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 595th ArenaGrenade 708 89 22ms 19 Feb 2024 595th NanduBC 708 89 21ms 6 Sep 2024 595th TheAtrossian 708 89 19ms 5 Jan 2025 595th KimJua41 708 89 18ms 4 May 2025 595th Upload-and-View 🇺🇦 708 89 16ms 20 Aug 2025 606th StoverGitHub 700 90 19ms 16 Jun 2022 606th jamespeilunli 700 90 22ms 4 Jul 2022 606th TrentGlimp 700 90 18ms 3 Sep 2022 606th Ugoran 700 90 18ms 19 Nov 2022 606th PATTRIM 700 90 16ms 5 Jan 2023 606th charliegaming 700 90 18ms 3 Oct 2023 606th lhulinsky 700 90 18ms 22 Oct 2024 606th bthalheim 700 90 21ms 6 Dec 2024 606th nooby31415 700 90 17ms 18 Apr 2025 606th SinArieh 700 90 23ms 4 May 2025 606th islptng 700 90 22ms 7 Jul 2025 606th Mr-McChicken 700 90 16ms 4 Oct 2025 618th AbelPelser 692 91 21ms 3 Jul 2022 618th Seis 692 91 19ms 9 Dec 2022 618th r-i-c-e 692 91 18ms 9 Jul 2023 618th joshcors 692 91 16ms 30 Jun 2024 618th resoNathan 692 91 15ms 9 Jul 2024 618th jameswmccarty 692 91 22ms 24 Sep 2024 618th hamilton-bonds 692 91 16ms 12 Nov 2024 618th Wonamm 692 91 29ms 14 Feb 2025 626th TimLeffke 685 92 21ms 17 Aug 2022 626th Rythoka 685 92 14ms 17 Oct 2022 626th UriyaBA 685 92 17ms 19 Mar 2023 626th VladislavGitter 🇪🇸 685 92 18ms 14 Nov 2023 626th ridingqwerty 🇺🇸 685 92 17ms 22 Dec 2023 626th Thonoton 685 92 19ms 1 Feb 2024 626th OCNeve 685 92 19ms 17 Jun 2024 626th themoonisacheese 685 92 23ms 25 Feb 2025 626th BabySharkHi 685 92 24ms 22 Apr 2025 626th arjunarya1 685 92 18ms 28 Aug 2025 626th TJK-S 685 92 20ms 10 Oct 2025 637th Bananapants22 677 93 25ms 4 Sep 2022 637th jaxmattfair 🇺🇸 677 93 17ms 10 Jan 2023 637th cingulataluke 677 93 18ms 27 Aug 2023 637th fenix-bear 677 93 18ms 18 Nov 2023 637th epic-programmer-guy 677 93 22ms 22 Dec 2023 637th brimstonetrader 677 93 23ms 18 Nov 2024 643rd atazzam 🇺🇸 670 94 17ms 18 May 2022 643rd rohangpta 670 94 15ms 8 Aug 2022 643rd shinylego 670 94 18ms 14 Sep 2022 643rd sgaltair 670 94 20ms 4 Nov 2022 643rd TotoAJ 670 94 22ms 15 Dec 2023 643rd Gusic06 670 94 19ms 6 May 2024 643rd kyleyarwood 670 94 21ms 6 Oct 2024 643rd jj0786-cell 670 94 18ms 1 Apr 2025 643rd griffinschreiber 670 94 18ms 1 Apr 2025 643rd o800 670 94 18ms 16 days ago 653rd felixcroc 663 95 18ms 30 Mar 2023 653rd Pyro569 663 95 19ms 4 Jul 2023 653rd rm-rf-innocence 663 95 20ms 19 Dec 2023 653rd Bit125 663 95 18ms 30 Jan 2024 653rd aalec 663 95 21ms 25 Apr 2024 653rd strogor 663 95 18ms 13 Jun 2025 653rd cthierfelder 🇲🇨 663 95 18ms 17 Jul 2025 653rd ThomasDelepine 663 95 23ms 29 Oct 2025 661st karhuthebear 656 96 23ms 9 May 2022 661st qwjhvbxi 656 96 19ms 6 Feb 2024 661st alfonsoalves 656 96 18ms 21 Jul 2024 661st jeff-re 656 96 14ms 1 Apr 2025 665th a-penton 649 97 16ms 22 Sep 2022 665th jrbud 649 97 17ms 6 Jan 2024 665th befoster 649 97 21ms 22 Feb 2024 665th joshua-el-samalouti 🇩🇪 649 97 19ms 26 May 2024 665th luca1339 649 97 20ms 10 Jun 2024 670th lukemalek 643 98 14ms 10 Oct 2022 670th UltimateGuy0987 643 98 19ms 14 Oct 2022 670th TheLazySquid 643 98 20ms 20 Dec 2022 670th StronkCheese 🇺🇸 643 98 19ms 13 Mar 2023 670th Anthony-Williams-06 643 98 25ms 17 Oct 2023 670th NoneTheFewer 643 98 18ms 17 May 2024 First Prev 601–675 of 808 Next Last