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 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 Calendar 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 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 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 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 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 Calendar 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 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 199th elephantpanda 851 74 20ms 10 Dec 2022 199th ArthurBond 851 74 20ms 19 Dec 2022 199th ItsMeNoobieboy 851 74 18ms 20 Dec 2022 199th Larspolo 851 74 18ms 25 Dec 2022 199th dcc5480 851 74 18ms 12 Jan 2023 199th Ripick 851 74 19ms 1 Feb 2023 199th m3nt0ras 🇬🇷 851 74 21ms 3 Feb 2023 199th Skwerl23 851 74 20ms 5 Feb 2023 199th frankgraziano 851 74 19ms 19 Feb 2023 199th KenanHanke 851 74 19ms 21 Feb 2023 199th DanielPeterssonAI 851 74 20ms 13 Mar 2023 199th jiaminglimjm 🇲🇾 851 74 18ms 20 Mar 2023 199th ejini6969 851 74 18ms 22 Mar 2023 199th GulgDev 851 74 18ms 22 Mar 2023 199th vrnprkh 851 74 19ms 30 Mar 2023 199th RuyiLi 851 74 21ms 1 Apr 2023 199th StardustGogeta 851 74 20ms 7 May 2023 199th zbreit 🇺🇸 851 74 19ms 7 May 2023 199th kyleclaassen 851 74 18ms 20 May 2023 199th mbittner20 851 74 18ms 27 May 2023 199th tweska 🇳🇱 851 74 19ms 5 Jun 2023 199th rollershutter 851 74 20ms 7 Jul 2023 199th 2011-Chan-Ethan 851 74 18ms 9 Jul 2023 199th cros107 🇦🇺 851 74 19ms 11 Aug 2023 199th yourlefthandman 851 74 19ms 16 Aug 2023 199th daisyyedda 851 74 22ms 17 Aug 2023 199th cesarm4 851 74 20ms 29 Aug 2023 199th midnattssol 🇸🇪 851 74 18ms 22 Sep 2023 199th lambda-abstraction 851 74 20ms 21 Oct 2023 199th levavft 851 74 18ms 26 Oct 2023 199th Buecherfresser 851 74 18ms 22 Nov 2023 199th anarconic 851 74 53ms 8 Dec 2023 199th azure-blondon 851 74 18ms 11 Dec 2023 199th kurkale6ka 851 74 20ms 20 Dec 2023 199th Dataen 851 74 20ms 10 Jan 2024 199th Anonymousellama21 851 74 20ms 14 Mar 2024 199th Bmrl7 851 74 20ms 23 Mar 2024 199th cefqrn 851 74 20ms 26 May 2024 199th drochom 851 74 19ms 18 Jun 2024 199th hiichbindermax 851 74 19ms 22 Jun 2024 199th wuzekai518 851 74 23ms 9 Jul 2024 199th madex 🇩🇪 851 74 19ms 9 Jul 2024 199th cykim8811 851 74 49ms 11 Jul 2024 199th imelxr 🇮🇱 851 74 24ms 17 Aug 2024 199th EnTerr 851 74 18ms 25 Aug 2024 199th Mabeloid 🇳🇴 851 74 19ms 1 Sep 2024 199th madeforlosers 851 74 19ms 5 Sep 2024 199th LostSyntax21 🇬🇧 851 74 19ms 10 Sep 2024 199th Deedogg 851 74 31ms 11 Sep 2024 199th MassimoParisi 851 74 19ms 18 Sep 2024 199th lifthrasiir 🇰🇷 851 74 19ms 13 Nov 2024 199th agreegious 851 74 18ms 17 Nov 2024 199th Stockoh 🇫🇷 851 74 23ms 17 Nov 2024 199th Andrey135296 851 74 20ms 24 Nov 2024 199th TralfamadorianComedian 851 74 18ms 6 Dec 2024 199th bltnppcnt 851 74 32ms 3 Jan 2025 199th ZorblaxV 851 74 19ms 12 Jan 2025 199th yokasuretsu 851 74 19ms 13 Jan 2025 199th Artemis21 🇬🇧 851 74 18ms 17 Jan 2025 199th gdpr777 851 74 32ms 10 Feb 2025 199th Pyroan 851 74 20ms 27 Mar 2025 199th Squimbletin 851 74 25ms 19 Apr 2025 199th Kowalskiexe 🇵🇱 851 74 19ms 19 Apr 2025 199th Dandandooo 851 74 19ms 23 Apr 2025 199th khangtm123 851 74 18ms 4 May 2025 199th 40fied4t 851 74 18ms 6 May 2025 199th keelimeguy 🇺🇸 851 74 19ms 13 May 2025 199th TheZwierzLF 🇵🇱 851 74 19ms 21 May 2025 199th kbeat 🇰🇿 851 74 19ms 21 May 2025 199th LvLError 851 74 19ms 29 May 2025 199th ffelixm 851 74 19ms 3 Jun 2025 199th Flekay 🇩🇪 851 74 43ms 19 Jun 2025 199th DoubleUynn 851 74 18ms 25 Jun 2025 199th osNiko 🇧🇷 851 74 20ms 26 Jul 2025 199th wobblybits 851 74 20ms 13 Aug 2025 First Prev 226–300 of 808 Next Last