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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 637th VV1Git 708 89 19ms 28 Mar 2023 637th dranjohn 708 89 21ms 17 Sep 2023 637th ArenaGrenade 708 89 25ms 19 Feb 2024 637th NanduBC 708 89 23ms 6 Sep 2024 637th TheAtrossian 708 89 23ms 5 Jan 2025 637th KimJua41 708 89 20ms 4 May 2025 637th Nathan-Masala 708 89 30ms 10 days ago 648th StoverGitHub 700 90 22ms 16 Jun 2022 648th jamespeilunli 700 90 24ms 4 Jul 2022 648th TrentGlimp 700 90 20ms 3 Sep 2022 648th Ugoran 700 90 20ms 19 Nov 2022 648th PATTRIM 700 90 19ms 5 Jan 2023 648th charliegaming 700 90 19ms 3 Oct 2023 648th lhulinsky 700 90 19ms 22 Oct 2024 648th bthalheim 700 90 22ms 6 Dec 2024 648th nooby31415 700 90 20ms 18 Apr 2025 648th SinArieh 700 90 25ms 4 May 2025 648th islptng 700 90 23ms 7 Jul 2025 648th Mr-McChicken 700 90 18ms 4 Oct 2025 648th NoneTheFewer 700 90 20ms 4 Dec 2025 661st AbelPelser 692 91 23ms 3 Jul 2022 661st Seis 692 91 18ms 9 Dec 2022 661st r-i-c-e 692 91 21ms 9 Jul 2023 661st joshcors 692 91 17ms 30 Jun 2024 661st resoNathan 692 91 16ms 9 Jul 2024 661st jameswmccarty 692 91 21ms 24 Sep 2024 661st hamilton-bonds 692 91 19ms 12 Nov 2024 661st Wonamm 692 91 28ms 14 Feb 2025 669th TimLeffke 685 92 22ms 17 Aug 2022 669th Rythoka 685 92 17ms 17 Oct 2022 669th UriyaBA 685 92 16ms 19 Mar 2023 669th VladislavGitter 🇪🇸 685 92 19ms 14 Nov 2023 669th ridingqwerty 🇺🇸 685 92 16ms 22 Dec 2023 669th Thonoton 685 92 19ms 1 Feb 2024 669th OCNeve 685 92 19ms 17 Jun 2024 669th themoonisacheese 685 92 24ms 25 Feb 2025 669th BabySharkHi 685 92 21ms 22 Apr 2025 669th arjunarya1 685 92 17ms 28 Aug 2025 669th TJK-S 685 92 22ms 10 Oct 2025 680th Bananapants22 677 93 27ms 4 Sep 2022 680th jaxmattfair 🇺🇸 677 93 18ms 10 Jan 2023 680th cingulataluke 677 93 21ms 27 Aug 2023 680th fenix-bear 677 93 20ms 18 Nov 2023 680th epic-programmer-guy 677 93 23ms 22 Dec 2023 680th brimstonetrader 677 93 26ms 18 Nov 2024 680th HunterC14 677 93 28ms 10 Feb 2026 687th atazzam 🇺🇸 670 94 18ms 18 May 2022 687th rohangpta 670 94 16ms 8 Aug 2022 687th shinylego 670 94 24ms 14 Sep 2022 687th sgaltair 670 94 19ms 4 Nov 2022 687th TotoAJ 670 94 19ms 15 Dec 2023 687th Gusic06 670 94 19ms 6 May 2024 687th kyleyarwood 670 94 23ms 6 Oct 2024 687th jj0786-cell 670 94 22ms 1 Apr 2025 687th griffinschreiber 670 94 27ms 1 Apr 2025 687th o800 670 94 18ms 17 Nov 2025 697th felixcroc 663 95 20ms 30 Mar 2023 697th Pyro569 663 95 20ms 4 Jul 2023 697th rm-rf-innocence 663 95 20ms 19 Dec 2023 697th Bit125 663 95 21ms 30 Jan 2024 697th aalec 663 95 23ms 25 Apr 2024 697th strogor 663 95 20ms 13 Jun 2025 697th cthierfelder 🇲🇨 663 95 20ms 17 Jul 2025 697th ThomasDelepine 663 95 23ms 29 Oct 2025 697th professor-l 663 95 16ms 17 days ago 706th karhuthebear 656 96 23ms 9 May 2022 706th qwjhvbxi 656 96 23ms 6 Feb 2024 706th alfonsoalves 656 96 19ms 21 Jul 2024 706th jeff-re 656 96 18ms 1 Apr 2025 710th a-penton 649 97 16ms 22 Sep 2022 710th jrbud 649 97 19ms 6 Jan 2024 710th befoster 649 97 22ms 22 Feb 2024 710th joshua-el-samalouti 🇩🇪 649 97 20ms 26 May 2024 710th luca1339 649 97 19ms 10 Jun 2024 715th lukemalek 643 98 15ms 10 Oct 2022 715th UltimateGuy0987 643 98 20ms 14 Oct 2022 715th TheLazySquid 643 98 20ms 20 Dec 2022 715th StronkCheese 🇺🇸 643 98 21ms 13 Mar 2023 715th Anthony-Williams-06 643 98 27ms 17 Oct 2023 715th abcdhhhh 643 98 15ms 27 Aug 2024 First Prev 641–720 of 852 Next Last