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 597th VV1Git 708 89 19ms 28 Mar 2023 597th dranjohn 708 89 20ms 17 Sep 2023 597th ArenaGrenade 708 89 24ms 19 Feb 2024 597th NanduBC 708 89 21ms 6 Sep 2024 597th TheAtrossian 708 89 20ms 5 Jan 2025 597th KimJua41 708 89 19ms 4 May 2025 597th Upload-and-View 🇺🇦 708 89 16ms 20 Aug 2025 608th StoverGitHub 700 90 22ms 16 Jun 2022 608th jamespeilunli 700 90 26ms 4 Jul 2022 608th TrentGlimp 700 90 19ms 3 Sep 2022 608th Ugoran 700 90 18ms 19 Nov 2022 608th PATTRIM 700 90 17ms 5 Jan 2023 608th charliegaming 700 90 18ms 3 Oct 2023 608th lhulinsky 700 90 21ms 22 Oct 2024 608th bthalheim 700 90 23ms 6 Dec 2024 608th nooby31415 700 90 19ms 18 Apr 2025 608th SinArieh 700 90 23ms 4 May 2025 608th islptng 700 90 22ms 7 Jul 2025 608th Mr-McChicken 700 90 16ms 4 Oct 2025 608th NoneTheFewer 700 90 18ms 12 days ago 621st AbelPelser 692 91 20ms 3 Jul 2022 621st Seis 692 91 18ms 9 Dec 2022 621st r-i-c-e 692 91 19ms 9 Jul 2023 621st joshcors 692 91 16ms 30 Jun 2024 621st resoNathan 692 91 16ms 9 Jul 2024 621st jameswmccarty 692 91 21ms 24 Sep 2024 621st hamilton-bonds 692 91 17ms 12 Nov 2024 621st Wonamm 692 91 26ms 14 Feb 2025 629th TimLeffke 685 92 22ms 17 Aug 2022 629th Rythoka 685 92 14ms 17 Oct 2022 629th UriyaBA 685 92 16ms 19 Mar 2023 629th VladislavGitter 🇪🇸 685 92 18ms 14 Nov 2023 629th ridingqwerty 🇺🇸 685 92 17ms 22 Dec 2023 629th Thonoton 685 92 18ms 1 Feb 2024 629th OCNeve 685 92 19ms 17 Jun 2024 629th themoonisacheese 685 92 22ms 25 Feb 2025 629th BabySharkHi 685 92 20ms 22 Apr 2025 629th arjunarya1 685 92 16ms 28 Aug 2025 629th TJK-S 685 92 18ms 10 Oct 2025 640th Bananapants22 677 93 28ms 4 Sep 2022 640th jaxmattfair 🇺🇸 677 93 19ms 10 Jan 2023 640th cingulataluke 677 93 19ms 27 Aug 2023 640th fenix-bear 677 93 19ms 18 Nov 2023 640th epic-programmer-guy 677 93 23ms 22 Dec 2023 640th brimstonetrader 677 93 22ms 18 Nov 2024 646th atazzam 🇺🇸 670 94 17ms 18 May 2022 646th rohangpta 670 94 16ms 8 Aug 2022 646th shinylego 670 94 18ms 14 Sep 2022 646th sgaltair 670 94 20ms 4 Nov 2022 646th TotoAJ 670 94 19ms 15 Dec 2023 646th Gusic06 670 94 18ms 6 May 2024 646th kyleyarwood 670 94 20ms 6 Oct 2024 646th jj0786-cell 670 94 19ms 1 Apr 2025 646th griffinschreiber 670 94 19ms 1 Apr 2025 646th o800 670 94 17ms 17 Nov 2025 656th felixcroc 663 95 18ms 30 Mar 2023 656th Pyro569 663 95 19ms 4 Jul 2023 656th rm-rf-innocence 663 95 19ms 19 Dec 2023 656th Bit125 663 95 19ms 30 Jan 2024 656th aalec 663 95 20ms 25 Apr 2024 656th strogor 663 95 19ms 13 Jun 2025 656th cthierfelder 🇲🇨 663 95 19ms 17 Jul 2025 656th ThomasDelepine 663 95 24ms 29 Oct 2025 664th karhuthebear 656 96 24ms 9 May 2022 664th qwjhvbxi 656 96 19ms 6 Feb 2024 664th alfonsoalves 656 96 18ms 21 Jul 2024 664th jeff-re 656 96 15ms 1 Apr 2025 668th a-penton 649 97 15ms 22 Sep 2022 668th jrbud 649 97 18ms 6 Jan 2024 668th befoster 649 97 23ms 22 Feb 2024 668th joshua-el-samalouti 🇩🇪 649 97 22ms 26 May 2024 668th luca1339 649 97 18ms 10 Jun 2024 673rd lukemalek 643 98 15ms 10 Oct 2022 673rd UltimateGuy0987 643 98 20ms 14 Oct 2022 673rd TheLazySquid 643 98 21ms 20 Dec 2022 First Prev 601–675 of 810 Next Last