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 NFA Simulator 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 NFA Simulator 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 594th NanduBC 708 89 20ms 6 Sep 2024 594th TheAtrossian 708 89 19ms 5 Jan 2025 594th KimJua41 708 89 19ms 4 May 2025 594th Upload-and-View 🇺🇦 708 89 27ms 20 Aug 2025 605th StoverGitHub 700 90 29ms 16 Jun 2022 605th jamespeilunli 700 90 23ms 4 Jul 2022 605th TrentGlimp 700 90 18ms 3 Sep 2022 605th Ugoran 700 90 20ms 19 Nov 2022 605th PATTRIM 700 90 16ms 5 Jan 2023 605th charliegaming 700 90 19ms 3 Oct 2023 605th lhulinsky 700 90 18ms 22 Oct 2024 605th bthalheim 700 90 21ms 6 Dec 2024 605th nooby31415 700 90 18ms 18 Apr 2025 605th SinArieh 700 90 24ms 4 May 2025 605th islptng 700 90 22ms 7 Jul 2025 605th Mr-McChicken 700 90 17ms 4 Oct 2025 617th AbelPelser 692 91 27ms 3 Jul 2022 617th Seis 692 91 20ms 9 Dec 2022 617th r-i-c-e 692 91 18ms 9 Jul 2023 617th joshcors 692 91 19ms 30 Jun 2024 617th resoNathan 692 91 16ms 9 Jul 2024 617th jameswmccarty 692 91 21ms 24 Sep 2024 617th hamilton-bonds 692 91 16ms 12 Nov 2024 617th Wonamm 692 91 26ms 14 Feb 2025 625th TimLeffke 685 92 26ms 17 Aug 2022 625th Rythoka 685 92 15ms 17 Oct 2022 625th UriyaBA 685 92 16ms 19 Mar 2023 625th VladislavGitter 🇪🇸 685 92 20ms 14 Nov 2023 625th ridingqwerty 🇺🇸 685 92 15ms 22 Dec 2023 625th Thonoton 685 92 19ms 1 Feb 2024 625th OCNeve 685 92 18ms 17 Jun 2024 625th themoonisacheese 685 92 22ms 25 Feb 2025 625th BabySharkHi 685 92 20ms 22 Apr 2025 625th arjunarya1 685 92 16ms 28 Aug 2025 625th TJK-S 685 92 19ms 10 Oct 2025 636th Bananapants22 677 93 26ms 4 Sep 2022 636th jaxmattfair 🇺🇸 677 93 18ms 10 Jan 2023 636th cingulataluke 677 93 18ms 27 Aug 2023 636th fenix-bear 677 93 19ms 18 Nov 2023 636th epic-programmer-guy 677 93 22ms 22 Dec 2023 636th brimstonetrader 677 93 22ms 18 Nov 2024 642nd atazzam 🇺🇸 670 94 17ms 18 May 2022 642nd rohangpta 670 94 16ms 8 Aug 2022 642nd shinylego 670 94 20ms 14 Sep 2022 642nd sgaltair 670 94 20ms 4 Nov 2022 642nd TotoAJ 670 94 17ms 15 Dec 2023 642nd Gusic06 670 94 18ms 6 May 2024 642nd kyleyarwood 670 94 20ms 6 Oct 2024 642nd jj0786-cell 670 94 18ms 1 Apr 2025 642nd griffinschreiber 670 94 19ms 1 Apr 2025 642nd o800 670 94 18ms 13 days ago 652nd felixcroc 663 95 19ms 30 Mar 2023 652nd Pyro569 663 95 18ms 4 Jul 2023 652nd rm-rf-innocence 663 95 19ms 19 Dec 2023 652nd Bit125 663 95 18ms 30 Jan 2024 652nd aalec 663 95 24ms 25 Apr 2024 652nd strogor 663 95 19ms 13 Jun 2025 652nd cthierfelder 🇲🇨 663 95 18ms 17 Jul 2025 652nd ThomasDelepine 663 95 21ms 29 Oct 2025 660th karhuthebear 656 96 23ms 9 May 2022 660th qwjhvbxi 656 96 20ms 6 Feb 2024 660th alfonsoalves 656 96 18ms 21 Jul 2024 660th jeff-re 656 96 14ms 1 Apr 2025 664th a-penton 649 97 19ms 22 Sep 2022 664th jrbud 649 97 18ms 6 Jan 2024 664th befoster 649 97 21ms 22 Feb 2024 664th joshua-el-samalouti 🇩🇪 649 97 18ms 26 May 2024 664th luca1339 649 97 18ms 10 Jun 2024 669th lukemalek 643 98 14ms 10 Oct 2022 669th UltimateGuy0987 643 98 18ms 14 Oct 2022 669th TheLazySquid 643 98 20ms 20 Dec 2022 669th StronkCheese 🇺🇸 643 98 28ms 13 Mar 2023 669th Anthony-Williams-06 643 98 27ms 17 Oct 2023 669th NoneTheFewer 643 98 21ms 17 May 2024 669th abcdhhhh 643 98 14ms 27 Aug 2024 First Prev 601–675 of 807 Next Last