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 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 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 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 ><> ALGOL 68 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 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 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 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 464th benvreeves 797 79 21ms 25 Jul 2025 464th saturzay 797 79 27ms 19 Aug 2025 464th TransformLikeATensor 797 79 19ms 16 Oct 2025 464th tomh1012 797 79 23ms 3 Dec 2025 464th JesseNoEyes 🇺🇸 797 79 19ms 15 Jan 2026 464th denkyuu1 797 79 20ms 18 Feb 2026 464th milktea-ish 797 79 19ms 14 days ago 464th jusaka 797 79 24ms 76 mins ago 489th j-Ewan 788 80 21ms 13 May 2022 489th osmith93 788 80 33ms 14 Jun 2022 489th hjcafaroUC 788 80 26ms 21 Jun 2022 489th dankleeman 788 80 21ms 8 Aug 2022 489th dillon-duncando 788 80 23ms 4 Oct 2022 489th DrPiranoid 788 80 25ms 11 Nov 2022 489th mdnestor 788 80 24ms 23 Dec 2022 489th Edjyzod 788 80 16ms 7 Mar 2023 489th henry-von-wichert 788 80 26ms 31 Mar 2023 489th Hortaros 788 80 23ms 16 Apr 2023 489th ankeetparikh 788 80 21ms 5 May 2023 489th Neonader 788 80 28ms 9 May 2023 489th nickgza 788 80 18ms 17 Aug 2023 489th MiranDaniel 🇨🇿 788 80 26ms 30 Aug 2023 489th Fanrco 788 80 18ms 31 Aug 2023 489th nyoshe 788 80 20ms 10 Oct 2023 489th AzroyAr 788 80 28ms 28 Dec 2023 489th Alex-Huggett 🇬🇧 788 80 55ms 13 Apr 2024 489th RobertHoeh 788 80 28ms 27 May 2024 489th LorenzoDeGaspari 788 80 23ms 27 May 2024 489th AstroOrbis 788 80 26ms 7 May 2025 489th vgamula 🇺🇦 788 80 22ms 16 Jul 2025 489th imoxyg 788 80 23ms 29 Aug 2025 489th Tristanchaang 788 80 22ms 13 Nov 2025 513th abba23 778 81 26ms 26 May 2022 513th docd 778 81 18ms 8 Aug 2022 513th Smetalo 778 81 26ms 25 Aug 2022 513th glesnick 778 81 23ms 6 Sep 2022 513th Yareeeema 778 81 25ms 3 Nov 2022 513th RandGuy 778 81 26ms 23 Nov 2022 513th GWStuart 778 81 24ms 19 Dec 2022 513th wa1ker38552 778 81 19ms 22 May 2023 513th LimaoC 778 81 24ms 11 Aug 2023 513th robertovers 778 81 23ms 2 Oct 2023 513th HanaEndUser 778 81 19ms 15 Feb 2024 513th Loag 778 81 18ms 22 Sep 2024 513th julian-hoelz 778 81 19ms 23 Sep 2024 513th GoldStar184 778 81 24ms 27 Nov 2024 513th jastrzumb 778 81 24ms 5 Jan 2025 513th csharpython 778 81 17ms 2 Aug 2025 513th ImanolCiganda 778 81 25ms 20 days ago 530th Ailko 🇧🇪 768 82 27ms 12 May 2022 530th joshmoody24 768 82 25ms 12 May 2022 530th andrewgopher 768 82 20ms 25 Jun 2022 530th estomagordo 🇳🇱 768 82 23ms 26 Oct 2022 530th ellis-rix 768 82 25ms 14 Nov 2022 530th twocatsinatrenchcoat 768 82 18ms 29 Nov 2022 530th aid-f 768 82 23ms 21 Mar 2023 530th henrydukepickle 768 82 18ms 8 Dec 2023 530th amollberg 🇸🇪 768 82 24ms 3 Jan 2024 530th mrmena 🇦🇺 768 82 29ms 19 Mar 2024 530th rifatx 768 82 24ms 16 Jul 2024 530th NicoH76 768 82 18ms 24 Apr 2025 530th 0dyse 768 82 29ms 29 Apr 2025 530th gamk3 768 82 19ms 6 May 2025 530th some-function 768 82 18ms 2 Jul 2025 530th jacekwladzinski 768 82 24ms 12 Nov 2025 546th bonevbs 759 83 20ms 8 May 2022 546th feherd 759 83 19ms 20 May 2022 546th pbleich 759 83 24ms 24 Aug 2022 546th RoscoeSmith 759 83 24ms 20 Nov 2022 546th amadeusdotpng 759 83 18ms 22 Apr 2023 546th ross-i 759 83 18ms 5 Jul 2023 546th anonymaew 759 83 27ms 2 Aug 2023 546th mstang107 759 83 24ms 20 Dec 2023 546th LHLaurini 🇧🇷 759 83 19ms 26 Jun 2024 546th C0derX3 🇺🇸 759 83 22ms 18 Sep 2024 546th ComputerKWasTaken 🇺🇸 759 83 23ms 20 Jan 2025 546th Vexxter9 🇳🇱 759 83 57ms 4 Feb 2025 546th CodyKlingler 759 83 23ms 7 Feb 2025 546th OyuDays 759 83 19ms 17 Mar 2025 546th julianreece 759 83 23ms 29 Apr 2025 First Prev 481–560 of 840 Next Last