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 Dragon Curve 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 Dragon Curve 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 130th ahmetdemirag 🇨🇾 814 70 19ms 9 Jun 2024 130th FranklinJiaChen 814 70 20ms 4 Jul 2024 130th 5cw 🇺🇸 814 70 20ms 13 Jul 2024 130th lgrandco 814 70 21ms 9 Oct 2024 130th snydej 814 70 21ms 21 Nov 2024 130th erikji 814 70 21ms 4 Feb 2025 130th CutSandstone 814 70 19ms 4 Feb 2025 130th xsot 🇸🇬 814 70 23ms 3 May 2025 130th smilesformiles3 814 70 22ms 14 Jun 2025 130th KasperKivimaeki 🇫🇮 814 70 20ms 30 Jun 2025 130th adaGrad1 814 70 20ms 10 Aug 2025 130th EthanJantz 814 70 21ms 10 Aug 2025 130th qpwoeirut 814 70 16ms 10 Aug 2025 130th intgrah 814 70 21ms 23 Sep 2025 130th ryyyn 🇺🇸 814 70 23ms 29 Oct 2025 130th bzijlema 🇳🇱 814 70 21ms 3 Dec 2025 130th blaztoma 🇱🇹 814 70 23ms 16 Feb 2026 130th Googolplexo 🇷🇺 814 70 19ms 25 Mar 2026 130th edsrzf 🇳🇿 814 70 23ms 19 days ago 130th Mikey-Beep 🇬🇧 814 70 31ms 17 days ago 181st StefanHabel 🇨🇦 803 71 20ms 29 Nov 2022 181st nstearns96 🇬🇧 803 71 25ms 11 Jan 2023 181st lelbal 803 71 20ms 26 Aug 2025 181st HETHAT 🇩🇿 803 71 23ms 23 Sep 2025 181st 09cf 803 71 17ms 18 Nov 2025 181st CommandLeo 🇮🇹 803 71 26ms 8 Jan 2026 181st scpchicken 🇵🇼 803 71 17ms 11 days ago 188th sultan 792 72 24ms 6 Jun 2022 188th BlankSpruce 792 72 24ms 9 Sep 2022 188th ValentinCassayre 792 72 21ms 8 Oct 2022 188th mathb0y512 792 72 24ms 1 Dec 2022 188th NoahBolohan 🇨🇦 792 72 24ms 28 Feb 2023 188th Kacarott 🇦🇺 792 72 16ms 24 Mar 2023 188th Fracture17 792 72 20ms 8 Apr 2023 188th ayushdewan 792 72 24ms 7 May 2023 188th cingulataluke 792 72 20ms 27 Aug 2023 188th PeterTillema 🇳🇱 792 72 25ms 17 Oct 2023 188th Glinte 792 72 25ms 11 Dec 2023 188th nanatsu8 792 72 25ms 11 May 2024 188th thej10n 792 72 19ms 12 Jun 2024 188th tobeannouncd 792 72 19ms 25 Apr 2025 188th YAJUE114514 792 72 17ms 15 Aug 2025 188th madex 🇩🇪 792 72 25ms 15 Mar 2026 188th solisolu 792 72 19ms 13 days ago 205th AdamHe17 781 73 22ms 31 May 2022 205th AliceFord 781 73 20ms 2 Jun 2022 205th Natanaelel 🇸🇪 781 73 17ms 16 Jun 2022 205th marcin7Cd 781 73 20ms 27 Jun 2022 205th vhoulbreque 🇫🇷 781 73 22ms 18 Aug 2022 205th tkr-sh 🇰🇵 781 73 22ms 8 Sep 2022 205th jroscoe5 781 73 21ms 15 Sep 2022 205th OhmNomNom 781 73 26ms 7 Oct 2022 205th 0-4849 781 73 22ms 1 Nov 2022 205th M0PKOBKA 781 73 24ms 19 Dec 2022 205th calumacutt 781 73 25ms 19 Dec 2022 205th thehylian 781 73 23ms 2 Jan 2023 205th fynnkroeger 781 73 24ms 6 Jan 2023 205th hunt-g 781 73 20ms 4 Feb 2023 205th jmerle 🇳🇱 781 73 21ms 16 Feb 2023 205th TaserTheFox 🇺🇸 781 73 30ms 14 Mar 2023 205th pinguicula 781 73 20ms 6 Apr 2023 205th TheoKeller1 781 73 24ms 11 Jun 2023 205th eiburns 781 73 24ms 9 Oct 2023 205th htareque 781 73 25ms 13 Oct 2023 205th wearsunscreen 781 73 20ms 18 Oct 2023 205th Grrisly 781 73 20ms 10 Nov 2023 205th m42km 781 73 23ms 11 Nov 2023 205th GeneralPoxter 781 73 20ms 7 Dec 2023 205th logvp 781 73 26ms 12 Jan 2024 205th JoaoFelipe3 781 73 23ms 13 Jan 2024 205th ehulinsky 🇺🇸 781 73 20ms 16 Feb 2024 205th Lewenhaupt 781 73 20ms 23 Feb 2024 205th stertooy 🇧🇪 781 73 22ms 9 Jun 2024 205th jipsong 🇩🇪 781 73 21ms 23 Jul 2024 205th mattyhempstead 781 73 24ms 6 Oct 2024 205th wh3n3v3r 🇨🇿 781 73 20ms 18 Nov 2024 205th klixel 🇨🇦 781 73 21ms 18 Nov 2024 205th tjwrenn 781 73 22ms 10 Dec 2024 205th nullie 781 73 19ms 19 Dec 2024 205th maxgodfrey2004 🇨🇦 781 73 21ms 13 Feb 2025 First Prev 161–240 of 853 Next Last