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 ><> 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 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 554th WillowWispy 750 84 22ms 14 Mar 2025 554th VedJosh 750 84 26ms 3 May 2025 554th hetz2625 750 84 26ms 4 May 2025 554th ottav14 750 84 18ms 1 Dec 2025 554th benanlam 750 84 18ms 24 Dec 2025 566th aazuspan 741 85 19ms 15 Jun 2022 566th myleopard 741 85 23ms 20 Jul 2022 566th LukasFolwarczny 🇨🇿 741 85 23ms 16 Sep 2022 566th SB-945 741 85 24ms 7 Feb 2024 566th aaardwark 741 85 21ms 1 Jun 2025 566th kmathis22 741 85 20ms 10 Sep 2025 572nd MichaelMBradley 🇨🇦 733 86 25ms 5 Jun 2022 572nd Lemonz-13223 733 86 21ms 21 Sep 2022 572nd Bodo171 733 86 24ms 24 Nov 2022 572nd shibacho 🇯🇵 733 86 19ms 25 Nov 2022 572nd Vaekor 733 86 18ms 9 Jul 2023 572nd LeoVanderSteege 733 86 17ms 18 Nov 2023 572nd Pale-Vessel 733 86 20ms 18 Dec 2023 572nd tik25 733 86 24ms 28 Mar 2024 572nd willschremmer 733 86 16ms 27 Apr 2024 572nd jamiloBBKing 733 86 25ms 27 Jan 2025 572nd AsishKunta 733 86 18ms 1 Apr 2025 572nd Hemanthred2005 733 86 18ms 1 Apr 2025 572nd Voltrifrodec 🇸🇰 733 86 23ms 19 Apr 2025 572nd lurey99 733 86 18ms 23 Apr 2025 572nd Alban-Boissard 733 86 23ms 14 Jun 2025 572nd Arkadios200 733 86 26ms 21 Sep 2025 572nd Andrey2001 733 86 27ms 27 Nov 2025 589th ToE42 724 87 18ms 19 Oct 2022 589th omri2001 724 87 19ms 19 Oct 2022 589th Skallos-s 724 87 23ms 5 Dec 2022 589th damoc1es 724 87 19ms 16 Apr 2023 589th michelebastione 🇮🇹 724 87 25ms 20 Dec 2023 589th clampcorder 724 87 16ms 24 Jan 2024 589th GitQuick 724 87 19ms 23 Feb 2024 589th EricSchraf 724 87 18ms 21 Mar 2024 589th salvatore-abello 724 87 22ms 5 Sep 2024 589th PotatoSaladOverlord 724 87 19ms 21 May 2025 589th Ibozz91 724 87 23ms 8 Jun 2025 589th Aquateraneal 724 87 17ms 13 Nov 2025 589th chenyuan33 724 87 22ms 4 hours ago 602nd Andre3582 716 88 17ms 29 Oct 2022 602nd Darknova2468 716 88 20ms 20 Nov 2022 602nd Solsticely 716 88 20ms 20 Nov 2022 602nd goGuru 716 88 20ms 21 Dec 2022 602nd msbranicky 716 88 36ms 9 Aug 2023 602nd gussy420 716 88 17ms 28 Oct 2023 602nd Shynif 716 88 20ms 21 Feb 2024 602nd asterized 716 88 19ms 24 Aug 2024 602nd hippopotam00sehead 🇨🇦 716 88 19ms 11 Sep 2024 602nd 08jne01 716 88 16ms 21 Nov 2024 602nd davidludwik2370 716 88 19ms 14 Sep 2025 602nd SectorCorruptor 716 88 22ms 11 days ago 614th lovernj 708 89 24ms 23 Aug 2022 614th Roj 708 89 21ms 20 Nov 2022 614th aeonsablaze 708 89 16ms 22 Nov 2022 614th buddyw 708 89 18ms 9 Mar 2023 614th VV1Git 708 89 19ms 28 Mar 2023 614th dranjohn 708 89 19ms 17 Sep 2023 614th ArenaGrenade 708 89 24ms 19 Feb 2024 614th NanduBC 708 89 22ms 6 Sep 2024 614th TheAtrossian 708 89 19ms 5 Jan 2025 614th KimJua41 708 89 21ms 4 May 2025 614th muser-logiccpu 🇺🇦 708 89 17ms 20 Aug 2025 625th StoverGitHub 700 90 20ms 16 Jun 2022 625th jamespeilunli 700 90 23ms 4 Jul 2022 625th TrentGlimp 700 90 20ms 3 Sep 2022 625th Ugoran 700 90 20ms 19 Nov 2022 625th PATTRIM 700 90 17ms 5 Jan 2023 625th charliegaming 700 90 19ms 3 Oct 2023 625th lhulinsky 700 90 20ms 22 Oct 2024 625th bthalheim 700 90 21ms 6 Dec 2024 625th nooby31415 700 90 19ms 18 Apr 2025 625th SinArieh 700 90 25ms 4 May 2025 625th islptng 700 90 23ms 7 Jul 2025 625th Mr-McChicken 700 90 17ms 4 Oct 2025 625th NoneTheFewer 700 90 18ms 4 Dec 2025 638th AbelPelser 692 91 22ms 3 Jul 2022 638th Seis 692 91 19ms 9 Dec 2022 638th r-i-c-e 692 91 20ms 9 Jul 2023 First Prev 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