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 ><> 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 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 555th simplylu 679 84 18ms 5 Jan 2025 555th WillowWispy 679 84 19ms 14 Mar 2025 555th VedJosh 679 84 25ms 3 May 2025 555th hetz2625 679 84 23ms 4 May 2025 555th ottav14 679 84 22ms 1 Dec 2025 555th benanlam 679 84 16ms 24 Dec 2025 567th aazuspan 671 85 23ms 15 Jun 2022 567th myleopard 671 85 21ms 20 Jul 2022 567th LukasFolwarczny 🇨🇿 671 85 22ms 16 Sep 2022 567th aaardwark 671 85 21ms 1 Jun 2025 567th kmathis22 671 85 19ms 10 Sep 2025 572nd MichaelMBradley 🇨🇦 663 86 22ms 5 Jun 2022 572nd Lemonz-13223 663 86 17ms 21 Sep 2022 572nd Bodo171 663 86 24ms 24 Nov 2022 572nd shibacho 🇯🇵 663 86 19ms 25 Nov 2022 572nd Vaekor 663 86 20ms 9 Jul 2023 572nd LeoVanderSteege 663 86 16ms 18 Nov 2023 572nd Pale-Vessel 663 86 18ms 18 Dec 2023 572nd tik25 663 86 27ms 28 Mar 2024 572nd willschremmer 663 86 16ms 27 Apr 2024 572nd jamiloBBKing 663 86 24ms 27 Jan 2025 572nd AsishKunta 663 86 17ms 1 Apr 2025 572nd Hemanthred2005 663 86 18ms 1 Apr 2025 572nd Voltrifrodec 🇸🇰 663 86 22ms 19 Apr 2025 572nd lurey99 663 86 17ms 23 Apr 2025 572nd Alban-Boissard 663 86 23ms 14 Jun 2025 572nd Arkadios200 663 86 25ms 21 Sep 2025 572nd Andrey2001 663 86 24ms 27 Nov 2025 589th ToE42 655 87 17ms 19 Oct 2022 589th omri2001 655 87 22ms 19 Oct 2022 589th Skallos-s 655 87 22ms 5 Dec 2022 589th damoc1es 655 87 16ms 16 Apr 2023 589th michelebastione 🇮🇹 655 87 25ms 20 Dec 2023 589th clampcorder 655 87 17ms 24 Jan 2024 589th GitQuick 655 87 20ms 23 Feb 2024 589th EricSchraf 655 87 18ms 21 Mar 2024 589th PotatoSaladOverlord 655 87 19ms 21 May 2025 589th Ibozz91 655 87 23ms 8 Jun 2025 589th Aquateraneal 655 87 17ms 13 Nov 2025 600th Andre3582 648 88 16ms 29 Oct 2022 600th Darknova2468 648 88 19ms 20 Nov 2022 600th Solsticely 648 88 19ms 20 Nov 2022 600th goGuru 648 88 19ms 21 Dec 2022 600th msbranicky 648 88 34ms 9 Aug 2023 600th gussy420 648 88 17ms 28 Oct 2023 600th Shynif 648 88 18ms 21 Feb 2024 600th asterized 648 88 20ms 24 Aug 2024 600th hippopotam00sehead 🇨🇦 648 88 19ms 11 Sep 2024 600th 08jne01 648 88 16ms 21 Nov 2024 600th davidludwik2370 648 88 19ms 14 Sep 2025 611th lovernj 640 89 23ms 23 Aug 2022 611th Roj 640 89 22ms 20 Nov 2022 611th aeonsablaze 640 89 16ms 22 Nov 2022 611th buddyw 640 89 16ms 9 Mar 2023 611th VV1Git 640 89 19ms 28 Mar 2023 611th dranjohn 640 89 20ms 17 Sep 2023 611th ArenaGrenade 640 89 24ms 19 Feb 2024 611th NanduBC 640 89 21ms 6 Sep 2024 611th TheAtrossian 640 89 20ms 5 Jan 2025 611th KimJua41 640 89 19ms 4 May 2025 611th muser-logiccpu 🇺🇦 640 89 16ms 20 Aug 2025 622nd StoverGitHub 633 90 22ms 16 Jun 2022 622nd jamespeilunli 633 90 26ms 4 Jul 2022 622nd TrentGlimp 633 90 19ms 3 Sep 2022 622nd Ugoran 633 90 18ms 19 Nov 2022 622nd PATTRIM 633 90 17ms 5 Jan 2023 622nd charliegaming 633 90 18ms 3 Oct 2023 622nd lhulinsky 633 90 21ms 22 Oct 2024 622nd bthalheim 633 90 23ms 6 Dec 2024 622nd SinArieh 633 90 23ms 4 May 2025 622nd islptng 633 90 22ms 7 Jul 2025 622nd Mr-McChicken 633 90 16ms 4 Oct 2025 622nd NoneTheFewer 633 90 18ms 4 Dec 2025 634th AbelPelser 626 91 20ms 3 Jul 2022 634th Seis 626 91 18ms 9 Dec 2022 634th r-i-c-e 626 91 19ms 9 Jul 2023 634th joshcors 626 91 16ms 30 Jun 2024 634th resoNathan 626 91 16ms 9 Jul 2024 634th jameswmccarty 626 91 21ms 24 Sep 2024 634th hamilton-bonds 626 91 17ms 12 Nov 2024 First Prev 561–640 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