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 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 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 Apéry’s Constant Binary Lambda Calculus 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 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 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 Apéry’s Constant Binary Lambda Calculus 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 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 370th Mathrew2012 829 76 18ms 9 Nov 2024 370th kawrei 829 76 27ms 4 May 2025 370th RaBa21 🇭🇺 829 76 27ms 19 Jul 2025 370th mathieurodic 829 76 26ms 21 Oct 2025 370th DrakeSeteraO 829 76 53ms 24 Oct 2025 370th yoikolover 829 76 23ms 11 Dec 2025 370th matricronia 829 76 27ms 23 days ago 370th RodAlc24 🇪🇸 829 76 20ms 2 hours ago 409th cooljoseph1 818 77 24ms 6 May 2022 409th krcs 🇵🇱 818 77 22ms 11 May 2022 409th kenballus 818 77 24ms 13 Jul 2022 409th 104210 818 77 25ms 29 Jul 2022 409th andre-de-lorde 818 77 21ms 1 Sep 2022 409th zstephe 818 77 26ms 2 Dec 2022 409th badboj40 818 77 24ms 27 Dec 2022 409th henrytranter 818 77 26ms 11 Jan 2023 409th DragonaireM 818 77 22ms 6 Feb 2023 409th steffan-polygolf 818 77 19ms 19 Feb 2023 409th kellantech 818 77 19ms 21 May 2023 409th Ty-Cyr 818 77 19ms 14 Jul 2023 409th camieac 🇬🇧 818 77 23ms 14 Jul 2023 409th nathsou 🇫🇷 818 77 22ms 2 Sep 2023 409th MisterrLuck 818 77 23ms 7 Sep 2023 409th alexjurkiewicz 🇦🇺 818 77 20ms 7 Nov 2023 409th askipio 818 77 23ms 22 Nov 2023 409th trinityy-7 818 77 24ms 17 Dec 2023 409th zwxzwxzwx21 818 77 23ms 30 Jan 2024 409th PyryL 🇫🇮 818 77 20ms 23 Aug 2024 409th CyberTapir 818 77 24ms 27 Aug 2024 409th junten1 818 77 23ms 20 Oct 2024 409th croc54 818 77 26ms 24 Dec 2024 409th za3k 818 77 24ms 3 Jun 2025 409th robin-scragg 818 77 19ms 17 Aug 2025 409th j-zhang43 818 77 23ms 17 Nov 2025 435th AGoyet 808 78 25ms 29 Jul 2022 435th RYNO8 808 78 23ms 16 Aug 2022 435th TheCod-r 🇦🇶 808 78 27ms 28 Sep 2022 435th Marthe-CC 808 78 22ms 9 Oct 2022 435th Wildst 808 78 19ms 2 Nov 2022 435th nmgetahun 808 78 22ms 4 Dec 2022 435th Techdude01 808 78 24ms 13 Dec 2022 435th tvcv901 808 78 19ms 22 Mar 2023 435th oceko 808 78 21ms 24 Mar 2023 435th yoyoyonono 808 78 26ms 15 May 2023 435th Nic0M 808 78 22ms 13 Aug 2023 435th ssbhatt4321 808 78 25ms 14 Oct 2023 435th wyarde 808 78 19ms 7 Nov 2023 435th ItsEthanDev 808 78 19ms 24 Dec 2023 435th adamreidsmith 808 78 26ms 16 Feb 2024 435th Jacob385 808 78 60ms 5 Mar 2024 435th DGipe 808 78 22ms 13 May 2024 435th cyxv 808 78 27ms 2 Aug 2024 435th gallium-gonzollium 808 78 25ms 26 Aug 2024 435th Europe2048 808 78 19ms 24 Nov 2024 435th GeneralFabian 808 78 27ms 14 Dec 2024 435th skaravind 808 78 20ms 19 Jan 2026 435th samuel-thesing 🇩🇪 808 78 24ms 24 days ago 458th kevdah 797 79 21ms 27 May 2022 458th jacklynnepenick 797 79 20ms 22 Jun 2022 458th james-downey 797 79 28ms 9 Jul 2022 458th andre-lameirinhas 🇵🇹 797 79 23ms 26 Jul 2022 458th hamsterskywalker 797 79 21ms 7 Sep 2022 458th Pena86 797 79 26ms 14 Sep 2022 458th hymanimy 797 79 27ms 24 Nov 2022 458th Demonarchet 797 79 19ms 18 Apr 2023 458th dtaylor0 797 79 20ms 23 May 2023 458th bac0id 797 79 19ms 26 Sep 2023 458th neonchickens 797 79 26ms 6 Oct 2023 458th MWI-polygolf 797 79 20ms 6 Dec 2023 458th eddvrs 797 79 22ms 22 Dec 2023 458th tknight00 797 79 26ms 7 Mar 2024 458th thienudomsrirungruang 797 79 48ms 3 May 2024 458th IsaacAlexBarden 797 79 25ms 6 Feb 2025 458th taesungh 797 79 23ms 7 Jun 2025 458th benvreeves 797 79 21ms 25 Jul 2025 458th saturzay 797 79 27ms 19 Aug 2025 458th TransformLikeATensor 797 79 19ms 16 Oct 2025 458th tomh1012 797 79 23ms 3 Dec 2025 458th JesseNoEyes 🇺🇸 797 79 19ms 15 Jan 2026 458th denkyuu1 797 79 20ms 3 days ago First Prev 401–480 of 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