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 Dragon Curve 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 Dragon Curve 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 638th buddyw 708 89 16ms 9 Mar 2023 638th VV1Git 708 89 19ms 28 Mar 2023 638th dranjohn 708 89 21ms 17 Sep 2023 638th ArenaGrenade 708 89 25ms 19 Feb 2024 638th NanduBC 708 89 23ms 6 Sep 2024 638th TheAtrossian 708 89 23ms 5 Jan 2025 638th KimJua41 708 89 20ms 4 May 2025 638th Nathan-Masala 708 89 30ms 17 days ago 649th StoverGitHub 700 90 22ms 16 Jun 2022 649th jamespeilunli 700 90 24ms 4 Jul 2022 649th TrentGlimp 700 90 20ms 3 Sep 2022 649th Ugoran 700 90 20ms 19 Nov 2022 649th PATTRIM 700 90 19ms 5 Jan 2023 649th charliegaming 700 90 19ms 3 Oct 2023 649th lhulinsky 700 90 19ms 22 Oct 2024 649th bthalheim 700 90 22ms 6 Dec 2024 649th nooby31415 700 90 20ms 18 Apr 2025 649th SinArieh 700 90 25ms 4 May 2025 649th islptng 700 90 23ms 7 Jul 2025 649th Mr-McChicken 700 90 18ms 4 Oct 2025 649th NoneTheFewer 700 90 20ms 4 Dec 2025 662nd AbelPelser 692 91 23ms 3 Jul 2022 662nd Seis 692 91 18ms 9 Dec 2022 662nd r-i-c-e 692 91 21ms 9 Jul 2023 662nd joshcors 692 91 17ms 30 Jun 2024 662nd resoNathan 692 91 16ms 9 Jul 2024 662nd jameswmccarty 692 91 21ms 24 Sep 2024 662nd hamilton-bonds 692 91 19ms 12 Nov 2024 662nd Wonamm 692 91 28ms 14 Feb 2025 670th TimLeffke 685 92 22ms 17 Aug 2022 670th Rythoka 685 92 17ms 17 Oct 2022 670th UriyaBA 685 92 16ms 19 Mar 2023 670th VladislavGitter 🇪🇸 685 92 19ms 14 Nov 2023 670th ridingqwerty 🇺🇸 685 92 16ms 22 Dec 2023 670th Thonoton 685 92 19ms 1 Feb 2024 670th OCNeve 685 92 19ms 17 Jun 2024 670th themoonisacheese 685 92 24ms 25 Feb 2025 670th BabySharkHi 685 92 21ms 22 Apr 2025 670th arjunarya1 685 92 17ms 28 Aug 2025 670th TJK-S 685 92 22ms 10 Oct 2025 681st Bananapants22 677 93 27ms 4 Sep 2022 681st jaxmattfair 🇺🇸 677 93 18ms 10 Jan 2023 681st cingulataluke 677 93 21ms 27 Aug 2023 681st fenix-bear 677 93 20ms 18 Nov 2023 681st epic-programmer-guy 677 93 23ms 22 Dec 2023 681st brimstonetrader 677 93 26ms 18 Nov 2024 681st HunterC14 677 93 28ms 10 Feb 2026 688th atazzam 🇺🇸 670 94 18ms 18 May 2022 688th rohangpta 670 94 16ms 8 Aug 2022 688th shinylego 670 94 24ms 14 Sep 2022 688th sgaltair 670 94 19ms 4 Nov 2022 688th TotoAJ 670 94 19ms 15 Dec 2023 688th Gusic06 670 94 19ms 6 May 2024 688th kyleyarwood 670 94 23ms 6 Oct 2024 688th jj0786-cell 670 94 22ms 1 Apr 2025 688th griffinschreiber 670 94 27ms 1 Apr 2025 688th o800 670 94 18ms 17 Nov 2025 698th felixcroc 663 95 20ms 30 Mar 2023 698th Pyro569 663 95 20ms 4 Jul 2023 698th rm-rf-innocence 663 95 20ms 19 Dec 2023 698th Bit125 663 95 21ms 30 Jan 2024 698th aalec 663 95 23ms 25 Apr 2024 698th strogor 663 95 20ms 13 Jun 2025 698th cthierfelder 🇲🇨 663 95 20ms 17 Jul 2025 698th ThomasDelepine 663 95 23ms 29 Oct 2025 698th professor-l 663 95 16ms 24 days ago 707th karhuthebear 656 96 23ms 9 May 2022 707th qwjhvbxi 656 96 23ms 6 Feb 2024 707th alfonsoalves 656 96 19ms 21 Jul 2024 707th jeff-re 656 96 18ms 1 Apr 2025 711th a-penton 649 97 16ms 22 Sep 2022 711th jrbud 649 97 19ms 6 Jan 2024 711th befoster 649 97 22ms 22 Feb 2024 711th joshua-el-samalouti 🇩🇪 649 97 20ms 26 May 2024 711th luca1339 649 97 19ms 10 Jun 2024 716th lukemalek 643 98 15ms 10 Oct 2022 716th UltimateGuy0987 643 98 20ms 14 Oct 2022 716th TheLazySquid 643 98 20ms 20 Dec 2022 716th StronkCheese 🇺🇸 643 98 21ms 13 Mar 2023 716th Anthony-Williams-06 643 98 27ms 17 Oct 2023 First Prev 641–720 of 853 Next Last