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) 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab 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) 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 126th snydej 814 70 20ms 21 Nov 2024 126th erikji 814 70 20ms 4 Feb 2025 126th CutSandstone 814 70 20ms 4 Feb 2025 126th xsot 🇸🇬 814 70 23ms 3 May 2025 126th smilesformiles3 814 70 21ms 14 Jun 2025 126th KasperKivimaeki 🇫🇮 814 70 20ms 30 Jun 2025 126th adaGrad1 814 70 19ms 10 Aug 2025 126th EthanJantz 814 70 19ms 10 Aug 2025 126th qpwoeirut 814 70 16ms 10 Aug 2025 126th intgrah 814 70 20ms 23 Sep 2025 126th ryyyn 🇺🇸 814 70 19ms 29 Oct 2025 126th bzijlema 🇳🇱 814 70 20ms 3 Dec 2025 126th blaztoma 🇱🇹 814 70 21ms 16 Feb 2026 126th Googolplexo 🇷🇺 814 70 19ms 7 days ago 175th StefanHabel 🇨🇦 803 71 18ms 29 Nov 2022 175th nstearns96 🇬🇧 803 71 21ms 11 Jan 2023 175th lelbal 803 71 20ms 26 Aug 2025 175th HETHAT 🇩🇿 803 71 23ms 23 Sep 2025 175th 09cf 803 71 18ms 18 Nov 2025 175th CommandLeo 🇮🇹 803 71 23ms 8 Jan 2026 181st scpchicken 🇵🇼 792 72 20ms 4 May 2022 181st sultan 792 72 17ms 6 Jun 2022 181st BlankSpruce 792 72 24ms 9 Sep 2022 181st ValentinCassayre 792 72 21ms 8 Oct 2022 181st mathb0y512 792 72 22ms 1 Dec 2022 181st NoahBolohan 🇨🇦 792 72 23ms 28 Feb 2023 181st Kacarott 🇦🇺 792 72 17ms 24 Mar 2023 181st Fracture17 792 72 19ms 8 Apr 2023 181st ayushdewan 792 72 25ms 7 May 2023 181st cingulataluke 792 72 20ms 27 Aug 2023 181st PeterTillema 🇳🇱 792 72 25ms 17 Oct 2023 181st Glinte 792 72 24ms 11 Dec 2023 181st nanatsu8 792 72 26ms 11 May 2024 181st thej10n 792 72 20ms 12 Jun 2024 181st tobeannouncd 792 72 18ms 25 Apr 2025 181st YAJUE114514 792 72 17ms 15 Aug 2025 181st madex 🇩🇪 792 72 23ms 16 days ago 198th AdamHe17 781 73 21ms 31 May 2022 198th AliceFord 781 73 21ms 2 Jun 2022 198th Natanaelel 🇸🇪 781 73 16ms 16 Jun 2022 198th marcin7Cd 781 73 21ms 27 Jun 2022 198th vhoulbreque 🇫🇷 781 73 20ms 18 Aug 2022 198th tkr-sh 🇰🇵 781 73 20ms 8 Sep 2022 198th jroscoe5 781 73 20ms 15 Sep 2022 198th OhmNomNom 781 73 23ms 7 Oct 2022 198th 0-4849 781 73 21ms 1 Nov 2022 198th M0PKOBKA 781 73 25ms 19 Dec 2022 198th calumacutt 781 73 24ms 19 Dec 2022 198th thehylian 781 73 20ms 2 Jan 2023 198th fynnkroeger 781 73 22ms 6 Jan 2023 198th hunt-g 781 73 21ms 4 Feb 2023 198th jmerle 🇳🇱 781 73 20ms 16 Feb 2023 198th TaserTheFox 🇺🇸 781 73 20ms 14 Mar 2023 198th pinguicula 781 73 21ms 6 Apr 2023 198th TheoKeller1 781 73 24ms 11 Jun 2023 198th Mikey-Beep 🇬🇧 781 73 21ms 31 Aug 2023 198th eiburns 781 73 22ms 9 Oct 2023 198th htareque 781 73 21ms 13 Oct 2023 198th wearsunscreen 781 73 22ms 18 Oct 2023 198th Grrisly 781 73 20ms 10 Nov 2023 198th m42km 781 73 20ms 11 Nov 2023 198th GeneralPoxter 781 73 20ms 7 Dec 2023 198th logvp 781 73 24ms 12 Jan 2024 198th JoaoFelipe3 781 73 22ms 13 Jan 2024 198th ehulinsky 🇺🇸 781 73 21ms 16 Feb 2024 198th Lewenhaupt 781 73 19ms 23 Feb 2024 198th stertooy 🇧🇪 781 73 20ms 9 Jun 2024 198th jipsong 🇩🇪 781 73 20ms 23 Jul 2024 198th mattyhempstead 781 73 21ms 6 Oct 2024 198th wh3n3v3r 🇨🇿 781 73 20ms 18 Nov 2024 198th klixel 🇨🇦 781 73 20ms 18 Nov 2024 198th tjwrenn 781 73 20ms 10 Dec 2024 198th nullie 781 73 20ms 19 Dec 2024 198th maxgodfrey2004 🇨🇦 781 73 21ms 13 Feb 2025 198th andrewjc2000 781 73 21ms 23 Feb 2025 198th Bulmenisaurus 781 73 23ms 2 Mar 2025 198th souta-1326 781 73 21ms 1 Apr 2025 198th BenjaminHGong 781 73 21ms 26 May 2025 198th FEZfan 🇦🇺 781 73 20ms 11 Jul 2025 198th wuduculfre 781 73 21ms 28 Jul 2025 First Prev 161–240 of 844 Next Last