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 473rd dtaylor0 797 79 19ms 23 May 2023 473rd bac0id 797 79 20ms 26 Sep 2023 473rd neonchickens 797 79 30ms 6 Oct 2023 473rd MWI-polygolf 797 79 21ms 6 Dec 2023 473rd eddvrs 797 79 24ms 22 Dec 2023 473rd tknight00 797 79 27ms 7 Mar 2024 473rd thienudomsrirungruang 797 79 49ms 3 May 2024 473rd IsaacAlexBarden 797 79 33ms 6 Feb 2025 473rd taesungh 797 79 24ms 7 Jun 2025 473rd benvreeves 797 79 20ms 25 Jul 2025 473rd saturzay 797 79 27ms 19 Aug 2025 473rd TransformLikeATensor 797 79 20ms 16 Oct 2025 473rd tomh1012 797 79 24ms 3 Dec 2025 473rd JesseNoEyes 🇺🇸 797 79 20ms 15 Jan 2026 473rd milktea-ish 797 79 22ms 5 Mar 2026 496th j-Ewan 788 80 21ms 13 May 2022 496th osmith93 788 80 35ms 14 Jun 2022 496th hjcafaroUC 788 80 26ms 21 Jun 2022 496th dankleeman 788 80 19ms 8 Aug 2022 496th dillon-duncando 788 80 22ms 4 Oct 2022 496th DrPiranoid 788 80 24ms 11 Nov 2022 496th mdnestor 788 80 23ms 23 Dec 2022 496th Edjyzod 788 80 17ms 7 Mar 2023 496th henry-von-wichert 788 80 25ms 31 Mar 2023 496th Hortaros 788 80 21ms 16 Apr 2023 496th ankeetparikh 788 80 20ms 5 May 2023 496th Neonader 788 80 26ms 9 May 2023 496th nickgza 788 80 18ms 17 Aug 2023 496th MiranDaniel 🇨🇿 788 80 27ms 30 Aug 2023 496th Fanrco 788 80 19ms 31 Aug 2023 496th nyoshe 788 80 20ms 10 Oct 2023 496th AzroyAr 788 80 28ms 28 Dec 2023 496th Alex-Huggett 🇬🇧 788 80 58ms 13 Apr 2024 496th RobertHoeh 788 80 27ms 27 May 2024 496th LorenzoDeGaspari 788 80 24ms 27 May 2024 496th AstroOrbis 788 80 28ms 7 May 2025 496th vgamula 🇺🇦 788 80 23ms 16 Jul 2025 496th imoxyg 788 80 29ms 29 Aug 2025 496th Tristanchaang 788 80 22ms 13 Nov 2025 496th Jakob-L-M 788 80 29ms 4 days ago 521st abba23 778 81 28ms 26 May 2022 521st docd 778 81 19ms 8 Aug 2022 521st Smetalo 778 81 29ms 25 Aug 2022 521st glesnick 778 81 25ms 6 Sep 2022 521st Yareeeema 778 81 25ms 3 Nov 2022 521st RandGuy 778 81 27ms 23 Nov 2022 521st GWStuart 778 81 25ms 19 Dec 2022 521st wa1ker38552 778 81 21ms 22 May 2023 521st LimaoC 778 81 23ms 11 Aug 2023 521st robertovers 778 81 24ms 2 Oct 2023 521st HanaEndUser 778 81 20ms 15 Feb 2024 521st Loag 778 81 19ms 22 Sep 2024 521st julian-hoelz 778 81 18ms 23 Sep 2024 521st GoldStar184 778 81 23ms 27 Nov 2024 521st mchalunderscore 778 81 24ms 5 Jan 2025 521st csharpython 778 81 15ms 2 Aug 2025 521st ImanolCiganda 778 81 27ms 26 Feb 2026 538th Ailko 🇧🇪 768 82 27ms 12 May 2022 538th joshmoody24 768 82 27ms 12 May 2022 538th andrewgopher 768 82 20ms 25 Jun 2022 538th estomagordo 🇳🇱 768 82 25ms 26 Oct 2022 538th ellis-rix 768 82 25ms 14 Nov 2022 538th twocatsinatrenchcoat 768 82 19ms 29 Nov 2022 538th aid-f 768 82 24ms 21 Mar 2023 538th henrydukepickle 768 82 18ms 8 Dec 2023 538th amollberg 🇸🇪 768 82 25ms 3 Jan 2024 538th mrmena 🇦🇺 768 82 29ms 19 Mar 2024 538th rifatx 768 82 26ms 16 Jul 2024 538th NicoH76 768 82 19ms 24 Apr 2025 538th 0dyse 768 82 27ms 29 Apr 2025 538th gamk3 768 82 19ms 6 May 2025 538th some-function 768 82 21ms 2 Jul 2025 538th jacekwladzinski 768 82 25ms 12 Nov 2025 538th Arkadios200 768 82 31ms 4 days ago 555th bonevbs 759 83 22ms 8 May 2022 555th feherd 759 83 19ms 20 May 2022 555th pbleich 759 83 24ms 24 Aug 2022 555th RoscoeSmith 759 83 26ms 20 Nov 2022 555th amadeusdotpng 759 83 19ms 22 Apr 2023 555th ross-i 759 83 19ms 5 Jul 2023 First Prev 481–560 of 850 Next Last