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 399th CuboidRaptor 🇨🇦 750 76 23ms 25 May 2022 399th TheSmilingTurtle 750 76 26ms 5 Jun 2022 399th Romain-1 🇫🇷 750 76 20ms 8 Jun 2022 399th jhpaques 🇫🇷 750 76 24ms 30 Jul 2022 399th chriscianfarani 750 76 23ms 10 Aug 2022 399th eshilo-draper 750 76 22ms 13 Sep 2022 399th suwat513 750 76 22ms 22 Sep 2022 399th PogLop 🇨🇿 750 76 23ms 3 Nov 2022 399th Jaydosu 750 76 23ms 14 Nov 2022 399th tails618 750 76 28ms 2 Dec 2022 399th KevinLyvers 750 76 22ms 17 Dec 2022 399th nayakrujul 750 76 20ms 3 Jan 2023 399th CatsAreFluffy 750 76 29ms 18 Feb 2023 399th Schreipfelerer 750 76 30ms 9 Apr 2023 399th hm5822 750 76 27ms 22 Apr 2023 399th celiendonze 🇨🇭 750 76 26ms 5 Jul 2023 399th brochmann 🇸🇪 750 76 22ms 13 Aug 2023 399th Command-Master 750 76 35ms 2 Oct 2023 399th chartung17 750 76 20ms 17 Dec 2023 399th smokestacklightnin 🇺🇸 750 76 29ms 10 Jan 2024 399th NickTheEASDude 🇺🇸 750 76 60ms 26 Jan 2024 399th yuchuehw 750 76 29ms 2 Feb 2024 399th Azearia 750 76 27ms 26 Feb 2024 399th khavik 750 76 27ms 29 May 2024 399th Ythaenagor 750 76 23ms 5 Aug 2024 399th martion2007 750 76 56ms 9 Aug 2024 399th sjrct 750 76 28ms 10 Aug 2024 399th Mathrew2012 750 76 16ms 9 Nov 2024 399th kawrei 750 76 28ms 4 May 2025 399th mathieurodic 750 76 26ms 21 Oct 2025 399th yoikolover 750 76 26ms 11 Dec 2025 399th matricronia 750 76 28ms 28 Jan 2026 399th muser-logiccpu 🇺🇦 750 76 25ms 24 Feb 2026 399th Ignacio6D2 750 76 20ms 26 Feb 2026 399th mkikta 750 76 27ms 9 days ago 436th cooljoseph1 740 77 24ms 6 May 2022 436th krcs 🇵🇱 740 77 22ms 11 May 2022 436th kenballus 740 77 26ms 13 Jul 2022 436th 104210 740 77 26ms 29 Jul 2022 436th andre-de-lorde 740 77 20ms 1 Sep 2022 436th zstephe 740 77 28ms 2 Dec 2022 436th badboj40 740 77 25ms 27 Dec 2022 436th henrytranter 740 77 25ms 11 Jan 2023 436th DragonaireM 740 77 24ms 6 Feb 2023 436th Ty-Cyr 740 77 19ms 14 Jul 2023 436th camieac 🇬🇧 740 77 23ms 14 Jul 2023 436th MisterrLuck 740 77 24ms 7 Sep 2023 436th alexjurkiewicz 🇦🇺 740 77 20ms 7 Nov 2023 436th askipio 740 77 23ms 22 Nov 2023 436th enbyte 740 77 20ms 9 Dec 2023 436th trinityy-7 740 77 23ms 17 Dec 2023 436th PyryL 🇫🇮 740 77 20ms 23 Aug 2024 436th CyberTapir 740 77 25ms 27 Aug 2024 436th junten1 740 77 27ms 20 Oct 2024 436th croc54 740 77 28ms 24 Dec 2024 436th za3k 740 77 26ms 3 Jun 2025 436th j-zhang43 740 77 23ms 17 Nov 2025 436th Andrey2001 740 77 24ms 17 days ago 459th AGoyet 731 78 25ms 29 Jul 2022 459th RYNO8 731 78 23ms 16 Aug 2022 459th TheCod-r 🇦🇶 731 78 27ms 28 Sep 2022 459th Marthe-CC 731 78 23ms 9 Oct 2022 459th Wildst 731 78 24ms 2 Nov 2022 459th nmgetahun 731 78 24ms 4 Dec 2022 459th Techdude01 731 78 25ms 13 Dec 2022 459th tvcv901 731 78 21ms 22 Mar 2023 459th oceko 731 78 20ms 24 Mar 2023 459th yoyoyonono 731 78 27ms 15 May 2023 459th Nic0M 731 78 20ms 13 Aug 2023 459th ssbhatt4321 731 78 26ms 14 Oct 2023 459th wyarde 731 78 21ms 7 Nov 2023 459th ItsEthanDev 731 78 21ms 24 Dec 2023 459th adamreidsmith 731 78 30ms 16 Feb 2024 459th DGipe 731 78 23ms 13 May 2024 459th cyxv 731 78 27ms 2 Aug 2024 459th Europe2048 731 78 20ms 24 Nov 2024 459th GeneralFabian 731 78 27ms 14 Dec 2024 459th skaravind 731 78 23ms 19 Jan 2026 459th samuel-thesing 🇩🇪 731 78 29ms 28 Jan 2026 459th 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