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 476th DrPiranoid 713 80 22ms 11 Nov 2022 476th mdnestor 713 80 23ms 23 Dec 2022 476th Edjyzod 713 80 16ms 7 Mar 2023 476th henry-von-wichert 713 80 24ms 31 Mar 2023 476th Hortaros 713 80 22ms 16 Apr 2023 476th ankeetparikh 713 80 18ms 5 May 2023 476th Neonader 713 80 25ms 9 May 2023 476th nickgza 713 80 16ms 17 Aug 2023 476th MiranDaniel 🇨🇿 713 80 25ms 30 Aug 2023 476th Fanrco 713 80 17ms 31 Aug 2023 476th nyoshe 713 80 19ms 10 Oct 2023 476th AzroyAr 713 80 26ms 28 Dec 2023 476th Alex-Huggett 🇬🇧 713 80 56ms 13 Apr 2024 476th RobertHoeh 713 80 27ms 27 May 2024 476th LorenzoDeGaspari 713 80 23ms 27 May 2024 476th AstroOrbis 713 80 25ms 7 May 2025 476th vgamula 🇺🇦 713 80 23ms 16 Jul 2025 476th imoxyg 713 80 23ms 29 Aug 2025 476th Tristanchaang 713 80 21ms 13 Nov 2025 500th abba23 704 81 25ms 26 May 2022 500th docd 704 81 20ms 8 Aug 2022 500th Smetalo 704 81 24ms 25 Aug 2022 500th glesnick 704 81 22ms 6 Sep 2022 500th Yareeeema 704 81 27ms 3 Nov 2022 500th RandGuy 704 81 25ms 23 Nov 2022 500th GWStuart 704 81 25ms 19 Dec 2022 500th wa1ker38552 704 81 20ms 22 May 2023 500th LimaoC 704 81 22ms 11 Aug 2023 500th robertovers 704 81 22ms 2 Oct 2023 500th HanaEndUser 704 81 18ms 15 Feb 2024 500th Loag 704 81 17ms 22 Sep 2024 500th julian-hoelz 704 81 17ms 23 Sep 2024 500th JesseNoEyes 🇺🇸 704 81 19ms 4 Oct 2024 500th GoldStar184 704 81 23ms 27 Nov 2024 500th ihatethefrench 704 81 22ms 5 Jan 2025 500th csharpython 704 81 17ms 2 Aug 2025 517th Ailko 🇧🇪 695 82 24ms 12 May 2022 517th joshmoody24 695 82 25ms 12 May 2022 517th andrewgopher 695 82 18ms 25 Jun 2022 517th estomagordo 🇳🇱 695 82 23ms 26 Oct 2022 517th ThatAlo 695 82 23ms 14 Nov 2022 517th twocatsinatrenchcoat 695 82 18ms 29 Nov 2022 517th aid-f 695 82 23ms 21 Mar 2023 517th nooby31415 695 82 19ms 3 Nov 2023 517th henrydukepickle 695 82 18ms 8 Dec 2023 517th amollberg 🇸🇪 695 82 22ms 3 Jan 2024 517th mrmena 🇦🇺 695 82 27ms 19 Mar 2024 517th rifatx 695 82 24ms 16 Jul 2024 517th NicoH76 695 82 17ms 24 Apr 2025 517th 0dyse 695 82 25ms 29 Apr 2025 517th some-function 695 82 16ms 2 Jul 2025 517th jacekwladzinski 695 82 23ms 12 Nov 2025 533rd bonevbs 687 83 22ms 8 May 2022 533rd feherd 687 83 19ms 20 May 2022 533rd pbleich 687 83 23ms 24 Aug 2022 533rd RoscoeSmith 687 83 22ms 20 Nov 2022 533rd amadeusdotpng 687 83 19ms 22 Apr 2023 533rd ross-i 687 83 16ms 5 Jul 2023 533rd anonymaew 687 83 25ms 2 Aug 2023 533rd mstang107 687 83 23ms 20 Dec 2023 533rd LHLaurini 🇧🇷 687 83 18ms 26 Jun 2024 533rd C0derX3 🇺🇸 687 83 20ms 18 Sep 2024 533rd ComputerKWasTaken 🇺🇸 687 83 24ms 20 Jan 2025 533rd Vexxter9 🇳🇱 687 83 55ms 4 Feb 2025 533rd CodyKlingler 687 83 22ms 7 Feb 2025 533rd OyuDays 687 83 19ms 17 Mar 2025 533rd julianreece 687 83 23ms 29 Apr 2025 533rd rustykitty 🇺🇸 687 83 21ms 24 Oct 2025 549th Feniske 🇫🇷 679 84 19ms 7 Oct 2022 549th Eilonlif 🇮🇱 679 84 22ms 29 Mar 2023 549th mhsaul 679 84 16ms 11 Apr 2023 549th Phyisis 679 84 22ms 30 Apr 2024 549th MaxCastella 🇫🇷 679 84 22ms 11 Oct 2024 549th SURAJMITTAL 679 84 18ms 17 Dec 2024 549th simplylu 679 84 18ms 5 Jan 2025 549th WillowWispy 679 84 19ms 14 Mar 2025 549th VedJosh 679 84 25ms 3 May 2025 549th hetz2625 679 84 23ms 4 May 2025 549th ottav14 679 84 22ms 1 Dec 2025 549th benanlam 679 84 16ms 15 days ago First Prev 481–560 of 815 Next Last