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 241st khangtm123 770 74 18ms 4 May 2025 241st 40fied4t 770 74 19ms 6 May 2025 241st gamk3 770 74 18ms 6 May 2025 241st TheZwierzLF 🇵🇱 770 74 20ms 21 May 2025 241st kbeat 🇰🇿 770 74 19ms 21 May 2025 241st LvLError 770 74 19ms 29 May 2025 241st ffelixm 770 74 19ms 3 Jun 2025 241st osNiko 🇧🇷 770 74 20ms 26 Jul 2025 241st wobblybits 770 74 19ms 13 Aug 2025 241st denisfouchard 770 74 18ms 23 Aug 2025 241st Emutis 🇱🇹 770 74 19ms 23 Aug 2025 241st edsrzf 🇳🇿 770 74 18ms 10 Sep 2025 241st Matter1024 🇮🇳 770 74 18ms 11 Sep 2025 241st pauljoohyunkim 770 74 19ms 25 Sep 2025 241st joll05 🇸🇪 770 74 23ms 1 Oct 2025 241st retrohun 770 74 20ms 3 Oct 2025 241st solisolu 770 74 20ms 4 Oct 2025 241st Code-Coder-coder 770 74 19ms 12 Oct 2025 241st fvla 770 74 24ms 31 Oct 2025 241st zgialor-lab 770 74 23ms 15 days ago 341st martinnorling 🇸🇪 760 75 22ms 5 May 2022 341st Trunksistor 🇫🇷 760 75 23ms 9 May 2022 341st bbakersmith 760 75 23ms 28 Jun 2022 341st bsoyka 🇺🇸 760 75 18ms 16 Jul 2022 341st julienlamoureux78 760 75 18ms 12 Aug 2022 341st dzshn 760 75 24ms 16 Aug 2022 341st destofr 760 75 19ms 25 Aug 2022 341st vishwathg 760 75 50ms 10 Oct 2022 341st nkoppel 760 75 19ms 19 Oct 2022 341st AZ9tumas 760 75 19ms 23 Oct 2022 341st EthanGrant1 760 75 22ms 7 Nov 2022 341st Omega65536 🇩🇪 760 75 18ms 24 Nov 2022 341st b10011 🇫🇮 760 75 24ms 3 Jan 2023 341st 4ndyJ 🇬🇧 760 75 21ms 3 Jan 2023 341st randolchance 760 75 18ms 8 Jan 2023 341st LeeCamp 760 75 17ms 12 Jan 2023 341st hellwue 760 75 19ms 15 Feb 2023 341st nandanjp 760 75 19ms 29 Mar 2023 341st galloj 🇨🇿 760 75 18ms 20 May 2023 341st jhu04 760 75 21ms 23 Jun 2023 341st HelloYuiYui 760 75 19ms 1 Nov 2023 341st tobyLovick 760 75 25ms 10 Nov 2023 341st RZ781 760 75 29ms 19 Nov 2023 341st mikehanus 760 75 23ms 21 Nov 2023 341st Hebelub 760 75 27ms 6 Jan 2024 341st minhtrancccp 760 75 22ms 11 Jan 2024 341st jbjd 760 75 22ms 25 Feb 2024 341st gabe-gallegos 760 75 19ms 2 May 2024 341st kejcao 🇨🇦 760 75 23ms 11 May 2024 341st Florian-Mt 760 75 24ms 22 Jul 2024 341st codingisgreatbutiamnot 760 75 19ms 9 Aug 2024 341st Terobero 760 75 30ms 23 Aug 2024 341st RedzGoose 🇦🇺 760 75 23ms 7 Oct 2024 341st Clay-Goodling 760 75 24ms 8 Oct 2024 341st jiji7879 760 75 23ms 20 Jun 2025 341st faragocsaba 760 75 24ms 22 Jun 2025 341st bknower 760 75 19ms 30 Jun 2025 341st clayboll99 760 75 21ms 14 Jul 2025 341st Nikinator2704 760 75 19ms 1 Nov 2025 341st mmoffitt 760 75 24ms 19 Nov 2025 341st AdrienHache 🇫🇷 760 75 18ms 12 days ago 382nd guilhem-roy 🇫🇷 750 76 24ms 5 May 2022 382nd NewDefectus 🇮🇱 750 76 21ms 6 May 2022 382nd CuboidRaptor 🇨🇦 750 76 23ms 25 May 2022 382nd TheSmilingTurtle 750 76 26ms 5 Jun 2022 382nd Romain-1 🇫🇷 750 76 18ms 8 Jun 2022 382nd jhpaques 🇫🇷 750 76 25ms 30 Jul 2022 382nd chriscianfarani 750 76 24ms 10 Aug 2022 382nd eshilo-draper 750 76 22ms 13 Sep 2022 382nd suwat513 750 76 19ms 22 Sep 2022 382nd PogLop 🇨🇿 750 76 21ms 3 Nov 2022 382nd Jaydosu 750 76 22ms 14 Nov 2022 382nd tails618 750 76 26ms 2 Dec 2022 382nd KevinLyvers 750 76 19ms 17 Dec 2022 382nd nayakrujul 750 76 19ms 3 Jan 2023 382nd CatsAreFluffy 750 76 24ms 18 Feb 2023 382nd Schreipfelerer 750 76 26ms 9 Apr 2023 382nd hm5822 750 76 25ms 22 Apr 2023 382nd celiendonze 🇨🇭 750 76 25ms 5 Jul 2023 382nd brochmann 🇸🇪 750 76 21ms 13 Aug 2023 First Prev 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