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 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 Gray Code Decoder Gray Code Encoder 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 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 Gray Code Decoder Gray Code Encoder 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 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 151st fredrik-bakke 🇳🇴 863 73 22ms 18 Sep 2022 151st OhmNomNom 863 73 26ms 7 Oct 2022 151st 0-4849 863 73 22ms 1 Nov 2022 151st M0PKOBKA 863 73 24ms 19 Dec 2022 151st calumacutt 863 73 25ms 19 Dec 2022 151st thehylian 863 73 23ms 2 Jan 2023 151st fynnkroeger 863 73 24ms 6 Jan 2023 151st shellbertt 🇨🇦 863 73 24ms 13 Jan 2023 151st hunt-g 863 73 20ms 4 Feb 2023 151st ljweel 863 73 21ms 13 Feb 2023 151st jmerle 🇳🇱 863 73 21ms 16 Feb 2023 151st TaserTheFox 🇺🇸 863 73 30ms 14 Mar 2023 151st pinguicula 863 73 20ms 6 Apr 2023 151st TheoKeller1 863 73 24ms 11 Jun 2023 151st fkantelberg 863 73 21ms 16 Jul 2023 151st eiburns 863 73 24ms 9 Oct 2023 151st htareque 863 73 25ms 13 Oct 2023 151st wearsunscreen 863 73 20ms 18 Oct 2023 151st Grrisly 863 73 20ms 10 Nov 2023 151st m42km 863 73 23ms 11 Nov 2023 151st GeneralPoxter 863 73 20ms 7 Dec 2023 151st logvp 863 73 26ms 12 Jan 2024 151st JoaoFelipe3 863 73 23ms 13 Jan 2024 151st ehulinsky 🇺🇸 863 73 20ms 16 Feb 2024 151st Lewenhaupt 863 73 20ms 23 Feb 2024 151st Yewzir 🇧🇪 863 73 20ms 5 Apr 2024 151st stertooy 🇧🇪 863 73 22ms 9 Jun 2024 151st cuboids 863 73 21ms 11 Jul 2024 151st jipsong 🇩🇪 863 73 21ms 23 Jul 2024 151st mattyhempstead 863 73 24ms 6 Oct 2024 151st wh3n3v3r 🇨🇿 863 73 20ms 18 Nov 2024 151st klixel 🇨🇦 863 73 21ms 18 Nov 2024 151st tjwrenn 863 73 22ms 10 Dec 2024 151st nullie 863 73 19ms 19 Dec 2024 151st maxgodfrey2004 🇨🇦 863 73 21ms 13 Feb 2025 151st lolgeny 863 73 19ms 22 Feb 2025 151st andrewjc2000 863 73 21ms 23 Feb 2025 151st Bulmenisaurus 863 73 23ms 2 Mar 2025 151st souta-1326 863 73 31ms 1 Apr 2025 151st BenjaminHGong 863 73 21ms 26 May 2025 151st FEZfan 🇦🇺 863 73 23ms 11 Jul 2025 151st wuduculfre 863 73 21ms 28 Jul 2025 151st BREMAUCY 🇫🇷 863 73 21ms 24 Aug 2025 151st FortuiteMan 🇫🇷 863 73 21ms 28 Sep 2025 151st miaoaixuan 863 73 22ms 30 Sep 2025 151st Lv0Sys 🇵🇱 863 73 24ms 7 Dec 2025 151st zacharysfrazee 863 73 21ms 11 Jan 2026 151st bpharaldsson 863 73 22ms 6 Feb 2026 151st Zin9zan9 863 73 19ms 19 days ago 151st madeforlosers 863 73 23ms 11 days ago 151st Jakob-L-M 863 73 19ms 2 days ago 212th TobyBoyne 🇬🇧 851 74 20ms 4 May 2022 212th RDShah 851 74 21ms 6 May 2022 212th Indivicivet 851 74 21ms 9 May 2022 212th CedricGebistorf 851 74 20ms 9 May 2022 212th ophact 851 74 23ms 11 May 2022 212th ImpressedByRocks 851 74 20ms 17 May 2022 212th LHuitre 851 74 20ms 2 Jun 2022 212th neihousaigaai 851 74 18ms 8 Jun 2022 212th rowboat1 851 74 21ms 10 Jun 2022 212th inverseLorentz 🇦🇺 851 74 19ms 13 Jun 2022 212th yzhs 🇩🇪 851 74 19ms 16 Jun 2022 212th clementblaudeau 851 74 24ms 29 Jun 2022 212th adoxography 851 74 19ms 13 Jul 2022 212th Attero 🇸🇪 851 74 21ms 20 Jul 2022 212th Heathcorp 🇦🇺 851 74 23ms 27 Jul 2022 212th jfallon1997 851 74 20ms 11 Aug 2022 212th VictorFordham 851 74 26ms 26 Aug 2022 212th georgehulme 851 74 20ms 1 Sep 2022 212th smartiel 851 74 21ms 15 Sep 2022 212th trist224 🇫🇷 851 74 19ms 21 Sep 2022 212th Kloppermand 🇩🇰 851 74 22ms 7 Oct 2022 212th knutae 🇳🇴 851 74 20ms 9 Oct 2022 212th Troon 851 74 20ms 14 Oct 2022 212th MaxElf999 851 74 21ms 14 Oct 2022 212th jakobkordez 🇸🇮 851 74 19ms 19 Oct 2022 212th Fishron 851 74 19ms 29 Nov 2022 212th SniperSmiley 🇺🇸 851 74 20ms 6 Dec 2022 212th 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