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 641st lovernj 640 89 24ms 23 Aug 2022 641st Roj 640 89 23ms 20 Nov 2022 641st aeonsablaze 640 89 18ms 22 Nov 2022 641st buddyw 640 89 16ms 9 Mar 2023 641st VV1Git 640 89 19ms 28 Mar 2023 641st dranjohn 640 89 21ms 17 Sep 2023 641st ArenaGrenade 640 89 25ms 19 Feb 2024 641st NanduBC 640 89 23ms 6 Sep 2024 641st TheAtrossian 640 89 23ms 5 Jan 2025 641st KimJua41 640 89 20ms 4 May 2025 641st Nathan-Masala 640 89 30ms 10 days ago 652nd StoverGitHub 633 90 22ms 16 Jun 2022 652nd jamespeilunli 633 90 24ms 4 Jul 2022 652nd TrentGlimp 633 90 20ms 3 Sep 2022 652nd Ugoran 633 90 20ms 19 Nov 2022 652nd PATTRIM 633 90 19ms 5 Jan 2023 652nd charliegaming 633 90 19ms 3 Oct 2023 652nd lhulinsky 633 90 19ms 22 Oct 2024 652nd bthalheim 633 90 22ms 6 Dec 2024 652nd SinArieh 633 90 25ms 4 May 2025 652nd islptng 633 90 23ms 7 Jul 2025 652nd Mr-McChicken 633 90 18ms 4 Oct 2025 652nd NoneTheFewer 633 90 20ms 4 Dec 2025 664th AbelPelser 626 91 23ms 3 Jul 2022 664th Seis 626 91 18ms 9 Dec 2022 664th r-i-c-e 626 91 21ms 9 Jul 2023 664th joshcors 626 91 17ms 30 Jun 2024 664th resoNathan 626 91 16ms 9 Jul 2024 664th jameswmccarty 626 91 21ms 24 Sep 2024 664th hamilton-bonds 626 91 19ms 12 Nov 2024 664th Wonamm 626 91 28ms 14 Feb 2025 672nd TimLeffke 620 92 22ms 17 Aug 2022 672nd Rythoka 620 92 17ms 17 Oct 2022 672nd UriyaBA 620 92 16ms 19 Mar 2023 672nd VladislavGitter 🇪🇸 620 92 19ms 14 Nov 2023 672nd ridingqwerty 🇺🇸 620 92 16ms 22 Dec 2023 672nd Thonoton 620 92 19ms 1 Feb 2024 672nd OCNeve 620 92 19ms 17 Jun 2024 672nd themoonisacheese 620 92 24ms 25 Feb 2025 672nd BabySharkHi 620 92 21ms 22 Apr 2025 672nd arjunarya1 620 92 17ms 28 Aug 2025 672nd TJK-S 620 92 22ms 10 Oct 2025 683rd Bananapants22 613 93 27ms 4 Sep 2022 683rd jaxmattfair 🇺🇸 613 93 18ms 10 Jan 2023 683rd fenix-bear 613 93 20ms 18 Nov 2023 683rd epic-programmer-guy 613 93 23ms 22 Dec 2023 683rd brimstonetrader 613 93 26ms 18 Nov 2024 683rd HunterC14 613 93 28ms 10 Feb 2026 689th atazzam 🇺🇸 606 94 18ms 18 May 2022 689th rohangpta 606 94 16ms 8 Aug 2022 689th shinylego 606 94 24ms 14 Sep 2022 689th sgaltair 606 94 19ms 4 Nov 2022 689th TotoAJ 606 94 19ms 15 Dec 2023 689th Gusic06 606 94 19ms 6 May 2024 689th kyleyarwood 606 94 23ms 6 Oct 2024 689th jj0786-cell 606 94 22ms 1 Apr 2025 689th griffinschreiber 606 94 27ms 1 Apr 2025 689th o800 606 94 18ms 17 Nov 2025 699th felixcroc 600 95 20ms 30 Mar 2023 699th Pyro569 600 95 20ms 4 Jul 2023 699th rm-rf-innocence 600 95 20ms 19 Dec 2023 699th Bit125 600 95 21ms 30 Jan 2024 699th aalec 600 95 23ms 25 Apr 2024 699th strogor 600 95 20ms 13 Jun 2025 699th cthierfelder 🇲🇨 600 95 20ms 17 Jul 2025 699th ThomasDelepine 600 95 23ms 29 Oct 2025 699th professor-l 600 95 16ms 16 days ago 708th karhuthebear 594 96 23ms 9 May 2022 708th qwjhvbxi 594 96 23ms 6 Feb 2024 708th alfonsoalves 594 96 19ms 21 Jul 2024 708th jeff-re 594 96 18ms 1 Apr 2025 712th a-penton 588 97 16ms 22 Sep 2022 712th jrbud 588 97 19ms 6 Jan 2024 712th befoster 588 97 22ms 22 Feb 2024 712th joshua-el-samalouti 🇩🇪 588 97 20ms 26 May 2024 712th luca1339 588 97 19ms 10 Jun 2024 717th lukemalek 582 98 15ms 10 Oct 2022 717th UltimateGuy0987 582 98 20ms 14 Oct 2022 717th TheLazySquid 582 98 20ms 20 Dec 2022 717th 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