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 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 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 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 Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 559th mhsaul 750 84 18ms 11 Apr 2023 559th Phyisis 750 84 23ms 30 Apr 2024 559th MaxCastella 🇫🇷 750 84 23ms 11 Oct 2024 559th SURAJMITTAL 750 84 17ms 17 Dec 2024 559th simplylu 750 84 19ms 5 Jan 2025 559th WillowWispy 750 84 22ms 14 Mar 2025 559th VedJosh 750 84 26ms 3 May 2025 559th hetz2625 750 84 26ms 4 May 2025 559th ottav14 750 84 18ms 1 Dec 2025 559th benanlam 750 84 18ms 24 Dec 2025 559th pph-2203 750 84 16ms 2 days ago 572nd aazuspan 741 85 19ms 15 Jun 2022 572nd myleopard 741 85 23ms 20 Jul 2022 572nd LukasFolwarczny 🇨🇿 741 85 23ms 16 Sep 2022 572nd SB-945 741 85 24ms 7 Feb 2024 572nd aaardwark 741 85 21ms 1 Jun 2025 572nd kmathis22 741 85 20ms 10 Sep 2025 578th MichaelMBradley 🇨🇦 733 86 25ms 5 Jun 2022 578th Lemonz-13223 733 86 21ms 21 Sep 2022 578th Bodo171 733 86 24ms 24 Nov 2022 578th shibacho 🇯🇵 733 86 19ms 25 Nov 2022 578th Vaekor 733 86 18ms 9 Jul 2023 578th LeoVanderSteege 733 86 17ms 18 Nov 2023 578th Pale-Vessel 733 86 20ms 18 Dec 2023 578th tik25 733 86 24ms 28 Mar 2024 578th willschremmer 733 86 16ms 27 Apr 2024 578th jamiloBBKing 733 86 25ms 27 Jan 2025 578th AsishKunta 733 86 18ms 1 Apr 2025 578th Hemanthred2005 733 86 18ms 1 Apr 2025 578th Voltrifrodec 🇸🇰 733 86 23ms 19 Apr 2025 578th lurey99 733 86 18ms 23 Apr 2025 578th Alban-Boissard 733 86 23ms 14 Jun 2025 578th Arkadios200 733 86 26ms 21 Sep 2025 578th Andrey2001 733 86 27ms 27 Nov 2025 595th ToE42 724 87 18ms 19 Oct 2022 595th omri2001 724 87 19ms 19 Oct 2022 595th Skallos-s 724 87 23ms 5 Dec 2022 595th damoc1es 724 87 19ms 16 Apr 2023 595th michelebastione 🇮🇹 724 87 25ms 20 Dec 2023 595th clampcorder 724 87 16ms 24 Jan 2024 595th GitQuick 724 87 19ms 23 Feb 2024 595th EricSchraf 724 87 18ms 21 Mar 2024 595th salvatore-abello 724 87 22ms 5 Sep 2024 595th PotatoSaladOverlord 724 87 19ms 21 May 2025 595th Ibozz91 724 87 23ms 8 Jun 2025 595th Aquateraneal 724 87 17ms 13 Nov 2025 595th chenyuan33 724 87 22ms 7 days ago 608th Andre3582 716 88 17ms 29 Oct 2022 608th Darknova2468 716 88 20ms 20 Nov 2022 608th Solsticely 716 88 20ms 20 Nov 2022 608th goGuru 716 88 20ms 21 Dec 2022 608th msbranicky 716 88 36ms 9 Aug 2023 608th gussy420 716 88 17ms 28 Oct 2023 608th Shynif 716 88 20ms 21 Feb 2024 608th asterized 716 88 19ms 24 Aug 2024 608th hippopotam00sehead 🇨🇦 716 88 19ms 11 Sep 2024 608th 08jne01 716 88 16ms 21 Nov 2024 608th davidludwik2370 716 88 19ms 14 Sep 2025 608th SectorCorruptor 716 88 22ms 18 days ago 620th lovernj 708 89 24ms 23 Aug 2022 620th Roj 708 89 21ms 20 Nov 2022 620th aeonsablaze 708 89 16ms 22 Nov 2022 620th buddyw 708 89 18ms 9 Mar 2023 620th VV1Git 708 89 19ms 28 Mar 2023 620th dranjohn 708 89 19ms 17 Sep 2023 620th ArenaGrenade 708 89 24ms 19 Feb 2024 620th NanduBC 708 89 22ms 6 Sep 2024 620th TheAtrossian 708 89 19ms 5 Jan 2025 620th KimJua41 708 89 21ms 4 May 2025 630th StoverGitHub 700 90 20ms 16 Jun 2022 630th jamespeilunli 700 90 23ms 4 Jul 2022 630th TrentGlimp 700 90 20ms 3 Sep 2022 630th Ugoran 700 90 20ms 19 Nov 2022 630th PATTRIM 700 90 17ms 5 Jan 2023 630th charliegaming 700 90 19ms 3 Oct 2023 630th lhulinsky 700 90 20ms 22 Oct 2024 630th bthalheim 700 90 21ms 6 Dec 2024 630th nooby31415 700 90 19ms 18 Apr 2025 630th SinArieh 700 90 25ms 4 May 2025 630th islptng 700 90 23ms 7 Jul 2025 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