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 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 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 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 Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 548th OyuDays 687 83 19ms 17 Mar 2025 548th julianreece 687 83 23ms 29 Apr 2025 548th rustykitty 🇺🇸 687 83 21ms 24 Oct 2025 548th Kinkade76 687 83 26ms 25 days ago 548th parthm2005 687 83 16ms 42 hours ago 566th Feniske 🇫🇷 679 84 20ms 7 Oct 2022 566th Eilonlif 🇮🇱 679 84 22ms 29 Mar 2023 566th mhsaul 679 84 18ms 11 Apr 2023 566th Phyisis 679 84 23ms 30 Apr 2024 566th MaxCastella 🇫🇷 679 84 23ms 11 Oct 2024 566th SURAJMITTAL 679 84 17ms 17 Dec 2024 566th simplylu 679 84 19ms 5 Jan 2025 566th WillowWispy 679 84 22ms 14 Mar 2025 566th VedJosh 679 84 26ms 3 May 2025 566th hetz2625 679 84 26ms 4 May 2025 566th ottav14 679 84 18ms 1 Dec 2025 566th benanlam 679 84 18ms 24 Dec 2025 566th pph-2203 679 84 16ms 3 days ago 579th aazuspan 671 85 19ms 15 Jun 2022 579th myleopard 671 85 23ms 20 Jul 2022 579th LukasFolwarczny 🇨🇿 671 85 23ms 16 Sep 2022 579th aaardwark 671 85 21ms 1 Jun 2025 579th kmathis22 671 85 20ms 10 Sep 2025 584th MichaelMBradley 🇨🇦 663 86 25ms 5 Jun 2022 584th Lemonz-13223 663 86 21ms 21 Sep 2022 584th Bodo171 663 86 24ms 24 Nov 2022 584th shibacho 🇯🇵 663 86 19ms 25 Nov 2022 584th Vaekor 663 86 18ms 9 Jul 2023 584th LeoVanderSteege 663 86 17ms 18 Nov 2023 584th Pale-Vessel 663 86 20ms 18 Dec 2023 584th tik25 663 86 24ms 28 Mar 2024 584th willschremmer 663 86 16ms 27 Apr 2024 584th jamiloBBKing 663 86 25ms 27 Jan 2025 584th AsishKunta 663 86 18ms 1 Apr 2025 584th Hemanthred2005 663 86 18ms 1 Apr 2025 584th Voltrifrodec 🇸🇰 663 86 23ms 19 Apr 2025 584th lurey99 663 86 18ms 23 Apr 2025 584th Alban-Boissard 663 86 23ms 14 Jun 2025 584th Arkadios200 663 86 26ms 21 Sep 2025 584th Andrey2001 663 86 27ms 27 Nov 2025 601st ToE42 655 87 18ms 19 Oct 2022 601st omri2001 655 87 19ms 19 Oct 2022 601st Skallos-s 655 87 23ms 5 Dec 2022 601st damoc1es 655 87 19ms 16 Apr 2023 601st michelebastione 🇮🇹 655 87 25ms 20 Dec 2023 601st clampcorder 655 87 16ms 24 Jan 2024 601st GitQuick 655 87 19ms 23 Feb 2024 601st EricSchraf 655 87 18ms 21 Mar 2024 601st PotatoSaladOverlord 655 87 19ms 21 May 2025 601st Ibozz91 655 87 23ms 8 Jun 2025 601st Aquateraneal 655 87 17ms 13 Nov 2025 601st chenyuan33 655 87 22ms 8 days ago 613th Andre3582 648 88 17ms 29 Oct 2022 613th Darknova2468 648 88 20ms 20 Nov 2022 613th Solsticely 648 88 20ms 20 Nov 2022 613th goGuru 648 88 20ms 21 Dec 2022 613th msbranicky 648 88 36ms 9 Aug 2023 613th gussy420 648 88 17ms 28 Oct 2023 613th Shynif 648 88 20ms 21 Feb 2024 613th asterized 648 88 19ms 24 Aug 2024 613th hippopotam00sehead 🇨🇦 648 88 19ms 11 Sep 2024 613th 08jne01 648 88 16ms 21 Nov 2024 613th davidludwik2370 648 88 19ms 14 Sep 2025 624th lovernj 640 89 24ms 23 Aug 2022 624th Roj 640 89 21ms 20 Nov 2022 624th aeonsablaze 640 89 16ms 22 Nov 2022 624th buddyw 640 89 18ms 9 Mar 2023 624th VV1Git 640 89 19ms 28 Mar 2023 624th dranjohn 640 89 19ms 17 Sep 2023 624th ArenaGrenade 640 89 24ms 19 Feb 2024 624th NanduBC 640 89 22ms 6 Sep 2024 624th TheAtrossian 640 89 19ms 5 Jan 2025 624th KimJua41 640 89 21ms 4 May 2025 634th StoverGitHub 633 90 20ms 16 Jun 2022 634th jamespeilunli 633 90 23ms 4 Jul 2022 634th TrentGlimp 633 90 20ms 3 Sep 2022 634th Ugoran 633 90 20ms 19 Nov 2022 634th PATTRIM 633 90 17ms 5 Jan 2023 634th charliegaming 633 90 19ms 3 Oct 2023 634th lhulinsky 633 90 20ms 22 Oct 2024 First Prev 561–640 of 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