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 633rd TheAtrossian 708 89 23ms 5 Jan 2025 633rd KimJua41 708 89 20ms 4 May 2025 633rd Nathan-Masala 708 89 30ms 2 days ago 644th StoverGitHub 700 90 22ms 16 Jun 2022 644th jamespeilunli 700 90 24ms 4 Jul 2022 644th TrentGlimp 700 90 20ms 3 Sep 2022 644th Ugoran 700 90 20ms 19 Nov 2022 644th PATTRIM 700 90 19ms 5 Jan 2023 644th charliegaming 700 90 19ms 3 Oct 2023 644th lhulinsky 700 90 19ms 22 Oct 2024 644th bthalheim 700 90 22ms 6 Dec 2024 644th nooby31415 700 90 20ms 18 Apr 2025 644th SinArieh 700 90 25ms 4 May 2025 644th islptng 700 90 23ms 7 Jul 2025 644th Mr-McChicken 700 90 18ms 4 Oct 2025 644th NoneTheFewer 700 90 20ms 4 Dec 2025 657th AbelPelser 692 91 23ms 3 Jul 2022 657th Seis 692 91 18ms 9 Dec 2022 657th r-i-c-e 692 91 21ms 9 Jul 2023 657th joshcors 692 91 17ms 30 Jun 2024 657th resoNathan 692 91 16ms 9 Jul 2024 657th jameswmccarty 692 91 21ms 24 Sep 2024 657th hamilton-bonds 692 91 19ms 12 Nov 2024 657th Wonamm 692 91 28ms 14 Feb 2025 665th TimLeffke 685 92 22ms 17 Aug 2022 665th Rythoka 685 92 17ms 17 Oct 2022 665th UriyaBA 685 92 16ms 19 Mar 2023 665th VladislavGitter 🇪🇸 685 92 19ms 14 Nov 2023 665th ridingqwerty 🇺🇸 685 92 16ms 22 Dec 2023 665th Thonoton 685 92 19ms 1 Feb 2024 665th OCNeve 685 92 19ms 17 Jun 2024 665th themoonisacheese 685 92 24ms 25 Feb 2025 665th BabySharkHi 685 92 21ms 22 Apr 2025 665th arjunarya1 685 92 17ms 28 Aug 2025 665th TJK-S 685 92 22ms 10 Oct 2025 676th Bananapants22 677 93 27ms 4 Sep 2022 676th jaxmattfair 🇺🇸 677 93 18ms 10 Jan 2023 676th cingulataluke 677 93 21ms 27 Aug 2023 676th fenix-bear 677 93 20ms 18 Nov 2023 676th epic-programmer-guy 677 93 23ms 22 Dec 2023 676th brimstonetrader 677 93 26ms 18 Nov 2024 676th HunterC14 677 93 28ms 10 Feb 2026 683rd atazzam 🇺🇸 670 94 18ms 18 May 2022 683rd rohangpta 670 94 16ms 8 Aug 2022 683rd shinylego 670 94 24ms 14 Sep 2022 683rd sgaltair 670 94 19ms 4 Nov 2022 683rd TotoAJ 670 94 19ms 15 Dec 2023 683rd Gusic06 670 94 19ms 6 May 2024 683rd kyleyarwood 670 94 23ms 6 Oct 2024 683rd jj0786-cell 670 94 22ms 1 Apr 2025 683rd griffinschreiber 670 94 27ms 1 Apr 2025 683rd o800 670 94 18ms 17 Nov 2025 693rd felixcroc 663 95 20ms 30 Mar 2023 693rd Pyro569 663 95 20ms 4 Jul 2023 693rd rm-rf-innocence 663 95 20ms 19 Dec 2023 693rd Bit125 663 95 21ms 30 Jan 2024 693rd aalec 663 95 23ms 25 Apr 2024 693rd strogor 663 95 20ms 13 Jun 2025 693rd cthierfelder 🇲🇨 663 95 20ms 17 Jul 2025 693rd ThomasDelepine 663 95 23ms 29 Oct 2025 693rd professor-l 663 95 16ms 8 days ago 702nd karhuthebear 656 96 23ms 9 May 2022 702nd qwjhvbxi 656 96 23ms 6 Feb 2024 702nd alfonsoalves 656 96 19ms 21 Jul 2024 702nd jeff-re 656 96 18ms 1 Apr 2025 706th a-penton 649 97 16ms 22 Sep 2022 706th jrbud 649 97 19ms 6 Jan 2024 706th befoster 649 97 22ms 22 Feb 2024 706th joshua-el-samalouti 🇩🇪 649 97 20ms 26 May 2024 706th luca1339 649 97 19ms 10 Jun 2024 711th lukemalek 643 98 15ms 10 Oct 2022 711th UltimateGuy0987 643 98 20ms 14 Oct 2022 711th TheLazySquid 643 98 20ms 20 Dec 2022 711th StronkCheese 🇺🇸 643 98 21ms 13 Mar 2023 711th Anthony-Williams-06 643 98 27ms 17 Oct 2023 711th abcdhhhh 643 98 15ms 27 Aug 2024 711th OSYCh314 🇦🇺 643 98 26ms 16 Nov 2024 711th cole-wilson 643 98 18ms 9 Dec 2024 711th Akilles1 643 98 20ms 15 May 2025 711th Hyperoplex145 643 98 20ms 11 Nov 2025 First Prev 641–720 of 848 Next Last