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 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 Calendar 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 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 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 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 Calendar 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 523rd RoscoeSmith 759 83 22ms 20 Nov 2022 523rd amadeusdotpng 759 83 19ms 22 Apr 2023 523rd ross-i 759 83 16ms 5 Jul 2023 523rd anonymaew 759 83 25ms 2 Aug 2023 523rd mstang107 759 83 23ms 20 Dec 2023 523rd LHLaurini 🇧🇷 759 83 18ms 26 Jun 2024 523rd C0derX3 🇺🇸 759 83 20ms 18 Sep 2024 523rd ComputerKWasTaken 🇺🇸 759 83 24ms 20 Jan 2025 523rd Vexxter9 🇳🇱 759 83 55ms 4 Feb 2025 523rd CodyKlingler 759 83 22ms 7 Feb 2025 523rd OyuDays 759 83 19ms 17 Mar 2025 523rd julianreece 759 83 23ms 29 Apr 2025 523rd rustykitty 🇺🇸 759 83 21ms 24 Oct 2025 539th Feniske 🇫🇷 750 84 19ms 7 Oct 2022 539th Eilonlif 🇮🇱 750 84 22ms 29 Mar 2023 539th mhsaul 750 84 16ms 11 Apr 2023 539th Phyisis 750 84 22ms 30 Apr 2024 539th MaxCastella 🇫🇷 750 84 22ms 11 Oct 2024 539th SURAJMITTAL 750 84 18ms 17 Dec 2024 539th simplylu 750 84 18ms 5 Jan 2025 539th WillowWispy 750 84 19ms 14 Mar 2025 539th VedJosh 750 84 25ms 3 May 2025 539th hetz2625 750 84 23ms 4 May 2025 539th ottav14 750 84 22ms 10 days ago 550th aazuspan 741 85 23ms 15 Jun 2022 550th myleopard 741 85 21ms 20 Jul 2022 550th LukasFolwarczny 🇨🇿 741 85 22ms 16 Sep 2022 550th SB-945 741 85 22ms 7 Feb 2024 550th aaardwark 741 85 21ms 1 Jun 2025 550th kmathis22 741 85 19ms 10 Sep 2025 556th MichaelMBradley 🇨🇦 733 86 22ms 5 Jun 2022 556th Lemonz-13223 733 86 17ms 21 Sep 2022 556th Bodo171 733 86 24ms 24 Nov 2022 556th shibacho 🇯🇵 733 86 19ms 25 Nov 2022 556th Vaekor 733 86 20ms 9 Jul 2023 556th LeoVanderSteege 733 86 16ms 18 Nov 2023 556th Pale-Vessel 733 86 18ms 18 Dec 2023 556th tik25 733 86 27ms 28 Mar 2024 556th willschremmer 733 86 16ms 27 Apr 2024 556th jamiloBBKing 733 86 24ms 27 Jan 2025 556th AsishKunta 733 86 17ms 1 Apr 2025 556th Hemanthred2005 733 86 18ms 1 Apr 2025 556th Voltrifrodec 🇸🇰 733 86 22ms 19 Apr 2025 556th lurey99 733 86 17ms 23 Apr 2025 556th Alban-Boissard 733 86 23ms 14 Jun 2025 556th Arkadios200 733 86 25ms 21 Sep 2025 556th Andrey2001 733 86 24ms 14 days ago 573rd ToE42 724 87 17ms 19 Oct 2022 573rd omri2001 724 87 22ms 19 Oct 2022 573rd Skallos-s 724 87 22ms 5 Dec 2022 573rd damoc1es 724 87 16ms 16 Apr 2023 573rd michelebastione 🇮🇹 724 87 25ms 20 Dec 2023 573rd clampcorder 724 87 17ms 24 Jan 2024 573rd GitQuick 724 87 20ms 23 Feb 2024 573rd EricSchraf 724 87 18ms 21 Mar 2024 573rd salvatore-abello 724 87 20ms 5 Sep 2024 573rd PotatoSaladOverlord 724 87 19ms 21 May 2025 573rd Ibozz91 724 87 23ms 8 Jun 2025 573rd Aquateraneal 724 87 17ms 13 Nov 2025 585th Andre3582 716 88 16ms 29 Oct 2022 585th Darknova2468 716 88 19ms 20 Nov 2022 585th Solsticely 716 88 19ms 20 Nov 2022 585th goGuru 716 88 19ms 21 Dec 2022 585th msbranicky 716 88 34ms 9 Aug 2023 585th gussy420 716 88 17ms 28 Oct 2023 585th Shynif 716 88 18ms 21 Feb 2024 585th asterized 716 88 20ms 24 Aug 2024 585th hippopotam00sehead 🇨🇦 716 88 19ms 11 Sep 2024 585th 08jne01 716 88 16ms 21 Nov 2024 585th davidludwik2370 716 88 19ms 14 Sep 2025 596th lovernj 708 89 23ms 23 Aug 2022 596th Roj 708 89 22ms 20 Nov 2022 596th aeonsablaze 708 89 16ms 22 Nov 2022 596th buddyw 708 89 16ms 9 Mar 2023 596th VV1Git 708 89 19ms 28 Mar 2023 First Prev 526–600 of 809 Next Last