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 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 Calendar 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 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 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 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 Calendar 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 557th kmathis22 671 85 19ms 10 Sep 2025 562nd MichaelMBradley 🇨🇦 663 86 22ms 5 Jun 2022 562nd Lemonz-13223 663 86 17ms 21 Sep 2022 562nd Bodo171 663 86 24ms 24 Nov 2022 562nd shibacho 🇯🇵 663 86 19ms 25 Nov 2022 562nd Vaekor 663 86 20ms 9 Jul 2023 562nd LeoVanderSteege 663 86 16ms 18 Nov 2023 562nd Pale-Vessel 663 86 18ms 18 Dec 2023 562nd tik25 663 86 27ms 28 Mar 2024 562nd willschremmer 663 86 16ms 27 Apr 2024 562nd jamiloBBKing 663 86 24ms 27 Jan 2025 562nd AsishKunta 663 86 17ms 1 Apr 2025 562nd Hemanthred2005 663 86 18ms 1 Apr 2025 562nd Voltrifrodec 🇸🇰 663 86 22ms 19 Apr 2025 562nd lurey99 663 86 17ms 23 Apr 2025 562nd Alban-Boissard 663 86 23ms 14 Jun 2025 562nd Arkadios200 663 86 25ms 21 Sep 2025 562nd Andrey2001 663 86 24ms 20 days ago 579th ToE42 655 87 17ms 19 Oct 2022 579th omri2001 655 87 22ms 19 Oct 2022 579th Skallos-s 655 87 22ms 5 Dec 2022 579th damoc1es 655 87 16ms 16 Apr 2023 579th michelebastione 🇮🇹 655 87 25ms 20 Dec 2023 579th clampcorder 655 87 17ms 24 Jan 2024 579th GitQuick 655 87 20ms 23 Feb 2024 579th EricSchraf 655 87 18ms 21 Mar 2024 579th PotatoSaladOverlord 655 87 19ms 21 May 2025 579th Ibozz91 655 87 23ms 8 Jun 2025 579th Aquateraneal 655 87 17ms 13 Nov 2025 590th Andre3582 648 88 16ms 29 Oct 2022 590th Darknova2468 648 88 19ms 20 Nov 2022 590th Solsticely 648 88 19ms 20 Nov 2022 590th goGuru 648 88 19ms 21 Dec 2022 590th msbranicky 648 88 34ms 9 Aug 2023 590th gussy420 648 88 17ms 28 Oct 2023 590th Shynif 648 88 18ms 21 Feb 2024 590th asterized 648 88 20ms 24 Aug 2024 590th hippopotam00sehead 🇨🇦 648 88 19ms 11 Sep 2024 590th 08jne01 648 88 16ms 21 Nov 2024 590th davidludwik2370 648 88 19ms 14 Sep 2025 601st lovernj 640 89 23ms 23 Aug 2022 601st Roj 640 89 22ms 20 Nov 2022 601st aeonsablaze 640 89 16ms 22 Nov 2022 601st buddyw 640 89 16ms 9 Mar 2023 601st VV1Git 640 89 19ms 28 Mar 2023 601st dranjohn 640 89 20ms 17 Sep 2023 601st ArenaGrenade 640 89 24ms 19 Feb 2024 601st NanduBC 640 89 21ms 6 Sep 2024 601st TheAtrossian 640 89 20ms 5 Jan 2025 601st KimJua41 640 89 19ms 4 May 2025 601st Upload-and-View 🇺🇦 640 89 16ms 20 Aug 2025 612th StoverGitHub 633 90 22ms 16 Jun 2022 612th jamespeilunli 633 90 26ms 4 Jul 2022 612th TrentGlimp 633 90 19ms 3 Sep 2022 612th Ugoran 633 90 18ms 19 Nov 2022 612th PATTRIM 633 90 17ms 5 Jan 2023 612th charliegaming 633 90 18ms 3 Oct 2023 612th lhulinsky 633 90 21ms 22 Oct 2024 612th bthalheim 633 90 23ms 6 Dec 2024 612th SinArieh 633 90 23ms 4 May 2025 612th islptng 633 90 22ms 7 Jul 2025 612th Mr-McChicken 633 90 16ms 4 Oct 2025 612th NoneTheFewer 633 90 18ms 13 days ago 624th AbelPelser 626 91 20ms 3 Jul 2022 624th Seis 626 91 18ms 9 Dec 2022 624th r-i-c-e 626 91 19ms 9 Jul 2023 624th joshcors 626 91 16ms 30 Jun 2024 624th resoNathan 626 91 16ms 9 Jul 2024 624th jameswmccarty 626 91 21ms 24 Sep 2024 624th hamilton-bonds 626 91 17ms 12 Nov 2024 624th Wonamm 626 91 26ms 14 Feb 2025 632nd TimLeffke 620 92 22ms 17 Aug 2022 632nd Rythoka 620 92 14ms 17 Oct 2022 632nd UriyaBA 620 92 16ms 19 Mar 2023 632nd VladislavGitter 🇪🇸 620 92 18ms 14 Nov 2023 632nd ridingqwerty 🇺🇸 620 92 17ms 22 Dec 2023 632nd Thonoton 620 92 18ms 1 Feb 2024 632nd OCNeve 620 92 19ms 17 Jun 2024 632nd themoonisacheese 620 92 22ms 25 Feb 2025 632nd BabySharkHi 620 92 20ms 22 Apr 2025 First Prev 561–640 of 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