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 473rd henry-von-wichert 713 80 24ms 31 Mar 2023 473rd Hortaros 713 80 22ms 16 Apr 2023 473rd ankeetparikh 713 80 18ms 5 May 2023 473rd Neonader 713 80 25ms 9 May 2023 473rd nickgza 713 80 16ms 17 Aug 2023 473rd MiranDaniel 🇨🇿 713 80 25ms 30 Aug 2023 473rd Fanrco 713 80 17ms 31 Aug 2023 473rd nyoshe 713 80 19ms 10 Oct 2023 473rd AzroyAr 713 80 26ms 28 Dec 2023 473rd Alex-Huggett 🇬🇧 713 80 56ms 13 Apr 2024 473rd RobertHoeh 713 80 27ms 27 May 2024 473rd LorenzoDeGaspari 713 80 23ms 27 May 2024 473rd AstroOrbis 713 80 25ms 7 May 2025 473rd vgamula 🇺🇦 713 80 23ms 16 Jul 2025 473rd imoxyg 713 80 23ms 29 Aug 2025 473rd Tristanchaang 713 80 21ms 13 Nov 2025 497th abba23 704 81 25ms 26 May 2022 497th docd 704 81 20ms 8 Aug 2022 497th Smetalo 704 81 24ms 25 Aug 2022 497th glesnick 704 81 22ms 6 Sep 2022 497th Yareeeema 704 81 27ms 3 Nov 2022 497th RandGuy 704 81 25ms 23 Nov 2022 497th GWStuart 704 81 25ms 19 Dec 2022 497th wa1ker38552 704 81 20ms 22 May 2023 497th LimaoC 704 81 22ms 11 Aug 2023 497th robertovers 704 81 22ms 2 Oct 2023 497th HanaEndUser 704 81 18ms 15 Feb 2024 497th Loag 704 81 17ms 22 Sep 2024 497th julian-hoelz 704 81 17ms 23 Sep 2024 497th JesseNoEyes 🇺🇸 704 81 19ms 4 Oct 2024 497th GoldStar184 704 81 23ms 27 Nov 2024 497th ihatethefrench 704 81 22ms 5 Jan 2025 497th csharpython 704 81 17ms 2 Aug 2025 514th Ailko 🇧🇪 695 82 24ms 12 May 2022 514th joshmoody24 695 82 25ms 12 May 2022 514th andrewgopher 695 82 18ms 25 Jun 2022 514th estomagordo 🇳🇱 695 82 23ms 26 Oct 2022 514th ThatAlo 695 82 23ms 14 Nov 2022 514th twocatsinatrenchcoat 695 82 18ms 29 Nov 2022 514th aid-f 695 82 23ms 21 Mar 2023 514th nooby31415 695 82 19ms 3 Nov 2023 514th henrydukepickle 695 82 18ms 8 Dec 2023 514th amollberg 🇸🇪 695 82 22ms 3 Jan 2024 514th mrmena 🇦🇺 695 82 27ms 19 Mar 2024 514th rifatx 695 82 24ms 16 Jul 2024 514th NicoH76 695 82 17ms 24 Apr 2025 514th 0dyse 695 82 25ms 29 Apr 2025 514th some-function 695 82 16ms 2 Jul 2025 514th jacekwladzinski 695 82 23ms 12 Nov 2025 530th bonevbs 687 83 22ms 8 May 2022 530th feherd 687 83 19ms 20 May 2022 530th pbleich 687 83 23ms 24 Aug 2022 530th RoscoeSmith 687 83 22ms 20 Nov 2022 530th amadeusdotpng 687 83 19ms 22 Apr 2023 530th ross-i 687 83 16ms 5 Jul 2023 530th anonymaew 687 83 25ms 2 Aug 2023 530th mstang107 687 83 23ms 20 Dec 2023 530th LHLaurini 🇧🇷 687 83 18ms 26 Jun 2024 530th C0derX3 🇺🇸 687 83 20ms 18 Sep 2024 530th ComputerKWasTaken 🇺🇸 687 83 24ms 20 Jan 2025 530th Vexxter9 🇳🇱 687 83 55ms 4 Feb 2025 530th CodyKlingler 687 83 22ms 7 Feb 2025 530th OyuDays 687 83 19ms 17 Mar 2025 530th julianreece 687 83 23ms 29 Apr 2025 530th rustykitty 🇺🇸 687 83 21ms 24 Oct 2025 546th Feniske 🇫🇷 679 84 19ms 7 Oct 2022 546th Eilonlif 🇮🇱 679 84 22ms 29 Mar 2023 546th mhsaul 679 84 16ms 11 Apr 2023 546th Phyisis 679 84 22ms 30 Apr 2024 546th MaxCastella 🇫🇷 679 84 22ms 11 Oct 2024 546th SURAJMITTAL 679 84 18ms 17 Dec 2024 546th simplylu 679 84 18ms 5 Jan 2025 546th WillowWispy 679 84 19ms 14 Mar 2025 546th VedJosh 679 84 25ms 3 May 2025 546th hetz2625 679 84 23ms 4 May 2025 546th ottav14 679 84 22ms 17 days ago 557th aazuspan 671 85 23ms 15 Jun 2022 557th myleopard 671 85 21ms 20 Jul 2022 557th LukasFolwarczny 🇨🇿 671 85 22ms 16 Sep 2022 557th aaardwark 671 85 21ms 1 Jun 2025 First Prev 481–560 of 810 Next Last