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 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 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 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 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 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 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 561st Feniske 🇫🇷 679 84 20ms 7 Oct 2022 561st Eilonlif 🇮🇱 679 84 22ms 29 Mar 2023 561st mhsaul 679 84 18ms 11 Apr 2023 561st Phyisis 679 84 23ms 30 Apr 2024 561st MaxCastella 🇫🇷 679 84 23ms 11 Oct 2024 561st SURAJMITTAL 679 84 17ms 17 Dec 2024 561st simplylu 679 84 19ms 5 Jan 2025 561st WillowWispy 679 84 22ms 14 Mar 2025 561st VedJosh 679 84 26ms 3 May 2025 561st hetz2625 679 84 26ms 4 May 2025 561st ottav14 679 84 18ms 1 Dec 2025 561st benanlam 679 84 18ms 24 Dec 2025 573rd aazuspan 671 85 19ms 15 Jun 2022 573rd myleopard 671 85 23ms 20 Jul 2022 573rd LukasFolwarczny 🇨🇿 671 85 23ms 16 Sep 2022 573rd aaardwark 671 85 21ms 1 Jun 2025 573rd kmathis22 671 85 20ms 10 Sep 2025 578th MichaelMBradley 🇨🇦 663 86 25ms 5 Jun 2022 578th Lemonz-13223 663 86 21ms 21 Sep 2022 578th Bodo171 663 86 24ms 24 Nov 2022 578th shibacho 🇯🇵 663 86 19ms 25 Nov 2022 578th Vaekor 663 86 18ms 9 Jul 2023 578th LeoVanderSteege 663 86 17ms 18 Nov 2023 578th Pale-Vessel 663 86 20ms 18 Dec 2023 578th tik25 663 86 24ms 28 Mar 2024 578th willschremmer 663 86 16ms 27 Apr 2024 578th jamiloBBKing 663 86 25ms 27 Jan 2025 578th AsishKunta 663 86 18ms 1 Apr 2025 578th Hemanthred2005 663 86 18ms 1 Apr 2025 578th Voltrifrodec 🇸🇰 663 86 23ms 19 Apr 2025 578th lurey99 663 86 18ms 23 Apr 2025 578th Alban-Boissard 663 86 23ms 14 Jun 2025 578th Arkadios200 663 86 26ms 21 Sep 2025 578th Andrey2001 663 86 27ms 27 Nov 2025 595th ToE42 655 87 18ms 19 Oct 2022 595th omri2001 655 87 19ms 19 Oct 2022 595th Skallos-s 655 87 23ms 5 Dec 2022 595th damoc1es 655 87 19ms 16 Apr 2023 595th michelebastione 🇮🇹 655 87 25ms 20 Dec 2023 595th clampcorder 655 87 16ms 24 Jan 2024 595th GitQuick 655 87 19ms 23 Feb 2024 595th EricSchraf 655 87 18ms 21 Mar 2024 595th PotatoSaladOverlord 655 87 19ms 21 May 2025 595th Ibozz91 655 87 23ms 8 Jun 2025 595th Aquateraneal 655 87 17ms 13 Nov 2025 595th chenyuan33 655 87 22ms 3 days ago 607th Andre3582 648 88 17ms 29 Oct 2022 607th Darknova2468 648 88 20ms 20 Nov 2022 607th Solsticely 648 88 20ms 20 Nov 2022 607th goGuru 648 88 20ms 21 Dec 2022 607th msbranicky 648 88 36ms 9 Aug 2023 607th gussy420 648 88 17ms 28 Oct 2023 607th Shynif 648 88 20ms 21 Feb 2024 607th asterized 648 88 19ms 24 Aug 2024 607th hippopotam00sehead 🇨🇦 648 88 19ms 11 Sep 2024 607th 08jne01 648 88 16ms 21 Nov 2024 607th davidludwik2370 648 88 19ms 14 Sep 2025 607th SectorCorruptor 648 88 22ms 14 days ago 619th lovernj 640 89 24ms 23 Aug 2022 619th Roj 640 89 21ms 20 Nov 2022 619th aeonsablaze 640 89 16ms 22 Nov 2022 619th buddyw 640 89 18ms 9 Mar 2023 619th VV1Git 640 89 19ms 28 Mar 2023 619th dranjohn 640 89 19ms 17 Sep 2023 619th ArenaGrenade 640 89 24ms 19 Feb 2024 619th NanduBC 640 89 22ms 6 Sep 2024 619th TheAtrossian 640 89 19ms 5 Jan 2025 619th KimJua41 640 89 21ms 4 May 2025 629th StoverGitHub 633 90 20ms 16 Jun 2022 629th jamespeilunli 633 90 23ms 4 Jul 2022 629th TrentGlimp 633 90 20ms 3 Sep 2022 629th Ugoran 633 90 20ms 19 Nov 2022 629th PATTRIM 633 90 17ms 5 Jan 2023 629th charliegaming 633 90 19ms 3 Oct 2023 629th lhulinsky 633 90 20ms 22 Oct 2024 629th bthalheim 633 90 21ms 6 Dec 2024 629th SinArieh 633 90 25ms 4 May 2025 629th islptng 633 90 23ms 7 Jul 2025 629th Mr-McChicken 633 90 17ms 4 Oct 2025 629th NoneTheFewer 633 90 18ms 4 Dec 2025 First Prev 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