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 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 Calendar 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 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 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 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 Calendar 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 240th 40fied4t 770 74 19ms 6 May 2025 240th gamk3 770 74 18ms 6 May 2025 240th TheZwierzLF 🇵🇱 770 74 20ms 21 May 2025 240th kbeat 🇰🇿 770 74 19ms 21 May 2025 240th LvLError 770 74 19ms 29 May 2025 240th ffelixm 770 74 19ms 3 Jun 2025 240th osNiko 🇧🇷 770 74 20ms 26 Jul 2025 240th wobblybits 770 74 19ms 13 Aug 2025 240th denisfouchard 770 74 18ms 23 Aug 2025 240th Emutis 🇱🇹 770 74 19ms 23 Aug 2025 240th edsrzf 🇳🇿 770 74 18ms 10 Sep 2025 240th Matter1024 🇮🇳 770 74 18ms 11 Sep 2025 240th pauljoohyunkim 770 74 19ms 25 Sep 2025 240th joll05 🇸🇪 770 74 23ms 1 Oct 2025 240th retrohun 770 74 20ms 3 Oct 2025 240th solisolu 770 74 20ms 4 Oct 2025 240th Code-Coder-coder 770 74 19ms 12 Oct 2025 240th fvla 770 74 24ms 31 Oct 2025 240th zgialor-lab 770 74 23ms 36 hours ago 340th martinnorling 🇸🇪 760 75 22ms 5 May 2022 340th Trunksistor 🇫🇷 760 75 23ms 9 May 2022 340th bbakersmith 760 75 23ms 28 Jun 2022 340th bsoyka 🇺🇸 760 75 18ms 16 Jul 2022 340th julienlamoureux78 760 75 18ms 12 Aug 2022 340th dzshn 760 75 24ms 16 Aug 2022 340th destofr 760 75 19ms 25 Aug 2022 340th vishwathg 760 75 50ms 10 Oct 2022 340th nkoppel 760 75 19ms 19 Oct 2022 340th AZ9tumas 760 75 19ms 23 Oct 2022 340th EthanGrant1 760 75 22ms 7 Nov 2022 340th Omega65536 🇩🇪 760 75 18ms 24 Nov 2022 340th b10011 🇫🇮 760 75 24ms 3 Jan 2023 340th 4ndyJ 🇬🇧 760 75 21ms 3 Jan 2023 340th randolchance 760 75 18ms 8 Jan 2023 340th LeeCamp 760 75 17ms 12 Jan 2023 340th hellwue 760 75 19ms 15 Feb 2023 340th nandanjp 760 75 19ms 29 Mar 2023 340th galloj 🇨🇿 760 75 18ms 20 May 2023 340th jhu04 760 75 21ms 23 Jun 2023 340th HelloYuiYui 760 75 19ms 1 Nov 2023 340th tobyLovick 760 75 25ms 10 Nov 2023 340th RZ781 760 75 29ms 19 Nov 2023 340th mikehanus 760 75 23ms 21 Nov 2023 340th Hebelub 760 75 27ms 6 Jan 2024 340th minhtrancccp 760 75 22ms 11 Jan 2024 340th jbjd 760 75 22ms 25 Feb 2024 340th gabe-gallegos 760 75 19ms 2 May 2024 340th kejcao 🇨🇦 760 75 23ms 11 May 2024 340th Florian-Mt 760 75 24ms 22 Jul 2024 340th codingisgreatbutiamnot 760 75 19ms 9 Aug 2024 340th Terobero 760 75 30ms 23 Aug 2024 340th RedzGoose 🇦🇺 760 75 23ms 7 Oct 2024 340th Clay-Goodling 760 75 24ms 8 Oct 2024 340th jiji7879 760 75 23ms 20 Jun 2025 340th faragocsaba 760 75 24ms 22 Jun 2025 340th bknower 760 75 19ms 30 Jun 2025 340th clayboll99 760 75 21ms 14 Jul 2025 340th Nikinator2704 760 75 19ms 1 Nov 2025 340th mmoffitt 760 75 24ms 19 Nov 2025 380th guilhem-roy 🇫🇷 750 76 24ms 5 May 2022 380th NewDefectus 🇮🇱 750 76 21ms 6 May 2022 380th CuboidRaptor 🇨🇦 750 76 23ms 25 May 2022 380th TheSmilingTurtle 750 76 26ms 5 Jun 2022 380th Romain-1 🇫🇷 750 76 18ms 8 Jun 2022 380th jhpaques 🇫🇷 750 76 25ms 30 Jul 2022 380th chriscianfarani 750 76 24ms 10 Aug 2022 380th eshilo-draper 750 76 22ms 13 Sep 2022 380th suwat513 750 76 19ms 22 Sep 2022 380th PogLop 🇨🇿 750 76 21ms 3 Nov 2022 380th Jaydosu 750 76 22ms 14 Nov 2022 380th tails618 750 76 26ms 2 Dec 2022 380th KevinLyvers 750 76 19ms 17 Dec 2022 380th nayakrujul 750 76 19ms 3 Jan 2023 380th CatsAreFluffy 750 76 24ms 18 Feb 2023 380th Schreipfelerer 750 76 26ms 9 Apr 2023 380th hm5822 750 76 25ms 22 Apr 2023 380th celiendonze 🇨🇭 750 76 25ms 5 Jul 2023 380th brochmann 🇸🇪 750 76 21ms 13 Aug 2023 380th Command-Master 750 76 35ms 2 Oct 2023 380th chartung17 750 76 20ms 17 Dec 2023 First Prev 321–400 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