ms 16 Feb 2024 143rd Lewenhaupt 863 73 22ms 23 Feb 2024 143rd Yewzir 🇧🇪 863 73 20ms 5 Apr 2024 143rd stertooy 🇧🇪 863 73 20ms 9 Jun 2024 143rd cuboids 863 73 20ms 11 Jul 2024 143rd jipsong 🇩🇪 863 73 21ms 23 Jul 2024 143rd mattyhempstead 863 73 23ms 6 Oct 2024 143rd wh3n3v3r 🇨🇿 863 73 23ms 18 Nov 2024 143rd klixel 🇨🇦 863 73 21ms 18 Nov 2024 143rd tjwrenn 863 73 20ms 10 Dec 2024 143rd nullie 863 73 20ms 19 Dec 2024 143rd maxgodfrey2004 🇨🇦 863 73 21ms 13 Feb 2025 143rd lolgeny 863 73 19ms 22 Feb 2025 143rd andrewjc2000 863 73 21ms 23 Feb 2025 143rd Bulmenisaurus 863 73 23ms 2 Mar 2025 143rd souta-1326 863 73 22ms 1 Apr 2025 143rd BenjaminHGong 863 73 21ms 26 May 2025 143rd FEZfan 🇦🇺 863 73 20ms 11 Jul 2025 143rd wuduculfre 863 73 21ms 28 Jul 2025 143rd BREMAUCY 🇫🇷 863 73 28ms 24 Aug 2025 143rd FortuiteMan 🇫🇷 863 73 21ms 28 Sep 2025 143rd miaoaixuan 863 73 22ms 30 Sep 2025 143rd Lv0Sys 🇵🇱 863 73 25ms 7 Dec 2025 143rd zacharysfrazee 863 73 21ms 11 Jan 2026 143rd bpharaldsson 863 73 20ms 5 days ago 143rd Flekay 🇩🇪 863 73 21ms 14 mins ago 204th TobyBoyne 🇬🇧 851 74 23ms 4 May 2022 204th RDShah 851 74 21ms 6 May 2022 204th Indivicivet 851 74 20ms 9 May 2022 204th CedricGebistorf 851 74 20ms 9 May 2022 204th ophact 851 74 22ms 11 May 2022 204th ImpressedByRocks 851 74 20ms 17 May 2022 204th LHuitre 851 74 20ms 2 Jun 2022 204th neihousaigaai 851 74 20ms 8 Jun 2022 204th rowboat1 851 74 20ms 10 Jun 2022 204th inverseLorentz 🇦🇺 851 74 20ms 13 Jun 2022 204th yzhs 🇩🇪 851 74 19ms 16 Jun 2022 204th clementblaudeau 851 74 25ms 29 Jun 2022 204th adoxography 851 74 20ms 13 Jul 2022 204th Attero 🇸🇪 851 74 20ms 20 Jul 2022 204th Heathcorp 🇦🇺 851 74 19ms 27 Jul 2022 204th jfallon1997 851 74 20ms 11 Aug 2022 204th VictorFordham 851 74 24ms 26 Aug 2022 204th georgehulme 851 74 19ms 1 Sep 2022 204th smartiel 851 74 21ms 15 Sep 2022 204th trist224 🇫🇷 851 74 21ms 21 Sep 2022 204th Kloppermand 🇩🇰 851 74 22ms 7 Oct 2022 204th knutae 🇳🇴 851 74 23ms 9 Oct 2022 204th Troon 851 74 21ms 14 Oct 2022 204th MaxElf999 851 74 22ms 14 Oct 2022 204th jakobkordez 🇸🇮 851 74 20ms 19 Oct 2022 204th Fishron 851 74 19ms 29 Nov 2022 204th SniperSmiley 🇺🇸 851 74 20ms 6 Dec 2022 204th elephantpanda 851 74 21ms 10 Dec 2022 204th ArthurBond 851 74 19ms 19 Dec 2022 204th ItsMeNoobieboy 851 74 20ms 20 Dec 2022 204th Larspolo 851 74 20ms 25 Dec 2022 204th dcc5480 851 74 19ms 12 Jan 2023 204th Ripick 851 74 20ms 1 Feb 2023 204th m3nt0ras 🇬🇷 851 74 19ms 3 Feb 2023 204th Skwerl23 851 74 20ms 5 Feb 2023 204th frankgraziano 851 74 18ms 19 Feb 2023 204th KenanHanke 851 74 28ms 21 Feb 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