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 596th dranjohn 708 89 20ms 17 Sep 2023 596th ArenaGrenade 708 89 24ms 19 Feb 2024 596th NanduBC 708 89 21ms 6 Sep 2024 596th TheAtrossian 708 89 20ms 5 Jan 2025 596th KimJua41 708 89 19ms 4 May 2025 596th Upload-and-View 🇺🇦 708 89 16ms 20 Aug 2025 607th StoverGitHub 700 90 22ms 16 Jun 2022 607th jamespeilunli 700 90 26ms 4 Jul 2022 607th TrentGlimp 700 90 19ms 3 Sep 2022 607th Ugoran 700 90 18ms 19 Nov 2022 607th PATTRIM 700 90 17ms 5 Jan 2023 607th charliegaming 700 90 18ms 3 Oct 2023 607th lhulinsky 700 90 21ms 22 Oct 2024 607th bthalheim 700 90 23ms 6 Dec 2024 607th nooby31415 700 90 19ms 18 Apr 2025 607th SinArieh 700 90 23ms 4 May 2025 607th islptng 700 90 22ms 7 Jul 2025 607th Mr-McChicken 700 90 16ms 4 Oct 2025 607th NoneTheFewer 700 90 18ms 7 days ago 620th AbelPelser 692 91 20ms 3 Jul 2022 620th Seis 692 91 18ms 9 Dec 2022 620th r-i-c-e 692 91 19ms 9 Jul 2023 620th joshcors 692 91 16ms 30 Jun 2024 620th resoNathan 692 91 16ms 9 Jul 2024 620th jameswmccarty 692 91 21ms 24 Sep 2024 620th hamilton-bonds 692 91 17ms 12 Nov 2024 620th Wonamm 692 91 26ms 14 Feb 2025 628th TimLeffke 685 92 22ms 17 Aug 2022 628th Rythoka 685 92 14ms 17 Oct 2022 628th UriyaBA 685 92 16ms 19 Mar 2023 628th VladislavGitter 🇪🇸 685 92 18ms 14 Nov 2023 628th ridingqwerty 🇺🇸 685 92 17ms 22 Dec 2023 628th Thonoton 685 92 18ms 1 Feb 2024 628th OCNeve 685 92 19ms 17 Jun 2024 628th themoonisacheese 685 92 22ms 25 Feb 2025 628th BabySharkHi 685 92 20ms 22 Apr 2025 628th arjunarya1 685 92 16ms 28 Aug 2025 628th TJK-S 685 92 18ms 10 Oct 2025 639th Bananapants22 677 93 28ms 4 Sep 2022 639th jaxmattfair 🇺🇸 677 93 19ms 10 Jan 2023 639th cingulataluke 677 93 19ms 27 Aug 2023 639th fenix-bear 677 93 19ms 18 Nov 2023 639th epic-programmer-guy 677 93 23ms 22 Dec 2023 639th brimstonetrader 677 93 22ms 18 Nov 2024 645th atazzam 🇺🇸 670 94 17ms 18 May 2022 645th rohangpta 670 94 16ms 8 Aug 2022 645th shinylego 670 94 18ms 14 Sep 2022 645th sgaltair 670 94 20ms 4 Nov 2022 645th TotoAJ 670 94 19ms 15 Dec 2023 645th Gusic06 670 94 18ms 6 May 2024 645th kyleyarwood 670 94 20ms 6 Oct 2024 645th jj0786-cell 670 94 19ms 1 Apr 2025 645th griffinschreiber 670 94 19ms 1 Apr 2025 645th o800 670 94 17ms 24 days ago 655th felixcroc 663 95 18ms 30 Mar 2023 655th Pyro569 663 95 19ms 4 Jul 2023 655th rm-rf-innocence 663 95 19ms 19 Dec 2023 655th Bit125 663 95 19ms 30 Jan 2024 655th aalec 663 95 20ms 25 Apr 2024 655th strogor 663 95 19ms 13 Jun 2025 655th cthierfelder 🇲🇨 663 95 19ms 17 Jul 2025 655th ThomasDelepine 663 95 24ms 29 Oct 2025 663rd karhuthebear 656 96 24ms 9 May 2022 663rd qwjhvbxi 656 96 19ms 6 Feb 2024 663rd alfonsoalves 656 96 18ms 21 Jul 2024 663rd jeff-re 656 96 15ms 1 Apr 2025 667th a-penton 649 97 15ms 22 Sep 2022 667th jrbud 649 97 18ms 6 Jan 2024 667th befoster 649 97 23ms 22 Feb 2024 667th joshua-el-samalouti 🇩🇪 649 97 22ms 26 May 2024 667th luca1339 649 97 18ms 10 Jun 2024 672nd lukemalek 643 98 15ms 10 Oct 2022 672nd UltimateGuy0987 643 98 20ms 14 Oct 2022 672nd TheLazySquid 643 98 21ms 20 Dec 2022 672nd StronkCheese 🇺🇸 643 98 19ms 13 Mar 2023 First Prev 601–675 of 809 Next Last