Collatz in Python in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 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 Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 439th eddvrs 835 79 22ms 22 Dec 2023 439th tknight00 835 79 24ms 7 Mar 2024 439th thienudomsrirungruang 835 79 52ms 3 May 2024 439th IsaacAlexBarden 835 79 23ms 6 Feb 2025 439th taesungh 835 79 24ms 7 Jun 2025 439th benvreeves 835 79 22ms 25 Jul 2025 439th saturzay 835 79 25ms 19 Aug 2025 439th TransformLikeATensor 835 79 19ms 16 Oct 2025 459th j-Ewan 825 80 20ms 13 May 2022 459th osmith93 825 80 33ms 14 Jun 2022 459th hjcafaroUC 825 80 25ms 21 Jun 2022 459th dankleeman 825 80 18ms 8 Aug 2022 459th dillon-duncando 825 80 22ms 4 Oct 2022 459th DrPiranoid 825 80 22ms 11 Nov 2022 459th mdnestor 825 80 24ms 23 Dec 2022 459th Edjyzod 825 80 16ms 7 Mar 2023 459th henry-von-wichert 825 80 28ms 31 Mar 2023 459th Hortaros 825 80 22ms 16 Apr 2023 459th ankeetparikh 825 80 18ms 5 May 2023 459th Neonader 825 80 27ms 9 May 2023 459th nickgza 825 80 16ms 17 Aug 2023 459th MiranDaniel 🇨🇿 825 80 25ms 30 Aug 2023 459th Fanrco 825 80 18ms 31 Aug 2023 459th nyoshe 825 80 21ms 10 Oct 2023 459th AzroyAr 825 80 27ms 28 Dec 2023 459th Alex-Huggett 🇬🇧 825 80 54ms 13 Apr 2024 459th RobertHoeh 825 80 26ms 27 May 2024 459th LorenzoDeGaspari 825 80 23ms 27 May 2024 459th AstroOrbis 825 80 25ms 7 May 2025 459th vgamula 🇺🇦 825 80 22ms 16 Jul 2025 459th imoxyg 825 80 23ms 29 Aug 2025 459th Tristanchaang 825 80 21ms 46 hours ago 483rd abba23 815 81 29ms 26 May 2022 483rd docd 815 81 20ms 8 Aug 2022 483rd Smetalo 815 81 25ms 25 Aug 2022 483rd glesnick 815 81 24ms 6 Sep 2022 483rd Yareeeema 815 81 25ms 3 Nov 2022 483rd RandGuy 815 81 25ms 23 Nov 2022 483rd GWStuart 815 81 25ms 19 Dec 2022 483rd wa1ker38552 815 81 20ms 22 May 2023 483rd LimaoC 815 81 22ms 11 Aug 2023 483rd robertovers 815 81 23ms 2 Oct 2023 483rd HanaEndUser 815 81 17ms 15 Feb 2024 483rd Loag 815 81 16ms 22 Sep 2024 483rd julian-hoelz 815 81 16ms 23 Sep 2024 483rd JesseNoEyes 🇺🇸 815 81 18ms 4 Oct 2024 483rd GoldStar184 815 81 23ms 27 Nov 2024 483rd ihatethefrench 815 81 23ms 5 Jan 2025 483rd csharpython 815 81 16ms 2 Aug 2025 500th Ailko 🇧🇪 805 82 25ms 12 May 2022 500th joshmoody24 805 82 25ms 12 May 2022 500th andrewgopher 805 82 18ms 25 Jun 2022 500th estomagordo 🇳🇱 805 82 25ms 26 Oct 2022 500th ThatAlo 805 82 23ms 14 Nov 2022 500th twocatsinatrenchcoat 805 82 17ms 29 Nov 2022 500th aid-f 805 82 21ms 21 Mar 2023 500th henrydukepickle 805 82 18ms 8 Dec 2023 500th amollberg 🇸🇪 805 82 25ms 3 Jan 2024 500th mrmena 🇦🇺 805 82 26ms 19 Mar 2024 500th rifatx 805 82 22ms 16 Jul 2024 500th NicoH76 805 82 18ms 24 Apr 2025 500th 0dyse 805 82 24ms 29 Apr 2025 500th georgekattenbelt 805 82 18ms 6 May 2025 500th some-function 805 82 16ms 2 Jul 2025 500th jacekwladzinski 805 82 24ms 3 days ago 516th bonevbs 795 83 18ms 8 May 2022 516th feherd 795 83 18ms 20 May 2022 516th pbleich 795 83 23ms 24 Aug 2022 516th RoscoeSmith 795 83 29ms 20 Nov 2022 516th amadeusdotpng 795 83 20ms 22 Apr 2023 516th ross-i 795 83 17ms 5 Jul 2023 516th anonymaew 795 83 26ms 2 Aug 2023 516th mstang107 795 83 22ms 20 Dec 2023 516th LHLaurini 🇧🇷 795 83 17ms 26 Jun 2024 516th C0derX3 🇺🇸 795 83 19ms 18 Sep 2024 First Prev 451–525 of 798 Next Last