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 468th tknight00 797 79 26ms 7 Mar 2024 468th thienudomsrirungruang 797 79 48ms 3 May 2024 468th IsaacAlexBarden 797 79 25ms 6 Feb 2025 468th taesungh 797 79 23ms 7 Jun 2025 468th benvreeves 797 79 21ms 25 Jul 2025 468th saturzay 797 79 27ms 19 Aug 2025 468th TransformLikeATensor 797 79 19ms 16 Oct 2025 468th tomh1012 797 79 23ms 3 Dec 2025 468th JesseNoEyes 🇺🇸 797 79 19ms 15 Jan 2026 468th milktea-ish 797 79 19ms 27 days ago 468th jusaka 797 79 24ms 13 days ago 492nd j-Ewan 788 80 21ms 13 May 2022 492nd osmith93 788 80 33ms 14 Jun 2022 492nd hjcafaroUC 788 80 26ms 21 Jun 2022 492nd dankleeman 788 80 21ms 8 Aug 2022 492nd dillon-duncando 788 80 23ms 4 Oct 2022 492nd DrPiranoid 788 80 25ms 11 Nov 2022 492nd mdnestor 788 80 24ms 23 Dec 2022 492nd Edjyzod 788 80 16ms 7 Mar 2023 492nd henry-von-wichert 788 80 26ms 31 Mar 2023 492nd Hortaros 788 80 23ms 16 Apr 2023 492nd ankeetparikh 788 80 21ms 5 May 2023 492nd Neonader 788 80 28ms 9 May 2023 492nd nickgza 788 80 18ms 17 Aug 2023 492nd MiranDaniel 🇨🇿 788 80 26ms 30 Aug 2023 492nd Fanrco 788 80 18ms 31 Aug 2023 492nd nyoshe 788 80 20ms 10 Oct 2023 492nd AzroyAr 788 80 28ms 28 Dec 2023 492nd Alex-Huggett 🇬🇧 788 80 55ms 13 Apr 2024 492nd RobertHoeh 788 80 28ms 27 May 2024 492nd LorenzoDeGaspari 788 80 23ms 27 May 2024 492nd AstroOrbis 788 80 26ms 7 May 2025 492nd vgamula 🇺🇦 788 80 22ms 16 Jul 2025 492nd imoxyg 788 80 23ms 29 Aug 2025 492nd Tristanchaang 788 80 22ms 13 Nov 2025 516th abba23 778 81 26ms 26 May 2022 516th docd 778 81 18ms 8 Aug 2022 516th Smetalo 778 81 26ms 25 Aug 2022 516th glesnick 778 81 23ms 6 Sep 2022 516th Yareeeema 778 81 25ms 3 Nov 2022 516th RandGuy 778 81 26ms 23 Nov 2022 516th GWStuart 778 81 24ms 19 Dec 2022 516th wa1ker38552 778 81 19ms 22 May 2023 516th LimaoC 778 81 24ms 11 Aug 2023 516th robertovers 778 81 23ms 2 Oct 2023 516th HanaEndUser 778 81 19ms 15 Feb 2024 516th Loag 778 81 18ms 22 Sep 2024 516th julian-hoelz 778 81 19ms 23 Sep 2024 516th GoldStar184 778 81 24ms 27 Nov 2024 516th jastrzumb 778 81 24ms 5 Jan 2025 516th csharpython 778 81 17ms 2 Aug 2025 516th ImanolCiganda 778 81 25ms 26 Feb 2026 533rd Ailko 🇧🇪 768 82 27ms 12 May 2022 533rd joshmoody24 768 82 25ms 12 May 2022 533rd andrewgopher 768 82 20ms 25 Jun 2022 533rd estomagordo 🇳🇱 768 82 23ms 26 Oct 2022 533rd ellis-rix 768 82 25ms 14 Nov 2022 533rd twocatsinatrenchcoat 768 82 18ms 29 Nov 2022 533rd aid-f 768 82 23ms 21 Mar 2023 533rd henrydukepickle 768 82 18ms 8 Dec 2023 533rd amollberg 🇸🇪 768 82 24ms 3 Jan 2024 533rd mrmena 🇦🇺 768 82 29ms 19 Mar 2024 533rd rifatx 768 82 24ms 16 Jul 2024 533rd NicoH76 768 82 18ms 24 Apr 2025 533rd 0dyse 768 82 29ms 29 Apr 2025 533rd gamk3 768 82 19ms 6 May 2025 533rd some-function 768 82 18ms 2 Jul 2025 533rd jacekwladzinski 768 82 24ms 12 Nov 2025 549th bonevbs 759 83 20ms 8 May 2022 549th feherd 759 83 19ms 20 May 2022 549th pbleich 759 83 24ms 24 Aug 2022 549th RoscoeSmith 759 83 24ms 20 Nov 2022 549th amadeusdotpng 759 83 18ms 22 Apr 2023 549th ross-i 759 83 18ms 5 Jul 2023 549th anonymaew 759 83 27ms 2 Aug 2023 549th mstang107 759 83 24ms 20 Dec 2023 549th LHLaurini 🇧🇷 759 83 19ms 26 Jun 2024 549th C0derX3 🇺🇸 759 83 22ms 18 Sep 2024 549th ComputerKWasTaken 🇺🇸 759 83 23ms 20 Jan 2025 549th Vexxter9 🇳🇱 759 83 57ms 4 Feb 2025 First Prev 481–560 of 844 Next Last