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 361st adamnielson42 🇺🇸 829 76 20ms 1 Mar 2023 361st Schreipfelerer 829 76 26ms 9 Apr 2023 361st hm5822 829 76 25ms 22 Apr 2023 361st celiendonze 🇨🇭 829 76 25ms 5 Jul 2023 361st brochmann 🇸🇪 829 76 21ms 13 Aug 2023 361st Command-Master 829 76 35ms 2 Oct 2023 361st chartung17 829 76 20ms 17 Dec 2023 361st smokestacklightnin 🇺🇸 829 76 26ms 10 Jan 2024 361st NickTheEASDude 🇺🇸 829 76 51ms 26 Jan 2024 361st yuchuehw 829 76 25ms 2 Feb 2024 361st Azearia 829 76 26ms 26 Feb 2024 361st tpasfieldERAU 829 76 23ms 18 May 2024 361st khavik 829 76 28ms 29 May 2024 361st Ythaenagor 829 76 23ms 5 Aug 2024 361st martion2007 829 76 49ms 9 Aug 2024 361st sjrct 829 76 25ms 10 Aug 2024 361st Mathrew2012 829 76 16ms 9 Nov 2024 361st kawrei 829 76 29ms 4 May 2025 361st RaBa21 🇭🇺 829 76 24ms 19 Jul 2025 361st mathieurodic 829 76 27ms 21 Oct 2025 361st DrakeSeteraO 829 76 52ms 24 Oct 2025 361st yoikolover 829 76 24ms 3 hours ago 398th cooljoseph1 818 77 23ms 6 May 2022 398th krcs 🇵🇱 818 77 21ms 11 May 2022 398th kenballus 818 77 22ms 13 Jul 2022 398th 104210 818 77 22ms 29 Jul 2022 398th andre-de-lorde 818 77 21ms 1 Sep 2022 398th zstephe 818 77 24ms 2 Dec 2022 398th badboj40 818 77 23ms 27 Dec 2022 398th henrytranter 818 77 27ms 11 Jan 2023 398th DragonaireM 818 77 23ms 6 Feb 2023 398th steffan-polygolf 818 77 19ms 19 Feb 2023 398th kellantech 818 77 19ms 21 May 2023 398th Ty-Cyr 818 77 18ms 14 Jul 2023 398th camieac 🇬🇧 818 77 21ms 14 Jul 2023 398th nathsou 🇫🇷 818 77 21ms 2 Sep 2023 398th MisterrLuck 818 77 22ms 7 Sep 2023 398th alexjurkiewicz 🇦🇺 818 77 19ms 7 Nov 2023 398th askipio 818 77 23ms 22 Nov 2023 398th trinityy-7 818 77 23ms 17 Dec 2023 398th zwxzwxzwx21 818 77 23ms 30 Jan 2024 398th PyryL 🇫🇮 818 77 20ms 23 Aug 2024 398th CyberTapir 818 77 23ms 27 Aug 2024 398th junten1 818 77 26ms 20 Oct 2024 398th croc54 818 77 23ms 24 Dec 2024 398th za3k 818 77 23ms 3 Jun 2025 398th robin-scragg 818 77 18ms 17 Aug 2025 398th j-zhang43 818 77 19ms 24 days ago 424th AGoyet 808 78 22ms 29 Jul 2022 424th RYNO8 808 78 21ms 16 Aug 2022 424th TheCod-r 🇦🇶 808 78 25ms 28 Sep 2022 424th Marthe-CC 808 78 23ms 9 Oct 2022 424th Wildst 808 78 20ms 2 Nov 2022 424th nmgetahun 808 78 22ms 4 Dec 2022 424th Techdude01 808 78 26ms 13 Dec 2022 424th tvcv901 808 78 23ms 22 Mar 2023 424th oceko 808 78 19ms 24 Mar 2023 424th yoyoyonono 808 78 25ms 15 May 2023 424th Nic0M 808 78 18ms 13 Aug 2023 424th ssbhatt4321 808 78 23ms 14 Oct 2023 424th wyarde 808 78 19ms 7 Nov 2023 424th ItsEthanXYZ 808 78 19ms 24 Dec 2023 424th adamreidsmith 808 78 25ms 16 Feb 2024 424th Jacob385 808 78 59ms 5 Mar 2024 424th DGipe 808 78 22ms 13 May 2024 424th cyxv 808 78 24ms 2 Aug 2024 424th gallium-gonzollium 808 78 25ms 26 Aug 2024 424th Europe2048 808 78 19ms 24 Nov 2024 424th GeneralFabian 808 78 25ms 14 Dec 2024 445th kevdah 797 79 24ms 27 May 2022 445th jacklynnepenick 797 79 17ms 22 Jun 2022 445th james-downey 797 79 25ms 9 Jul 2022 445th andre-lameirinhas 🇵🇹 797 79 22ms 26 Jul 2022 445th hamsterskywalker 797 79 19ms 7 Sep 2022 445th Pena86 797 79 25ms 14 Sep 2022 First Prev 376–450 of 809 Next Last