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 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 Multitap Input 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 ><> 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 ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 Multitap Input 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 551st ottav14 679 84 22ms 1 Dec 2025 551st benanlam 679 84 16ms 17 days ago 563rd aazuspan 671 85 23ms 15 Jun 2022 563rd myleopard 671 85 21ms 20 Jul 2022 563rd LukasFolwarczny 🇨🇿 671 85 22ms 16 Sep 2022 563rd aaardwark 671 85 21ms 1 Jun 2025 563rd kmathis22 671 85 19ms 10 Sep 2025 568th MichaelMBradley 🇨🇦 663 86 22ms 5 Jun 2022 568th Lemonz-13223 663 86 17ms 21 Sep 2022 568th Bodo171 663 86 24ms 24 Nov 2022 568th shibacho 🇯🇵 663 86 19ms 25 Nov 2022 568th Vaekor 663 86 20ms 9 Jul 2023 568th LeoVanderSteege 663 86 16ms 18 Nov 2023 568th Pale-Vessel 663 86 18ms 18 Dec 2023 568th tik25 663 86 27ms 28 Mar 2024 568th willschremmer 663 86 16ms 27 Apr 2024 568th jamiloBBKing 663 86 24ms 27 Jan 2025 568th AsishKunta 663 86 17ms 1 Apr 2025 568th Hemanthred2005 663 86 18ms 1 Apr 2025 568th Voltrifrodec 🇸🇰 663 86 22ms 19 Apr 2025 568th lurey99 663 86 17ms 23 Apr 2025 568th Alban-Boissard 663 86 23ms 14 Jun 2025 568th Arkadios200 663 86 25ms 21 Sep 2025 568th Andrey2001 663 86 24ms 27 Nov 2025 585th ToE42 655 87 17ms 19 Oct 2022 585th omri2001 655 87 22ms 19 Oct 2022 585th Skallos-s 655 87 22ms 5 Dec 2022 585th damoc1es 655 87 16ms 16 Apr 2023 585th michelebastione 🇮🇹 655 87 25ms 20 Dec 2023 585th clampcorder 655 87 17ms 24 Jan 2024 585th GitQuick 655 87 20ms 23 Feb 2024 585th EricSchraf 655 87 18ms 21 Mar 2024 585th PotatoSaladOverlord 655 87 19ms 21 May 2025 585th Ibozz91 655 87 23ms 8 Jun 2025 585th Aquateraneal 655 87 17ms 13 Nov 2025 596th Andre3582 648 88 16ms 29 Oct 2022 596th Darknova2468 648 88 19ms 20 Nov 2022 596th Solsticely 648 88 19ms 20 Nov 2022 596th goGuru 648 88 19ms 21 Dec 2022 596th msbranicky 648 88 34ms 9 Aug 2023 596th gussy420 648 88 17ms 28 Oct 2023 596th Shynif 648 88 18ms 21 Feb 2024 596th asterized 648 88 20ms 24 Aug 2024 596th hippopotam00sehead 🇨🇦 648 88 19ms 11 Sep 2024 596th 08jne01 648 88 16ms 21 Nov 2024 596th davidludwik2370 648 88 19ms 14 Sep 2025 607th lovernj 640 89 23ms 23 Aug 2022 607th Roj 640 89 22ms 20 Nov 2022 607th aeonsablaze 640 89 16ms 22 Nov 2022 607th buddyw 640 89 16ms 9 Mar 2023 607th VV1Git 640 89 19ms 28 Mar 2023 607th dranjohn 640 89 20ms 17 Sep 2023 607th ArenaGrenade 640 89 24ms 19 Feb 2024 607th NanduBC 640 89 21ms 6 Sep 2024 607th TheAtrossian 640 89 20ms 5 Jan 2025 607th KimJua41 640 89 19ms 4 May 2025 607th Upload-and-View 🇺🇦 640 89 16ms 20 Aug 2025 618th StoverGitHub 633 90 22ms 16 Jun 2022 618th jamespeilunli 633 90 26ms 4 Jul 2022 618th TrentGlimp 633 90 19ms 3 Sep 2022 618th Ugoran 633 90 18ms 19 Nov 2022 618th PATTRIM 633 90 17ms 5 Jan 2023 618th charliegaming 633 90 18ms 3 Oct 2023 618th lhulinsky 633 90 21ms 22 Oct 2024 618th bthalheim 633 90 23ms 6 Dec 2024 618th SinArieh 633 90 23ms 4 May 2025 618th islptng 633 90 22ms 7 Jul 2025 618th Mr-McChicken 633 90 16ms 4 Oct 2025 618th NoneTheFewer 633 90 18ms 4 Dec 2025 630th AbelPelser 626 91 20ms 3 Jul 2022 630th Seis 626 91 18ms 9 Dec 2022 630th r-i-c-e 626 91 19ms 9 Jul 2023 630th joshcors 626 91 16ms 30 Jun 2024 630th resoNathan 626 91 16ms 9 Jul 2024 630th jameswmccarty 626 91 21ms 24 Sep 2024 630th hamilton-bonds 626 91 17ms 12 Nov 2024 630th Wonamm 626 91 26ms 14 Feb 2025 638th TimLeffke 620 92 22ms 17 Aug 2022 638th Rythoka 620 92 14ms 17 Oct 2022 638th UriyaBA 620 92 16ms 19 Mar 2023 First Prev 561–640 of 817 Next 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