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) Taxicab Numbers 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 Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic 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) Taxicab Numbers 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 Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 499th hjcafaroUC 788 80 26ms 21 Jun 2022 499th dankleeman 788 80 19ms 8 Aug 2022 499th dillon-duncando 788 80 22ms 4 Oct 2022 499th DrPiranoid 788 80 24ms 11 Nov 2022 499th mdnestor 788 80 23ms 23 Dec 2022 499th Edjyzod 788 80 17ms 7 Mar 2023 499th henry-von-wichert 788 80 25ms 31 Mar 2023 499th Hortaros 788 80 21ms 16 Apr 2023 499th ankeetparikh 788 80 20ms 5 May 2023 499th Neonader 788 80 26ms 9 May 2023 499th nickgza 788 80 18ms 17 Aug 2023 499th MiranDaniel 🇨🇿 788 80 27ms 30 Aug 2023 499th Fanrco 788 80 19ms 31 Aug 2023 499th nyoshe 788 80 20ms 10 Oct 2023 499th AzroyAr 788 80 28ms 28 Dec 2023 499th Alex-Huggett 🇬🇧 788 80 58ms 13 Apr 2024 499th RobertHoeh 788 80 27ms 27 May 2024 499th LorenzoDeGaspari 788 80 24ms 27 May 2024 499th AstroOrbis 788 80 28ms 7 May 2025 499th vgamula 🇺🇦 788 80 23ms 16 Jul 2025 499th imoxyg 788 80 29ms 29 Aug 2025 499th Tristanchaang 788 80 22ms 13 Nov 2025 499th someCoder-a11y 788 80 17ms 13 days ago 499th Seltos7224 788 80 27ms 5 mins ago 525th abba23 778 81 28ms 26 May 2022 525th docd 778 81 19ms 8 Aug 2022 525th Smetalo 778 81 29ms 25 Aug 2022 525th glesnick 778 81 25ms 6 Sep 2022 525th Yareeeema 778 81 25ms 3 Nov 2022 525th RandGuy 778 81 27ms 23 Nov 2022 525th GWStuart 778 81 25ms 19 Dec 2022 525th wa1ker38552 778 81 21ms 22 May 2023 525th LimaoC 778 81 23ms 11 Aug 2023 525th robertovers 778 81 24ms 2 Oct 2023 525th HanaEndUser 778 81 20ms 15 Feb 2024 525th Loag 778 81 19ms 22 Sep 2024 525th julian-hoelz 778 81 18ms 23 Sep 2024 525th GoldStar184 778 81 23ms 27 Nov 2024 525th mchalunderscore 778 81 24ms 5 Jan 2025 525th csharpython 778 81 15ms 2 Aug 2025 525th ImanolCiganda 778 81 27ms 26 Feb 2026 542nd Ailko 🇧🇪 768 82 27ms 12 May 2022 542nd joshmoody24 768 82 27ms 12 May 2022 542nd andrewgopher 768 82 20ms 25 Jun 2022 542nd estomagordo 🇳🇱 768 82 25ms 26 Oct 2022 542nd ellis-rix 768 82 25ms 14 Nov 2022 542nd twocatsinatrenchcoat 768 82 19ms 29 Nov 2022 542nd aid-f 768 82 24ms 21 Mar 2023 542nd henrydukepickle 768 82 18ms 8 Dec 2023 542nd amollberg 🇸🇪 768 82 25ms 3 Jan 2024 542nd mrmena 🇦🇺 768 82 29ms 19 Mar 2024 542nd rifatx 768 82 26ms 16 Jul 2024 542nd NicoH76 768 82 19ms 24 Apr 2025 542nd 0dyse 768 82 27ms 29 Apr 2025 542nd gamk3 768 82 19ms 6 May 2025 542nd some-function 768 82 21ms 2 Jul 2025 542nd jacekwladzinski 768 82 25ms 12 Nov 2025 542nd Arkadios200 768 82 31ms 23 days ago 559th bonevbs 759 83 22ms 8 May 2022 559th feherd 759 83 19ms 20 May 2022 559th pbleich 759 83 24ms 24 Aug 2022 559th RoscoeSmith 759 83 26ms 20 Nov 2022 559th amadeusdotpng 759 83 19ms 22 Apr 2023 559th ross-i 759 83 19ms 5 Jul 2023 559th anonymaew 759 83 26ms 2 Aug 2023 559th mstang107 759 83 23ms 20 Dec 2023 559th LHLaurini 🇧🇷 759 83 18ms 26 Jun 2024 559th C0derX3 🇺🇸 759 83 22ms 18 Sep 2024 559th ComputerKWasTaken 🇺🇸 759 83 27ms 20 Jan 2025 559th Vexxter9 🇳🇱 759 83 58ms 4 Feb 2025 559th CodyKlingler 759 83 25ms 7 Feb 2025 559th OyuDays 759 83 21ms 17 Mar 2025 559th julianreece 759 83 23ms 29 Apr 2025 559th rustykitty 🇺🇸 759 83 22ms 24 Oct 2025 559th Kinkade76 759 83 36ms 4 Feb 2026 559th parthm2005 759 83 18ms 28 Feb 2026 559th Apfelvater 759 83 28ms 5 Mar 2026 559th kitotch 759 83 24ms 17 Mar 2026 579th Feniske 🇫🇷 750 84 20ms 7 Oct 2022 579th Eilonlif 🇮🇱 750 84 23ms 29 Mar 2023 579th mhsaul 750 84 17ms 11 Apr 2023 579th Phyisis 750 84 22ms 30 Apr 2024 579th MaxCastella 🇫🇷 750 84 23ms 11 Oct 2024 579th SURAJMITTAL 750 84 17ms 17 Dec 2024 579th simplylu 750 84 20ms 5 Jan 2025 579th WillowWispy 750 84 22ms 14 Mar 2025 579th VedJosh 750 84 25ms 3 May 2025 579th hetz2625 750 84 25ms 4 May 2025 579th ottav14 750 84 21ms 1 Dec 2025 579th benanlam 750 84 21ms 24 Dec 2025 579th pph-2203 750 84 17ms 26 Feb 2026 592nd aazuspan 741 85 19ms 15 Jun 2022 592nd myleopard 741 85 22ms 20 Jul 2022 592nd LukasFolwarczny 🇨🇿 741 85 26ms 16 Sep 2022 592nd SB-945 741 85 25ms 7 Feb 2024 592nd aaardwark 741 85 22ms 1 Jun 2025 592nd kmathis22 741 85 20ms 10 Sep 2025 598th MichaelMBradley 🇨🇦 733 86 24ms 5 Jun 2022 598th Lemonz-13223 733 86 20ms 21 Sep 2022 598th Bodo171 733 86 25ms 24 Nov 2022 First Prev 501–600 of 854 Next Last