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 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 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 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 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 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 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 550th benanlam 750 84 20ms 24 Dec 2025 562nd aazuspan 741 85 19ms 15 Jun 2022 562nd myleopard 741 85 23ms 20 Jul 2022 562nd LukasFolwarczny 🇨🇿 741 85 25ms 16 Sep 2022 562nd SB-945 741 85 24ms 7 Feb 2024 562nd aaardwark 741 85 21ms 1 Jun 2025 562nd kmathis22 741 85 20ms 10 Sep 2025 568th MichaelMBradley 🇨🇦 733 86 25ms 5 Jun 2022 568th Lemonz-13223 733 86 22ms 21 Sep 2022 568th Bodo171 733 86 24ms 24 Nov 2022 568th shibacho 🇯🇵 733 86 19ms 25 Nov 2022 568th Vaekor 733 86 18ms 9 Jul 2023 568th LeoVanderSteege 733 86 18ms 18 Nov 2023 568th Pale-Vessel 733 86 20ms 18 Dec 2023 568th tik25 733 86 25ms 28 Mar 2024 568th willschremmer 733 86 16ms 27 Apr 2024 568th jamiloBBKing 733 86 26ms 27 Jan 2025 568th AsishKunta 733 86 19ms 1 Apr 2025 568th Hemanthred2005 733 86 18ms 1 Apr 2025 568th Voltrifrodec 🇸🇰 733 86 23ms 19 Apr 2025 568th lurey99 733 86 18ms 23 Apr 2025 568th Alban-Boissard 733 86 25ms 14 Jun 2025 568th Arkadios200 733 86 26ms 21 Sep 2025 568th Andrey2001 733 86 27ms 27 Nov 2025 585th ToE42 724 87 21ms 19 Oct 2022 585th omri2001 724 87 19ms 19 Oct 2022 585th Skallos-s 724 87 23ms 5 Dec 2022 585th damoc1es 724 87 19ms 16 Apr 2023 585th michelebastione 🇮🇹 724 87 27ms 20 Dec 2023 585th clampcorder 724 87 19ms 24 Jan 2024 585th GitQuick 724 87 19ms 23 Feb 2024 585th EricSchraf 724 87 18ms 21 Mar 2024 585th salvatore-abello 724 87 22ms 5 Sep 2024 585th PotatoSaladOverlord 724 87 19ms 21 May 2025 585th Ibozz91 724 87 24ms 8 Jun 2025 585th Aquateraneal 724 87 20ms 13 Nov 2025 597th Andre3582 716 88 17ms 29 Oct 2022 597th Darknova2468 716 88 22ms 20 Nov 2022 597th Solsticely 716 88 20ms 20 Nov 2022 597th goGuru 716 88 20ms 21 Dec 2022 597th msbranicky 716 88 37ms 9 Aug 2023 597th gussy420 716 88 17ms 28 Oct 2023 597th Shynif 716 88 20ms 21 Feb 2024 597th asterized 716 88 19ms 24 Aug 2024 597th hippopotam00sehead 🇨🇦 716 88 19ms 11 Sep 2024 597th 08jne01 716 88 16ms 21 Nov 2024 597th davidludwik2370 716 88 19ms 14 Sep 2025 608th lovernj 708 89 25ms 23 Aug 2022 608th Roj 708 89 21ms 20 Nov 2022 608th aeonsablaze 708 89 16ms 22 Nov 2022 608th buddyw 708 89 20ms 9 Mar 2023 608th VV1Git 708 89 19ms 28 Mar 2023 608th dranjohn 708 89 19ms 17 Sep 2023 608th ArenaGrenade 708 89 24ms 19 Feb 2024 608th NanduBC 708 89 22ms 6 Sep 2024 608th TheAtrossian 708 89 21ms 5 Jan 2025 608th KimJua41 708 89 21ms 4 May 2025 608th muser-logiccpu 🇺🇦 708 89 17ms 20 Aug 2025 619th StoverGitHub 700 90 20ms 16 Jun 2022 619th jamespeilunli 700 90 25ms 4 Jul 2022 619th TrentGlimp 700 90 20ms 3 Sep 2022 619th Ugoran 700 90 20ms 19 Nov 2022 619th PATTRIM 700 90 18ms 5 Jan 2023 619th charliegaming 700 90 20ms 3 Oct 2023 619th lhulinsky 700 90 20ms 22 Oct 2024 619th bthalheim 700 90 23ms 6 Dec 2024 619th nooby31415 700 90 19ms 18 Apr 2025 619th SinArieh 700 90 27ms 4 May 2025 619th islptng 700 90 23ms 7 Jul 2025 619th Mr-McChicken 700 90 18ms 4 Oct 2025 619th NoneTheFewer 700 90 24ms 4 Dec 2025 632nd AbelPelser 692 91 22ms 3 Jul 2022 632nd Seis 692 91 19ms 9 Dec 2022 632nd r-i-c-e 692 91 20ms 9 Jul 2023 632nd joshcors 692 91 17ms 30 Jun 2024 632nd resoNathan 692 91 17ms 9 Jul 2024 632nd jameswmccarty 692 91 22ms 24 Sep 2024 632nd hamilton-bonds 692 91 18ms 12 Nov 2024 632nd Wonamm 692 91 30ms 14 Feb 2025 640th TimLeffke 685 92 22ms 17 Aug 2022 First Prev 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