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 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 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 ArkScript 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 ArkScript 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 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 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 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 469th nickgza 788 80 16ms 17 Aug 2023 469th MiranDaniel 🇨🇿 788 80 25ms 30 Aug 2023 469th Fanrco 788 80 17ms 31 Aug 2023 469th nyoshe 788 80 19ms 10 Oct 2023 469th AzroyAr 788 80 26ms 28 Dec 2023 469th Alex-Huggett 🇬🇧 788 80 56ms 13 Apr 2024 469th RobertHoeh 788 80 27ms 27 May 2024 469th LorenzoDeGaspari 788 80 23ms 27 May 2024 469th AstroOrbis 788 80 25ms 7 May 2025 469th vgamula 🇺🇦 788 80 23ms 16 Jul 2025 469th imoxyg 788 80 23ms 29 Aug 2025 469th Tristanchaang 788 80 21ms 13 Nov 2025 493rd abba23 778 81 25ms 26 May 2022 493rd docd 778 81 20ms 8 Aug 2022 493rd Smetalo 778 81 24ms 25 Aug 2022 493rd glesnick 778 81 22ms 6 Sep 2022 493rd Yareeeema 778 81 27ms 3 Nov 2022 493rd RandGuy 778 81 25ms 23 Nov 2022 493rd GWStuart 778 81 25ms 19 Dec 2022 493rd wa1ker38552 778 81 20ms 22 May 2023 493rd LimaoC 778 81 22ms 11 Aug 2023 493rd robertovers 778 81 22ms 2 Oct 2023 493rd HanaEndUser 778 81 18ms 15 Feb 2024 493rd Loag 778 81 17ms 22 Sep 2024 493rd julian-hoelz 778 81 17ms 23 Sep 2024 493rd JesseNoEyes 🇺🇸 778 81 19ms 4 Oct 2024 493rd GoldStar184 778 81 23ms 27 Nov 2024 493rd ihatethefrench 778 81 22ms 5 Jan 2025 493rd csharpython 778 81 17ms 2 Aug 2025 510th Ailko 🇧🇪 768 82 24ms 12 May 2022 510th joshmoody24 768 82 25ms 12 May 2022 510th andrewgopher 768 82 18ms 25 Jun 2022 510th estomagordo 🇳🇱 768 82 23ms 26 Oct 2022 510th ThatAlo 768 82 23ms 14 Nov 2022 510th twocatsinatrenchcoat 768 82 18ms 29 Nov 2022 510th aid-f 768 82 23ms 21 Mar 2023 510th henrydukepickle 768 82 18ms 8 Dec 2023 510th amollberg 🇸🇪 768 82 22ms 3 Jan 2024 510th mrmena 🇦🇺 768 82 27ms 19 Mar 2024 510th rifatx 768 82 24ms 16 Jul 2024 510th NicoH76 768 82 17ms 24 Apr 2025 510th 0dyse 768 82 25ms 29 Apr 2025 510th gamk3 768 82 19ms 6 May 2025 510th some-function 768 82 16ms 2 Jul 2025 510th jacekwladzinski 768 82 23ms 12 Nov 2025 526th bonevbs 759 83 22ms 8 May 2022 526th feherd 759 83 19ms 20 May 2022 526th pbleich 759 83 23ms 24 Aug 2022 526th RoscoeSmith 759 83 22ms 20 Nov 2022 526th amadeusdotpng 759 83 19ms 22 Apr 2023 526th ross-i 759 83 16ms 5 Jul 2023 526th anonymaew 759 83 25ms 2 Aug 2023 526th mstang107 759 83 23ms 20 Dec 2023 526th LHLaurini 🇧🇷 759 83 18ms 26 Jun 2024 526th C0derX3 🇺🇸 759 83 20ms 18 Sep 2024 526th ComputerKWasTaken 🇺🇸 759 83 24ms 20 Jan 2025 526th Vexxter9 🇳🇱 759 83 55ms 4 Feb 2025 526th CodyKlingler 759 83 22ms 7 Feb 2025 526th OyuDays 759 83 19ms 17 Mar 2025 526th julianreece 759 83 23ms 29 Apr 2025 526th rustykitty 🇺🇸 759 83 21ms 24 Oct 2025 542nd Feniske 🇫🇷 750 84 19ms 7 Oct 2022 542nd Eilonlif 🇮🇱 750 84 22ms 29 Mar 2023 542nd mhsaul 750 84 16ms 11 Apr 2023 542nd Phyisis 750 84 22ms 30 Apr 2024 542nd MaxCastella 🇫🇷 750 84 22ms 11 Oct 2024 542nd SURAJMITTAL 750 84 18ms 17 Dec 2024 542nd simplylu 750 84 18ms 5 Jan 2025 542nd WillowWispy 750 84 19ms 14 Mar 2025 542nd VedJosh 750 84 25ms 3 May 2025 542nd hetz2625 750 84 23ms 4 May 2025 542nd ottav14 750 84 22ms 1 Dec 2025 542nd benanlam 750 84 16ms 7 days ago 554th aazuspan 741 85 23ms 15 Jun 2022 554th myleopard 741 85 21ms 20 Jul 2022 554th LukasFolwarczny 🇨🇿 741 85 22ms 16 Sep 2022 554th SB-945 741 85 22ms 7 Feb 2024 554th aaardwark 741 85 21ms 1 Jun 2025 554th kmathis22 741 85 19ms 10 Sep 2025 560th MichaelMBradley 🇨🇦 733 86 22ms 5 Jun 2022 First Prev 481–560 of 813 Next Last