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 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 Apéry’s Constant Binary Lambda Calculus 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 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Apéry’s Constant Binary Lambda Calculus 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 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 244th Pyroan 770 74 21ms 27 Mar 2025 244th Squimbletin 770 74 20ms 19 Apr 2025 244th Dandandooo 770 74 20ms 23 Apr 2025 244th khangtm123 770 74 20ms 4 May 2025 244th 40fied4t 770 74 19ms 6 May 2025 244th gamk3 770 74 18ms 6 May 2025 244th TheZwierzLF 🇵🇱 770 74 21ms 21 May 2025 244th kbeat 🇰🇿 770 74 19ms 21 May 2025 244th LvLError 770 74 19ms 29 May 2025 244th ffelixm 770 74 20ms 3 Jun 2025 244th osNiko 🇧🇷 770 74 20ms 26 Jul 2025 244th wobblybits 770 74 18ms 13 Aug 2025 244th denisfouchard 770 74 19ms 23 Aug 2025 244th Emutis 🇱🇹 770 74 20ms 23 Aug 2025 244th edsrzf 🇳🇿 770 74 19ms 10 Sep 2025 244th Matter1024 🇮🇳 770 74 21ms 11 Sep 2025 244th pauljoohyunkim 770 74 18ms 25 Sep 2025 244th joll05 🇸🇪 770 74 23ms 1 Oct 2025 244th retrohun 770 74 19ms 3 Oct 2025 244th solisolu 770 74 21ms 4 Oct 2025 244th Code-Coder-coder 770 74 19ms 12 Oct 2025 244th fvla 770 74 25ms 31 Oct 2025 244th zgialor-lab 770 74 18ms 17 Dec 2025 244th 77Tigers 770 74 23ms 8 Jan 2026 244th netfri25 🇮🇱 770 74 20ms 31 Jan 2026 244th rotemkm 770 74 19ms 14 days ago 244th RodAlc24 🇪🇸 770 74 19ms 2 days ago 348th martinnorling 🇸🇪 760 75 24ms 5 May 2022 348th Trunksistor 🇫🇷 760 75 24ms 9 May 2022 348th bbakersmith 760 75 22ms 28 Jun 2022 348th bsoyka 🇺🇸 760 75 19ms 16 Jul 2022 348th julienlamoureux78 760 75 20ms 12 Aug 2022 348th dzshn 760 75 24ms 16 Aug 2022 348th destofr 760 75 18ms 25 Aug 2022 348th vishwathg 760 75 49ms 10 Oct 2022 348th nkoppel 760 75 19ms 19 Oct 2022 348th AZ9tumas 760 75 20ms 23 Oct 2022 348th EthanGrant1 760 75 24ms 7 Nov 2022 348th Omega65536 🇩🇪 760 75 19ms 24 Nov 2022 348th b10011 🇫🇮 760 75 24ms 3 Jan 2023 348th 4ndyJ 🇬🇧 760 75 23ms 3 Jan 2023 348th randolchance 760 75 21ms 8 Jan 2023 348th LeeCamp 760 75 20ms 12 Jan 2023 348th hellwue 760 75 20ms 15 Feb 2023 348th nandanjp 760 75 20ms 29 Mar 2023 348th galloj 🇨🇿 760 75 18ms 20 May 2023 348th jhu04 760 75 19ms 23 Jun 2023 348th HelloYuiYui 760 75 18ms 1 Nov 2023 348th tobyLovick 760 75 26ms 10 Nov 2023 348th RZ781 760 75 27ms 19 Nov 2023 348th mikehanus 760 75 26ms 21 Nov 2023 348th Hebelub 760 75 23ms 6 Jan 2024 348th minhtrancccp 760 75 25ms 11 Jan 2024 348th jbjd 760 75 23ms 25 Feb 2024 348th gabe-gallegos 760 75 19ms 2 May 2024 348th kejcao 🇨🇦 760 75 25ms 11 May 2024 348th Florian-Mt 760 75 19ms 22 Jul 2024 348th codingisgreatbutiamnot 760 75 21ms 9 Aug 2024 348th Terobero 760 75 32ms 23 Aug 2024 348th RedzGoose 🇦🇺 760 75 22ms 7 Oct 2024 348th Clay-Goodling 760 75 24ms 8 Oct 2024 348th jiji7879 760 75 24ms 20 Jun 2025 348th faragocsaba 760 75 24ms 22 Jun 2025 348th bknower 760 75 19ms 30 Jun 2025 348th clayboll99 760 75 23ms 14 Jul 2025 348th Nikinator2704 760 75 18ms 1 Nov 2025 348th mmoffitt 760 75 26ms 19 Nov 2025 348th AdrienHache 🇫🇷 760 75 19ms 20 Dec 2025 348th jesuscbm 760 75 19ms 2 days ago 390th guilhem-roy 🇫🇷 750 76 24ms 5 May 2022 390th NewDefectus 🇮🇱 750 76 22ms 6 May 2022 390th CuboidRaptor 🇨🇦 750 76 23ms 25 May 2022 390th TheSmilingTurtle 750 76 26ms 5 Jun 2022 390th Romain-1 🇫🇷 750 76 19ms 8 Jun 2022 390th jhpaques 🇫🇷 750 76 23ms 30 Jul 2022 390th chriscianfarani 750 76 25ms 10 Aug 2022 390th eshilo-draper 750 76 21ms 13 Sep 2022 390th suwat513 750 76 21ms 22 Sep 2022 390th PogLop 🇨🇿 750 76 20ms 3 Nov 2022 390th Jaydosu 750 76 23ms 14 Nov 2022 First 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