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 204th DanielPeterssonAI 851 74 20ms 13 Mar 2023 204th jiaminglimjm 🇲🇾 851 74 20ms 20 Mar 2023 204th ejini6969 851 74 18ms 22 Mar 2023 204th GulgDev 851 74 19ms 22 Mar 2023 204th vrnprkh 851 74 19ms 30 Mar 2023 204th RuyiLi 851 74 21ms 1 Apr 2023 204th StardustGogeta 851 74 19ms 7 May 2023 204th zbreit 🇺🇸 851 74 20ms 7 May 2023 204th kyleclaassen 851 74 20ms 20 May 2023 204th mbittner20 851 74 20ms 27 May 2023 204th tweska 🇳🇱 851 74 20ms 5 Jun 2023 204th rollershutter 851 74 24ms 7 Jul 2023 204th 2011-Chan-Ethan 851 74 19ms 9 Jul 2023 204th cros107 🇦🇺 851 74 21ms 11 Aug 2023 204th yourlefthandman 851 74 20ms 16 Aug 2023 204th daisyyedda 851 74 22ms 17 Aug 2023 204th cesarm4 851 74 19ms 29 Aug 2023 204th midnattssol 🇸🇪 851 74 20ms 22 Sep 2023 204th lambda-abstraction 851 74 21ms 21 Oct 2023 204th levavft 851 74 20ms 26 Oct 2023 204th Buecherfresser 851 74 19ms 22 Nov 2023 204th anarconic 851 74 50ms 8 Dec 2023 204th azure-blondon 851 74 21ms 11 Dec 2023 204th kurkale6ka 851 74 22ms 20 Dec 2023 204th Dataen 851 74 19ms 10 Jan 2024 204th Anonymousellama21 851 74 22ms 14 Mar 2024 204th Bmrl7 851 74 20ms 23 Mar 2024 204th cefqrn 851 74 22ms 26 May 2024 204th drochom 851 74 19ms 18 Jun 2024 204th hiichbindermax 851 74 19ms 22 Jun 2024 204th wuzekai518 851 74 27ms 9 Jul 2024 204th madex 🇩🇪 851 74 20ms 9 Jul 2024 204th cykim8811 851 74 50ms 11 Jul 2024 204th imelxr 🇮🇱 851 74 25ms 17 Aug 2024 204th EnTerr 851 74 21ms 25 Aug 2024 204th Mabeloid 🇳🇴 851 74 20ms 1 Sep 2024 204th madeforlosers 851 74 19ms 5 Sep 2024 204th LostSyntax21 🇬🇧 851 74 19ms 10 Sep 2024 204th Deedogg 851 74 23ms 11 Sep 2024 204th MassimoParisi 851 74 21ms 18 Sep 2024 204th lifthrasiir 🇰🇷 851 74 18ms 13 Nov 2024 204th agreegious 851 74 19ms 17 Nov 2024 204th Stockoh 🇫🇷 851 74 28ms 17 Nov 2024 204th Andrey135296 851 74 22ms 24 Nov 2024 204th TralfamadorianComedian 851 74 21ms 6 Dec 2024 204th bltnppcnt 851 74 38ms 3 Jan 2025 204th ZorblaxV 851 74 22ms 12 Jan 2025 204th yokasuretsu 851 74 22ms 13 Jan 2025 204th Artemis21 🇬🇧 851 74 20ms 17 Jan 2025 204th gdpr777 851 74 37ms 10 Feb 2025 204th Pyroan 851 74 21ms 27 Mar 2025 204th Squimbletin 851 74 20ms 19 Apr 2025 204th Kowalskiexe 🇵🇱 851 74 20ms 19 Apr 2025 204th Dandandooo 851 74 20ms 23 Apr 2025 204th khangtm123 851 74 26ms 4 May 2025 204th 40fied4t 851 74 21ms 6 May 2025 204th keelimeguy 🇺🇸 851 74 19ms 13 May 2025 204th TheZwierzLF 🇵🇱 851 74 21ms 21 May 2025 204th kbeat 🇰🇿 851 74 19ms 21 May 2025 204th LvLError 851 74 19ms 29 May 2025 204th ffelixm 851 74 20ms 3 Jun 2025 204th DoubleUynn 851 74 19ms 25 Jun 2025 204th osNiko 🇧🇷 851 74 20ms 26 Jul 2025 204th wobblybits 851 74 23ms 13 Aug 2025 204th denisfouchard 851 74 19ms 23 Aug 2025 204th Emutis 🇱🇹 851 74 20ms 23 Aug 2025 204th edsrzf 🇳🇿 851 74 20ms 10 Sep 2025 204th Matter1024 🇮🇳 851 74 27ms 11 Sep 2025 204th pauljoohyunkim 851 74 18ms 25 Sep 2025 204th joll05 🇸🇪 851 74 24ms 1 Oct 2025 204th retrohun 851 74 20ms 3 Oct 2025 204th solisolu 851 74 23ms 4 Oct 2025 204th Code-Coder-coder 851 74 19ms 12 Oct 2025 204th fvla 851 74 32ms 31 Oct 2025 204th zgialor-lab 851 74 18ms 17 Dec 2025 204th 77Tigers 851 74 23ms 8 Jan 2026 204th netfri25 851 74 20ms 11 days ago 318th martinnorling 🇸🇪 840 75 24ms 5 May 2022 318th Trunksistor 🇫🇷 840 75 24ms 9 May 2022 318th 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