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 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 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 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 446th Pena86 797 79 25ms 14 Sep 2022 446th hymanimy 797 79 26ms 24 Nov 2022 446th Demonarchet 797 79 19ms 18 Apr 2023 446th dtaylor0 797 79 20ms 23 May 2023 446th bac0id 797 79 19ms 26 Sep 2023 446th neonchickens 797 79 25ms 6 Oct 2023 446th MWI-polygolf 797 79 19ms 6 Dec 2023 446th eddvrs 797 79 22ms 22 Dec 2023 446th tknight00 797 79 26ms 7 Mar 2024 446th thienudomsrirungruang 797 79 44ms 3 May 2024 446th IsaacAlexBarden 797 79 23ms 6 Feb 2025 446th taesungh 797 79 24ms 7 Jun 2025 446th benvreeves 797 79 20ms 25 Jul 2025 446th saturzay 797 79 25ms 19 Aug 2025 446th TransformLikeATensor 797 79 20ms 16 Oct 2025 446th tomh1012 797 79 23ms 13 days ago 467th j-Ewan 788 80 20ms 13 May 2022 467th osmith93 788 80 32ms 14 Jun 2022 467th hjcafaroUC 788 80 25ms 21 Jun 2022 467th dankleeman 788 80 20ms 8 Aug 2022 467th dillon-duncando 788 80 24ms 4 Oct 2022 467th DrPiranoid 788 80 22ms 11 Nov 2022 467th mdnestor 788 80 23ms 23 Dec 2022 467th Edjyzod 788 80 16ms 7 Mar 2023 467th henry-von-wichert 788 80 24ms 31 Mar 2023 467th Hortaros 788 80 22ms 16 Apr 2023 467th ankeetparikh 788 80 18ms 5 May 2023 467th Neonader 788 80 25ms 9 May 2023 467th nickgza 788 80 16ms 17 Aug 2023 467th MiranDaniel 🇨🇿 788 80 25ms 30 Aug 2023 467th Fanrco 788 80 17ms 31 Aug 2023 467th nyoshe 788 80 19ms 10 Oct 2023 467th AzroyAr 788 80 26ms 28 Dec 2023 467th Alex-Huggett 🇬🇧 788 80 56ms 13 Apr 2024 467th RobertHoeh 788 80 27ms 27 May 2024 467th LorenzoDeGaspari 788 80 23ms 27 May 2024 467th AstroOrbis 788 80 25ms 7 May 2025 467th vgamula 🇺🇦 788 80 23ms 16 Jul 2025 467th imoxyg 788 80 23ms 29 Aug 2025 467th Tristanchaang 788 80 21ms 13 Nov 2025 491st abba23 778 81 25ms 26 May 2022 491st docd 778 81 20ms 8 Aug 2022 491st Smetalo 778 81 24ms 25 Aug 2022 491st glesnick 778 81 22ms 6 Sep 2022 491st Yareeeema 778 81 27ms 3 Nov 2022 491st RandGuy 778 81 25ms 23 Nov 2022 491st GWStuart 778 81 25ms 19 Dec 2022 491st wa1ker38552 778 81 20ms 22 May 2023 491st LimaoC 778 81 22ms 11 Aug 2023 491st robertovers 778 81 22ms 2 Oct 2023 491st HanaEndUser 778 81 18ms 15 Feb 2024 491st Loag 778 81 17ms 22 Sep 2024 491st julian-hoelz 778 81 17ms 23 Sep 2024 491st JesseNoEyes 🇺🇸 778 81 19ms 4 Oct 2024 491st GoldStar184 778 81 23ms 27 Nov 2024 491st ihatethefrench 778 81 22ms 5 Jan 2025 491st csharpython 778 81 17ms 2 Aug 2025 508th Ailko 🇧🇪 768 82 24ms 12 May 2022 508th joshmoody24 768 82 25ms 12 May 2022 508th andrewgopher 768 82 18ms 25 Jun 2022 508th estomagordo 🇳🇱 768 82 23ms 26 Oct 2022 508th ThatAlo 768 82 23ms 14 Nov 2022 508th twocatsinatrenchcoat 768 82 18ms 29 Nov 2022 508th aid-f 768 82 23ms 21 Mar 2023 508th henrydukepickle 768 82 18ms 8 Dec 2023 508th amollberg 🇸🇪 768 82 22ms 3 Jan 2024 508th mrmena 🇦🇺 768 82 27ms 19 Mar 2024 508th rifatx 768 82 24ms 16 Jul 2024 508th NicoH76 768 82 17ms 24 Apr 2025 508th 0dyse 768 82 25ms 29 Apr 2025 508th gamk3 768 82 19ms 6 May 2025 508th some-function 768 82 16ms 2 Jul 2025 508th jacekwladzinski 768 82 23ms 12 Nov 2025 524th bonevbs 759 83 22ms 8 May 2022 524th feherd 759 83 19ms 20 May 2022 First Prev 451–525 of 810 Next Last