Collatz in Python in chars. 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 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 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 Chars Time Submitted 459th Deppyforce 731 78 20ms 13 Mar 2026 459th denkyuu1 731 78 22ms 23 days ago 483rd kevdah 722 79 22ms 27 May 2022 483rd jacklynnepenick 722 79 19ms 22 Jun 2022 483rd james-downey 722 79 25ms 9 Jul 2022 483rd andre-lameirinhas 🇵🇹 722 79 24ms 26 Jul 2022 483rd hamsterskywalker 722 79 21ms 7 Sep 2022 483rd Pena86 722 79 28ms 14 Sep 2022 483rd hymanimy 722 79 26ms 24 Nov 2022 483rd Demonarchet 722 79 21ms 18 Apr 2023 483rd dtaylor0 722 79 19ms 23 May 2023 483rd neonchickens 722 79 30ms 6 Oct 2023 483rd MWI-polygolf 722 79 21ms 6 Dec 2023 483rd eddvrs 722 79 24ms 22 Dec 2023 483rd tknight00 722 79 27ms 7 Mar 2024 483rd thienudomsrirungruang 722 79 49ms 3 May 2024 483rd IsaacAlexBarden 722 79 33ms 6 Feb 2025 483rd taesungh 722 79 24ms 7 Jun 2025 483rd benvreeves 722 79 20ms 25 Jul 2025 483rd saturzay 722 79 27ms 19 Aug 2025 483rd tomh1012 722 79 24ms 3 Dec 2025 483rd JesseNoEyes 🇺🇸 722 79 20ms 15 Jan 2026 483rd milktea-ish 722 79 22ms 5 Mar 2026 504th j-Ewan 713 80 21ms 13 May 2022 504th osmith93 713 80 35ms 14 Jun 2022 504th hjcafaroUC 713 80 26ms 21 Jun 2022 504th dankleeman 713 80 19ms 8 Aug 2022 504th dillon-duncando 713 80 22ms 4 Oct 2022 504th DrPiranoid 713 80 24ms 11 Nov 2022 504th mdnestor 713 80 23ms 23 Dec 2022 504th Edjyzod 713 80 17ms 7 Mar 2023 504th henry-von-wichert 713 80 25ms 31 Mar 2023 504th Hortaros 713 80 21ms 16 Apr 2023 504th ankeetparikh 713 80 20ms 5 May 2023 504th Neonader 713 80 26ms 9 May 2023 504th nickgza 713 80 18ms 17 Aug 2023 504th MiranDaniel 🇨🇿 713 80 27ms 30 Aug 2023 504th Fanrco 713 80 19ms 31 Aug 2023 504th nyoshe 713 80 20ms 10 Oct 2023 504th AzroyAr 713 80 28ms 28 Dec 2023 504th Alex-Huggett 🇬🇧 713 80 58ms 13 Apr 2024 504th RobertHoeh 713 80 27ms 27 May 2024 504th LorenzoDeGaspari 713 80 24ms 27 May 2024 504th AstroOrbis 713 80 28ms 7 May 2025 504th vgamula 🇺🇦 713 80 23ms 16 Jul 2025 504th imoxyg 713 80 29ms 29 Aug 2025 504th Tristanchaang 713 80 22ms 13 Nov 2025 504th someCoder-a11y 713 80 17ms 36 hours ago 529th abba23 704 81 28ms 26 May 2022 529th docd 704 81 19ms 8 Aug 2022 529th Smetalo 704 81 29ms 25 Aug 2022 529th glesnick 704 81 25ms 6 Sep 2022 529th Yareeeema 704 81 25ms 3 Nov 2022 529th RandGuy 704 81 27ms 23 Nov 2022 529th GWStuart 704 81 25ms 19 Dec 2022 529th wa1ker38552 704 81 21ms 22 May 2023 529th LimaoC 704 81 23ms 11 Aug 2023 529th robertovers 704 81 24ms 2 Oct 2023 529th HanaEndUser 704 81 20ms 15 Feb 2024 529th Loag 704 81 19ms 22 Sep 2024 529th julian-hoelz 704 81 18ms 23 Sep 2024 529th GoldStar184 704 81 23ms 27 Nov 2024 529th mchalunderscore 704 81 24ms 5 Jan 2025 529th csharpython 704 81 15ms 2 Aug 2025 529th ImanolCiganda 704 81 27ms 26 Feb 2026 546th Ailko 🇧🇪 695 82 27ms 12 May 2022 546th joshmoody24 695 82 27ms 12 May 2022 546th andrewgopher 695 82 20ms 25 Jun 2022 546th estomagordo 🇳🇱 695 82 25ms 26 Oct 2022 546th ellis-rix 695 82 25ms 14 Nov 2022 546th twocatsinatrenchcoat 695 82 19ms 29 Nov 2022 546th aid-f 695 82 24ms 21 Mar 2023 546th nooby31415 695 82 20ms 3 Nov 2023 546th henrydukepickle 695 82 18ms 8 Dec 2023 546th amollberg 🇸🇪 695 82 25ms 3 Jan 2024 546th mrmena 🇦🇺 695 82 29ms 19 Mar 2024 546th rifatx 695 82 26ms 16 Jul 2024 546th NicoH76 695 82 19ms 24 Apr 2025 546th 0dyse 695 82 27ms 29 Apr 2025 546th some-function 695 82 21ms 2 Jul 2025 First Prev 481–560 of 852 Next Last