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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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) Taxicab Numbers 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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) Taxicab Numbers 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 484th saturzay 722 79 27ms 19 Aug 2025 484th tomh1012 722 79 24ms 3 Dec 2025 484th JesseNoEyes 🇺🇸 722 79 20ms 15 Jan 2026 484th milktea-ish 722 79 22ms 5 Mar 2026 505th j-Ewan 713 80 21ms 13 May 2022 505th osmith93 713 80 35ms 14 Jun 2022 505th hjcafaroUC 713 80 26ms 21 Jun 2022 505th dankleeman 713 80 19ms 8 Aug 2022 505th dillon-duncando 713 80 22ms 4 Oct 2022 505th DrPiranoid 713 80 24ms 11 Nov 2022 505th mdnestor 713 80 23ms 23 Dec 2022 505th Edjyzod 713 80 17ms 7 Mar 2023 505th henry-von-wichert 713 80 25ms 31 Mar 2023 505th Hortaros 713 80 21ms 16 Apr 2023 505th ankeetparikh 713 80 20ms 5 May 2023 505th Neonader 713 80 26ms 9 May 2023 505th nickgza 713 80 18ms 17 Aug 2023 505th MiranDaniel 🇨🇿 713 80 27ms 30 Aug 2023 505th Fanrco 713 80 19ms 31 Aug 2023 505th nyoshe 713 80 20ms 10 Oct 2023 505th AzroyAr 713 80 28ms 28 Dec 2023 505th Alex-Huggett 🇬🇧 713 80 58ms 13 Apr 2024 505th RobertHoeh 713 80 27ms 27 May 2024 505th LorenzoDeGaspari 713 80 24ms 27 May 2024 505th AstroOrbis 713 80 28ms 7 May 2025 505th vgamula 🇺🇦 713 80 23ms 16 Jul 2025 505th imoxyg 713 80 29ms 29 Aug 2025 505th Tristanchaang 713 80 22ms 13 Nov 2025 505th someCoder-a11y 713 80 17ms 13 days ago 505th Seltos7224 713 80 27ms 6 mins ago 531st abba23 704 81 28ms 26 May 2022 531st docd 704 81 19ms 8 Aug 2022 531st Smetalo 704 81 29ms 25 Aug 2022 531st glesnick 704 81 25ms 6 Sep 2022 531st Yareeeema 704 81 25ms 3 Nov 2022 531st RandGuy 704 81 27ms 23 Nov 2022 531st GWStuart 704 81 25ms 19 Dec 2022 531st wa1ker38552 704 81 21ms 22 May 2023 531st LimaoC 704 81 23ms 11 Aug 2023 531st robertovers 704 81 24ms 2 Oct 2023 531st HanaEndUser 704 81 20ms 15 Feb 2024 531st Loag 704 81 19ms 22 Sep 2024 531st julian-hoelz 704 81 18ms 23 Sep 2024 531st GoldStar184 704 81 23ms 27 Nov 2024 531st mchalunderscore 704 81 24ms 5 Jan 2025 531st csharpython 704 81 15ms 2 Aug 2025 531st ImanolCiganda 704 81 27ms 26 Feb 2026 548th Ailko 🇧🇪 695 82 27ms 12 May 2022 548th joshmoody24 695 82 27ms 12 May 2022 548th andrewgopher 695 82 20ms 25 Jun 2022 548th estomagordo 🇳🇱 695 82 25ms 26 Oct 2022 548th ellis-rix 695 82 25ms 14 Nov 2022 548th twocatsinatrenchcoat 695 82 19ms 29 Nov 2022 548th aid-f 695 82 24ms 21 Mar 2023 548th nooby31415 695 82 20ms 3 Nov 2023 548th henrydukepickle 695 82 18ms 8 Dec 2023 548th amollberg 🇸🇪 695 82 25ms 3 Jan 2024 548th mrmena 🇦🇺 695 82 29ms 19 Mar 2024 548th rifatx 695 82 26ms 16 Jul 2024 548th NicoH76 695 82 19ms 24 Apr 2025 548th 0dyse 695 82 27ms 29 Apr 2025 548th some-function 695 82 21ms 2 Jul 2025 548th jacekwladzinski 695 82 25ms 12 Nov 2025 548th Arkadios200 695 82 31ms 23 days ago 565th bonevbs 687 83 22ms 8 May 2022 565th feherd 687 83 19ms 20 May 2022 565th pbleich 687 83 24ms 24 Aug 2022 565th RoscoeSmith 687 83 26ms 20 Nov 2022 565th amadeusdotpng 687 83 19ms 22 Apr 2023 565th ross-i 687 83 19ms 5 Jul 2023 565th anonymaew 687 83 26ms 2 Aug 2023 565th mstang107 687 83 23ms 20 Dec 2023 565th LHLaurini 🇧🇷 687 83 18ms 26 Jun 2024 565th C0derX3 🇺🇸 687 83 22ms 18 Sep 2024 565th ComputerKWasTaken 🇺🇸 687 83 27ms 20 Jan 2025 565th Vexxter9 🇳🇱 687 83 58ms 4 Feb 2025 565th CodyKlingler 687 83 25ms 7 Feb 2025 565th OyuDays 687 83 21ms 17 Mar 2025 565th julianreece 687 83 23ms 29 Apr 2025 565th rustykitty 🇺🇸 687 83 22ms 24 Oct 2025 565th Kinkade76 687 83 36ms 4 Feb 2026 565th parthm2005 687 83 18ms 28 Feb 2026 565th Apfelvater 687 83 28ms 5 Mar 2026 565th kitotch 687 83 24ms 17 Mar 2026 585th Feniske 🇫🇷 679 84 20ms 7 Oct 2022 585th Eilonlif 🇮🇱 679 84 23ms 29 Mar 2023 585th mhsaul 679 84 17ms 11 Apr 2023 585th Phyisis 679 84 22ms 30 Apr 2024 585th MaxCastella 🇫🇷 679 84 23ms 11 Oct 2024 585th SURAJMITTAL 679 84 17ms 17 Dec 2024 585th simplylu 679 84 20ms 5 Jan 2025 585th WillowWispy 679 84 22ms 14 Mar 2025 585th VedJosh 679 84 25ms 3 May 2025 585th hetz2625 679 84 25ms 4 May 2025 585th ottav14 679 84 21ms 1 Dec 2025 585th benanlam 679 84 21ms 24 Dec 2025 585th pph-2203 679 84 17ms 26 Feb 2026 598th aazuspan 671 85 19ms 15 Jun 2022 598th myleopard 671 85 22ms 20 Jul 2022 598th LukasFolwarczny 🇨🇿 671 85 26ms 16 Sep 2022 First Prev 501–600 of 854 Next Last