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 Alphabetic Numbers 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 Rectangle Fill 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 Alphabetic Numbers 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 551st ComputerKWasTaken 🇺🇸 687 83 23ms 20 Jan 2025 551st Vexxter9 🇳🇱 687 83 57ms 4 Feb 2025 551st CodyKlingler 687 83 23ms 7 Feb 2025 551st OyuDays 687 83 19ms 17 Mar 2025 551st julianreece 687 83 23ms 29 Apr 2025 551st rustykitty 🇺🇸 687 83 21ms 24 Oct 2025 551st Kinkade76 687 83 26ms 4 Feb 2026 551st parthm2005 687 83 16ms 16 days ago 551st Apfelvater 687 83 19ms 11 days ago 551st kitotch 687 83 22ms 5 hours ago 571st Feniske 🇫🇷 679 84 20ms 7 Oct 2022 571st Eilonlif 🇮🇱 679 84 22ms 29 Mar 2023 571st mhsaul 679 84 18ms 11 Apr 2023 571st Phyisis 679 84 23ms 30 Apr 2024 571st MaxCastella 🇫🇷 679 84 23ms 11 Oct 2024 571st SURAJMITTAL 679 84 17ms 17 Dec 2024 571st simplylu 679 84 19ms 5 Jan 2025 571st WillowWispy 679 84 22ms 14 Mar 2025 571st VedJosh 679 84 26ms 3 May 2025 571st hetz2625 679 84 26ms 4 May 2025 571st ottav14 679 84 18ms 1 Dec 2025 571st benanlam 679 84 18ms 24 Dec 2025 571st pph-2203 679 84 16ms 18 days ago 584th aazuspan 671 85 19ms 15 Jun 2022 584th myleopard 671 85 23ms 20 Jul 2022 584th LukasFolwarczny 🇨🇿 671 85 23ms 16 Sep 2022 584th aaardwark 671 85 21ms 1 Jun 2025 584th kmathis22 671 85 20ms 10 Sep 2025 589th MichaelMBradley 🇨🇦 663 86 25ms 5 Jun 2022 589th Lemonz-13223 663 86 21ms 21 Sep 2022 589th Bodo171 663 86 24ms 24 Nov 2022 589th shibacho 🇯🇵 663 86 19ms 25 Nov 2022 589th Vaekor 663 86 18ms 9 Jul 2023 589th LeoVanderSteege 663 86 17ms 18 Nov 2023 589th Pale-Vessel 663 86 20ms 18 Dec 2023 589th tik25 663 86 24ms 28 Mar 2024 589th willschremmer 663 86 16ms 27 Apr 2024 589th jamiloBBKing 663 86 25ms 27 Jan 2025 589th AsishKunta 663 86 18ms 1 Apr 2025 589th Hemanthred2005 663 86 18ms 1 Apr 2025 589th Voltrifrodec 🇸🇰 663 86 23ms 19 Apr 2025 589th lurey99 663 86 18ms 23 Apr 2025 589th Alban-Boissard 663 86 23ms 14 Jun 2025 589th Arkadios200 663 86 26ms 21 Sep 2025 589th Andrey2001 663 86 27ms 27 Nov 2025 589th Aquateraneal 🇺🇸 663 86 17ms 8 days ago 607th ToE42 655 87 18ms 19 Oct 2022 607th omri2001 655 87 19ms 19 Oct 2022 607th Skallos-s 655 87 23ms 5 Dec 2022 607th damoc1es 655 87 19ms 16 Apr 2023 607th michelebastione 🇮🇹 655 87 25ms 20 Dec 2023 607th clampcorder 655 87 16ms 24 Jan 2024 607th GitQuick 655 87 19ms 23 Feb 2024 607th EricSchraf 655 87 18ms 21 Mar 2024 607th PotatoSaladOverlord 655 87 19ms 21 May 2025 607th Ibozz91 655 87 23ms 8 Jun 2025 607th chenyuan33 655 87 22ms 23 days ago 618th Andre3582 648 88 17ms 29 Oct 2022 618th Darknova2468 648 88 20ms 20 Nov 2022 618th Solsticely 648 88 20ms 20 Nov 2022 618th goGuru 648 88 20ms 21 Dec 2022 618th msbranicky 648 88 36ms 9 Aug 2023 618th gussy420 648 88 17ms 28 Oct 2023 618th Shynif 648 88 20ms 21 Feb 2024 618th asterized 648 88 19ms 24 Aug 2024 618th hippopotam00sehead 🇨🇦 648 88 19ms 11 Sep 2024 618th 08jne01 648 88 16ms 21 Nov 2024 618th davidludwik2370 648 88 19ms 14 Sep 2025 618th kasarino 648 88 35ms 4 hours ago 630th lovernj 640 89 24ms 23 Aug 2022 630th Roj 640 89 21ms 20 Nov 2022 630th aeonsablaze 640 89 16ms 22 Nov 2022 630th buddyw 640 89 18ms 9 Mar 2023 630th VV1Git 640 89 19ms 28 Mar 2023 630th dranjohn 640 89 19ms 17 Sep 2023 630th ArenaGrenade 640 89 24ms 19 Feb 2024 630th NanduBC 640 89 22ms 6 Sep 2024 630th TheAtrossian 640 89 19ms 5 Jan 2025 630th KimJua41 640 89 21ms 4 May 2025 640th StoverGitHub 633 90 20ms 16 Jun 2022 First Prev 561–640 of 839 Next Last