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 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 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 ArkScript 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 ArkScript 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 Calendar 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 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 Chars Time Submitted 242nd Dandandooo 770 74 21ms 23 Apr 2025 242nd khangtm123 770 74 18ms 4 May 2025 242nd 40fied4t 770 74 19ms 6 May 2025 242nd gamk3 770 74 18ms 6 May 2025 242nd TheZwierzLF 🇵🇱 770 74 20ms 21 May 2025 242nd kbeat 🇰🇿 770 74 19ms 21 May 2025 242nd LvLError 770 74 19ms 29 May 2025 242nd ffelixm 770 74 19ms 3 Jun 2025 242nd osNiko 🇧🇷 770 74 20ms 26 Jul 2025 242nd wobblybits 770 74 19ms 13 Aug 2025 242nd denisfouchard 770 74 18ms 23 Aug 2025 242nd Emutis 🇱🇹 770 74 19ms 23 Aug 2025 242nd edsrzf 🇳🇿 770 74 18ms 10 Sep 2025 242nd Matter1024 🇮🇳 770 74 18ms 11 Sep 2025 242nd pauljoohyunkim 770 74 19ms 25 Sep 2025 242nd joll05 🇸🇪 770 74 23ms 1 Oct 2025 242nd retrohun 770 74 20ms 3 Oct 2025 242nd solisolu 770 74 20ms 4 Oct 2025 242nd Code-Coder-coder 770 74 19ms 12 Oct 2025 242nd fvla 770 74 24ms 31 Oct 2025 242nd zgialor-lab 770 74 23ms 23 days ago 242nd 77Tigers 770 74 20ms 104 mins ago 343rd martinnorling 🇸🇪 760 75 22ms 5 May 2022 343rd Trunksistor 🇫🇷 760 75 23ms 9 May 2022 343rd bbakersmith 760 75 23ms 28 Jun 2022 343rd bsoyka 🇺🇸 760 75 18ms 16 Jul 2022 343rd julienlamoureux78 760 75 18ms 12 Aug 2022 343rd dzshn 760 75 24ms 16 Aug 2022 343rd destofr 760 75 19ms 25 Aug 2022 343rd vishwathg 760 75 50ms 10 Oct 2022 343rd nkoppel 760 75 19ms 19 Oct 2022 343rd AZ9tumas 760 75 19ms 23 Oct 2022 343rd EthanGrant1 760 75 22ms 7 Nov 2022 343rd Omega65536 🇩🇪 760 75 18ms 24 Nov 2022 343rd b10011 🇫🇮 760 75 24ms 3 Jan 2023 343rd 4ndyJ 🇬🇧 760 75 21ms 3 Jan 2023 343rd randolchance 760 75 18ms 8 Jan 2023 343rd LeeCamp 760 75 17ms 12 Jan 2023 343rd hellwue 760 75 19ms 15 Feb 2023 343rd nandanjp 760 75 19ms 29 Mar 2023 343rd galloj 🇨🇿 760 75 18ms 20 May 2023 343rd jhu04 760 75 21ms 23 Jun 2023 343rd HelloYuiYui 760 75 19ms 1 Nov 2023 343rd tobyLovick 760 75 25ms 10 Nov 2023 343rd RZ781 760 75 29ms 19 Nov 2023 343rd mikehanus 760 75 23ms 21 Nov 2023 343rd Hebelub 760 75 27ms 6 Jan 2024 343rd minhtrancccp 760 75 22ms 11 Jan 2024 343rd jbjd 760 75 22ms 25 Feb 2024 343rd gabe-gallegos 760 75 19ms 2 May 2024 343rd kejcao 🇨🇦 760 75 23ms 11 May 2024 343rd Florian-Mt 760 75 24ms 22 Jul 2024 343rd codingisgreatbutiamnot 760 75 19ms 9 Aug 2024 343rd Terobero 760 75 30ms 23 Aug 2024 343rd RedzGoose 🇦🇺 760 75 23ms 7 Oct 2024 343rd Clay-Goodling 760 75 24ms 8 Oct 2024 343rd jiji7879 760 75 23ms 20 Jun 2025 343rd faragocsaba 760 75 24ms 22 Jun 2025 343rd bknower 760 75 19ms 30 Jun 2025 343rd clayboll99 760 75 21ms 14 Jul 2025 343rd Nikinator2704 760 75 19ms 1 Nov 2025 343rd mmoffitt 760 75 24ms 19 Nov 2025 343rd AdrienHache 🇫🇷 760 75 18ms 19 days ago 384th guilhem-roy 🇫🇷 750 76 24ms 5 May 2022 384th NewDefectus 🇮🇱 750 76 21ms 6 May 2022 384th CuboidRaptor 🇨🇦 750 76 23ms 25 May 2022 384th TheSmilingTurtle 750 76 26ms 5 Jun 2022 384th Romain-1 🇫🇷 750 76 18ms 8 Jun 2022 384th jhpaques 🇫🇷 750 76 25ms 30 Jul 2022 384th chriscianfarani 750 76 24ms 10 Aug 2022 384th eshilo-draper 750 76 22ms 13 Sep 2022 384th suwat513 750 76 19ms 22 Sep 2022 384th PogLop 🇨🇿 750 76 21ms 3 Nov 2022 384th Jaydosu 750 76 22ms 14 Nov 2022 384th tails618 750 76 26ms 2 Dec 2022 384th KevinLyvers 750 76 19ms 17 Dec 2022 384th nayakrujul 750 76 19ms 3 Jan 2023 384th CatsAreFluffy 750 76 24ms 18 Feb 2023 384th Schreipfelerer 750 76 26ms 9 Apr 2023 384th hm5822 750 76 25ms 22 Apr 2023 First Prev 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