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 479th james-downey 722 79 25ms 9 Jul 2022 479th andre-lameirinhas 🇵🇹 722 79 24ms 26 Jul 2022 479th hamsterskywalker 722 79 21ms 7 Sep 2022 479th Pena86 722 79 28ms 14 Sep 2022 479th hymanimy 722 79 26ms 24 Nov 2022 479th Demonarchet 722 79 21ms 18 Apr 2023 479th dtaylor0 722 79 19ms 23 May 2023 479th neonchickens 722 79 30ms 6 Oct 2023 479th MWI-polygolf 722 79 21ms 6 Dec 2023 479th eddvrs 722 79 24ms 22 Dec 2023 479th tknight00 722 79 27ms 7 Mar 2024 479th thienudomsrirungruang 722 79 49ms 3 May 2024 479th IsaacAlexBarden 722 79 33ms 6 Feb 2025 479th taesungh 722 79 24ms 7 Jun 2025 479th benvreeves 722 79 20ms 25 Jul 2025 479th saturzay 722 79 27ms 19 Aug 2025 479th tomh1012 722 79 24ms 3 Dec 2025 479th JesseNoEyes 🇺🇸 722 79 20ms 15 Jan 2026 479th milktea-ish 722 79 22ms 5 Mar 2026 500th j-Ewan 713 80 21ms 13 May 2022 500th osmith93 713 80 35ms 14 Jun 2022 500th hjcafaroUC 713 80 26ms 21 Jun 2022 500th dankleeman 713 80 19ms 8 Aug 2022 500th dillon-duncando 713 80 22ms 4 Oct 2022 500th DrPiranoid 713 80 24ms 11 Nov 2022 500th mdnestor 713 80 23ms 23 Dec 2022 500th Edjyzod 713 80 17ms 7 Mar 2023 500th henry-von-wichert 713 80 25ms 31 Mar 2023 500th Hortaros 713 80 21ms 16 Apr 2023 500th ankeetparikh 713 80 20ms 5 May 2023 500th Neonader 713 80 26ms 9 May 2023 500th nickgza 713 80 18ms 17 Aug 2023 500th MiranDaniel 🇨🇿 713 80 27ms 30 Aug 2023 500th Fanrco 713 80 19ms 31 Aug 2023 500th nyoshe 713 80 20ms 10 Oct 2023 500th AzroyAr 713 80 28ms 28 Dec 2023 500th Alex-Huggett 🇬🇧 713 80 58ms 13 Apr 2024 500th RobertHoeh 713 80 27ms 27 May 2024 500th LorenzoDeGaspari 713 80 24ms 27 May 2024 500th AstroOrbis 713 80 28ms 7 May 2025 500th vgamula 🇺🇦 713 80 23ms 16 Jul 2025 500th imoxyg 713 80 29ms 29 Aug 2025 500th Tristanchaang 713 80 22ms 13 Nov 2025 500th Jakob-L-M 713 80 29ms 30 hours ago 525th abba23 704 81 28ms 26 May 2022 525th docd 704 81 19ms 8 Aug 2022 525th Smetalo 704 81 29ms 25 Aug 2022 525th glesnick 704 81 25ms 6 Sep 2022 525th Yareeeema 704 81 25ms 3 Nov 2022 525th RandGuy 704 81 27ms 23 Nov 2022 525th GWStuart 704 81 25ms 19 Dec 2022 525th wa1ker38552 704 81 21ms 22 May 2023 525th LimaoC 704 81 23ms 11 Aug 2023 525th robertovers 704 81 24ms 2 Oct 2023 525th HanaEndUser 704 81 20ms 15 Feb 2024 525th Loag 704 81 19ms 22 Sep 2024 525th julian-hoelz 704 81 18ms 23 Sep 2024 525th GoldStar184 704 81 23ms 27 Nov 2024 525th mchalunderscore 704 81 24ms 5 Jan 2025 525th csharpython 704 81 15ms 2 Aug 2025 525th ImanolCiganda 704 81 27ms 26 Feb 2026 542nd Ailko 🇧🇪 695 82 27ms 12 May 2022 542nd joshmoody24 695 82 27ms 12 May 2022 542nd andrewgopher 695 82 20ms 25 Jun 2022 542nd estomagordo 🇳🇱 695 82 25ms 26 Oct 2022 542nd ellis-rix 695 82 25ms 14 Nov 2022 542nd twocatsinatrenchcoat 695 82 19ms 29 Nov 2022 542nd aid-f 695 82 24ms 21 Mar 2023 542nd nooby31415 695 82 20ms 3 Nov 2023 542nd henrydukepickle 695 82 18ms 8 Dec 2023 542nd amollberg 🇸🇪 695 82 25ms 3 Jan 2024 542nd mrmena 🇦🇺 695 82 29ms 19 Mar 2024 542nd rifatx 695 82 26ms 16 Jul 2024 542nd NicoH76 695 82 19ms 24 Apr 2025 542nd 0dyse 695 82 27ms 29 Apr 2025 542nd some-function 695 82 21ms 2 Jul 2025 542nd jacekwladzinski 695 82 25ms 12 Nov 2025 542nd Arkadios200 695 82 31ms 40 hours ago 559th bonevbs 687 83 22ms 8 May 2022 559th feherd 687 83 19ms 20 May 2022 First Prev 481–560 of 848 Next Last