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 ><> 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 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 467th IsaacAlexBarden 722 79 25ms 6 Feb 2025 467th taesungh 722 79 23ms 7 Jun 2025 467th benvreeves 722 79 21ms 25 Jul 2025 467th saturzay 722 79 27ms 19 Aug 2025 467th tomh1012 722 79 23ms 3 Dec 2025 467th JesseNoEyes 🇺🇸 722 79 19ms 15 Jan 2026 467th denkyuu1 722 79 20ms 6 days ago 488th j-Ewan 713 80 21ms 13 May 2022 488th osmith93 713 80 33ms 14 Jun 2022 488th hjcafaroUC 713 80 26ms 21 Jun 2022 488th dankleeman 713 80 21ms 8 Aug 2022 488th dillon-duncando 713 80 23ms 4 Oct 2022 488th DrPiranoid 713 80 25ms 11 Nov 2022 488th mdnestor 713 80 24ms 23 Dec 2022 488th Edjyzod 713 80 16ms 7 Mar 2023 488th henry-von-wichert 713 80 26ms 31 Mar 2023 488th Hortaros 713 80 23ms 16 Apr 2023 488th ankeetparikh 713 80 21ms 5 May 2023 488th Neonader 713 80 28ms 9 May 2023 488th nickgza 713 80 18ms 17 Aug 2023 488th MiranDaniel 🇨🇿 713 80 26ms 30 Aug 2023 488th Fanrco 713 80 18ms 31 Aug 2023 488th nyoshe 713 80 20ms 10 Oct 2023 488th AzroyAr 713 80 28ms 28 Dec 2023 488th Alex-Huggett 🇬🇧 713 80 55ms 13 Apr 2024 488th RobertHoeh 713 80 28ms 27 May 2024 488th LorenzoDeGaspari 713 80 23ms 27 May 2024 488th AstroOrbis 713 80 26ms 7 May 2025 488th vgamula 🇺🇦 713 80 22ms 16 Jul 2025 488th imoxyg 713 80 23ms 29 Aug 2025 488th Tristanchaang 713 80 22ms 13 Nov 2025 512th abba23 704 81 26ms 26 May 2022 512th docd 704 81 18ms 8 Aug 2022 512th Smetalo 704 81 26ms 25 Aug 2022 512th glesnick 704 81 23ms 6 Sep 2022 512th Yareeeema 704 81 25ms 3 Nov 2022 512th RandGuy 704 81 26ms 23 Nov 2022 512th GWStuart 704 81 24ms 19 Dec 2022 512th wa1ker38552 704 81 19ms 22 May 2023 512th LimaoC 704 81 24ms 11 Aug 2023 512th robertovers 704 81 23ms 2 Oct 2023 512th HanaEndUser 704 81 19ms 15 Feb 2024 512th Loag 704 81 18ms 22 Sep 2024 512th julian-hoelz 704 81 19ms 23 Sep 2024 512th GoldStar184 704 81 24ms 27 Nov 2024 512th ihatethefrench 704 81 24ms 5 Jan 2025 512th csharpython 704 81 17ms 2 Aug 2025 528th Ailko 🇧🇪 695 82 27ms 12 May 2022 528th joshmoody24 695 82 25ms 12 May 2022 528th andrewgopher 695 82 20ms 25 Jun 2022 528th estomagordo 🇳🇱 695 82 23ms 26 Oct 2022 528th ThatAlo 695 82 25ms 14 Nov 2022 528th twocatsinatrenchcoat 695 82 18ms 29 Nov 2022 528th aid-f 695 82 23ms 21 Mar 2023 528th nooby31415 695 82 20ms 3 Nov 2023 528th henrydukepickle 695 82 18ms 8 Dec 2023 528th amollberg 🇸🇪 695 82 24ms 3 Jan 2024 528th mrmena 🇦🇺 695 82 29ms 19 Mar 2024 528th rifatx 695 82 24ms 16 Jul 2024 528th NicoH76 695 82 18ms 24 Apr 2025 528th 0dyse 695 82 29ms 29 Apr 2025 528th some-function 695 82 18ms 2 Jul 2025 528th jacekwladzinski 695 82 24ms 12 Nov 2025 544th bonevbs 687 83 20ms 8 May 2022 544th feherd 687 83 19ms 20 May 2022 544th pbleich 687 83 24ms 24 Aug 2022 544th RoscoeSmith 687 83 24ms 20 Nov 2022 544th amadeusdotpng 687 83 18ms 22 Apr 2023 544th ross-i 687 83 18ms 5 Jul 2023 544th anonymaew 687 83 27ms 2 Aug 2023 544th mstang107 687 83 24ms 20 Dec 2023 544th LHLaurini 🇧🇷 687 83 19ms 26 Jun 2024 544th C0derX3 🇺🇸 687 83 22ms 18 Sep 2024 544th ComputerKWasTaken 🇺🇸 687 83 23ms 20 Jan 2025 544th Vexxter9 🇳🇱 687 83 57ms 4 Feb 2025 544th CodyKlingler 687 83 23ms 7 Feb 2025 544th OyuDays 687 83 19ms 17 Mar 2025 544th julianreece 687 83 23ms 29 Apr 2025 544th rustykitty 🇺🇸 687 83 21ms 24 Oct 2025 544th Kinkade76 687 83 26ms 20 days ago First Prev 481–560 of 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