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 471st neonchickens 797 79 30ms 6 Oct 2023 471st MWI-polygolf 797 79 21ms 6 Dec 2023 471st eddvrs 797 79 24ms 22 Dec 2023 471st tknight00 797 79 27ms 7 Mar 2024 471st thienudomsrirungruang 797 79 49ms 3 May 2024 471st IsaacAlexBarden 797 79 33ms 6 Feb 2025 471st taesungh 797 79 24ms 7 Jun 2025 471st benvreeves 797 79 20ms 25 Jul 2025 471st saturzay 797 79 27ms 19 Aug 2025 471st TransformLikeATensor 797 79 20ms 16 Oct 2025 471st tomh1012 797 79 24ms 3 Dec 2025 471st JesseNoEyes 🇺🇸 797 79 20ms 15 Jan 2026 471st milktea-ish 797 79 22ms 5 Mar 2026 494th j-Ewan 788 80 21ms 13 May 2022 494th osmith93 788 80 35ms 14 Jun 2022 494th hjcafaroUC 788 80 26ms 21 Jun 2022 494th dankleeman 788 80 19ms 8 Aug 2022 494th dillon-duncando 788 80 22ms 4 Oct 2022 494th DrPiranoid 788 80 24ms 11 Nov 2022 494th mdnestor 788 80 23ms 23 Dec 2022 494th Edjyzod 788 80 17ms 7 Mar 2023 494th henry-von-wichert 788 80 25ms 31 Mar 2023 494th Hortaros 788 80 21ms 16 Apr 2023 494th ankeetparikh 788 80 20ms 5 May 2023 494th Neonader 788 80 26ms 9 May 2023 494th nickgza 788 80 18ms 17 Aug 2023 494th MiranDaniel 🇨🇿 788 80 27ms 30 Aug 2023 494th Fanrco 788 80 19ms 31 Aug 2023 494th nyoshe 788 80 20ms 10 Oct 2023 494th AzroyAr 788 80 28ms 28 Dec 2023 494th Alex-Huggett 🇬🇧 788 80 58ms 13 Apr 2024 494th RobertHoeh 788 80 27ms 27 May 2024 494th LorenzoDeGaspari 788 80 24ms 27 May 2024 494th AstroOrbis 788 80 28ms 7 May 2025 494th vgamula 🇺🇦 788 80 23ms 16 Jul 2025 494th imoxyg 788 80 29ms 29 Aug 2025 494th Tristanchaang 788 80 22ms 13 Nov 2025 494th Jakob-L-M 788 80 29ms 23 hours ago 519th abba23 778 81 28ms 26 May 2022 519th docd 778 81 19ms 8 Aug 2022 519th Smetalo 778 81 29ms 25 Aug 2022 519th glesnick 778 81 25ms 6 Sep 2022 519th Yareeeema 778 81 25ms 3 Nov 2022 519th RandGuy 778 81 27ms 23 Nov 2022 519th GWStuart 778 81 25ms 19 Dec 2022 519th wa1ker38552 778 81 21ms 22 May 2023 519th LimaoC 778 81 23ms 11 Aug 2023 519th robertovers 778 81 24ms 2 Oct 2023 519th HanaEndUser 778 81 20ms 15 Feb 2024 519th Loag 778 81 19ms 22 Sep 2024 519th julian-hoelz 778 81 18ms 23 Sep 2024 519th GoldStar184 778 81 23ms 27 Nov 2024 519th mchalunderscore 778 81 24ms 5 Jan 2025 519th csharpython 778 81 15ms 2 Aug 2025 519th ImanolCiganda 778 81 27ms 26 Feb 2026 536th Ailko 🇧🇪 768 82 27ms 12 May 2022 536th joshmoody24 768 82 27ms 12 May 2022 536th andrewgopher 768 82 20ms 25 Jun 2022 536th estomagordo 🇳🇱 768 82 25ms 26 Oct 2022 536th ellis-rix 768 82 25ms 14 Nov 2022 536th twocatsinatrenchcoat 768 82 19ms 29 Nov 2022 536th aid-f 768 82 24ms 21 Mar 2023 536th henrydukepickle 768 82 18ms 8 Dec 2023 536th amollberg 🇸🇪 768 82 25ms 3 Jan 2024 536th mrmena 🇦🇺 768 82 29ms 19 Mar 2024 536th rifatx 768 82 26ms 16 Jul 2024 536th NicoH76 768 82 19ms 24 Apr 2025 536th 0dyse 768 82 27ms 29 Apr 2025 536th gamk3 768 82 19ms 6 May 2025 536th some-function 768 82 21ms 2 Jul 2025 536th jacekwladzinski 768 82 25ms 12 Nov 2025 536th Arkadios200 768 82 31ms 33 hours ago 553rd bonevbs 759 83 22ms 8 May 2022 553rd feherd 759 83 19ms 20 May 2022 553rd pbleich 759 83 24ms 24 Aug 2022 553rd RoscoeSmith 759 83 26ms 20 Nov 2022 553rd amadeusdotpng 759 83 19ms 22 Apr 2023 553rd ross-i 759 83 19ms 5 Jul 2023 553rd anonymaew 759 83 26ms 2 Aug 2023 553rd mstang107 759 83 23ms 20 Dec 2023 First Prev 481–560 of 848 Next Last