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 NFA Simulator 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 NFA Simulator 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 512th some-function 695 82 17ms 2 Jul 2025 512th jacekwladzinski 695 82 25ms 21 days ago 528th bonevbs 687 83 18ms 8 May 2022 528th feherd 687 83 17ms 20 May 2022 528th pbleich 687 83 22ms 24 Aug 2022 528th RoscoeSmith 687 83 24ms 20 Nov 2022 528th amadeusdotpng 687 83 17ms 22 Apr 2023 528th ross-i 687 83 16ms 5 Jul 2023 528th anonymaew 687 83 26ms 2 Aug 2023 528th mstang107 687 83 22ms 20 Dec 2023 528th LHLaurini 🇧🇷 687 83 17ms 26 Jun 2024 528th C0derX3 🇺🇸 687 83 22ms 18 Sep 2024 528th ComputerKWasTaken 🇺🇸 687 83 23ms 20 Jan 2025 528th Vexxter9 🇳🇱 687 83 54ms 4 Feb 2025 528th CodyKlingler 687 83 23ms 7 Feb 2025 528th OyuDays 687 83 19ms 17 Mar 2025 528th julianreece 687 83 20ms 29 Apr 2025 528th rustykitty 🇺🇸 687 83 22ms 24 Oct 2025 544th Feniske 🇫🇷 679 84 18ms 7 Oct 2022 544th Eilonlif 🇮🇱 679 84 22ms 29 Mar 2023 544th mhsaul 679 84 16ms 11 Apr 2023 544th Phyisis 679 84 22ms 30 Apr 2024 544th MaxCastella 🇫🇷 679 84 21ms 11 Oct 2024 544th SURAJMITTAL 679 84 18ms 17 Dec 2024 544th simplylu 679 84 19ms 5 Jan 2025 544th WillowWispy 679 84 19ms 14 Mar 2025 544th VedJosh 679 84 23ms 3 May 2025 544th hetz2625 679 84 23ms 4 May 2025 544th ottav14 679 84 23ms 2 days ago 555th aazuspan 671 85 18ms 15 Jun 2022 555th myleopard 671 85 21ms 20 Jul 2022 555th LukasFolwarczny 🇨🇿 671 85 24ms 16 Sep 2022 555th aaardwark 671 85 19ms 1 Jun 2025 555th kmathis22 671 85 20ms 10 Sep 2025 560th MichaelMBradley 🇨🇦 663 86 24ms 5 Jun 2022 560th Lemonz-13223 663 86 18ms 21 Sep 2022 560th Bodo171 663 86 22ms 24 Nov 2022 560th shibacho 🇯🇵 663 86 18ms 25 Nov 2022 560th Vaekor 663 86 18ms 9 Jul 2023 560th LeoVanderSteege 663 86 16ms 18 Nov 2023 560th Pale-Vessel 663 86 18ms 18 Dec 2023 560th tik25 663 86 24ms 28 Mar 2024 560th willschremmer 663 86 15ms 27 Apr 2024 560th jamiloBBKing 663 86 22ms 27 Jan 2025 560th AsishKunta 663 86 17ms 1 Apr 2025 560th Hemanthred2005 663 86 17ms 1 Apr 2025 560th Voltrifrodec 🇸🇰 663 86 21ms 19 Apr 2025 560th lurey99 663 86 18ms 23 Apr 2025 560th Alban-Boissard 663 86 22ms 14 Jun 2025 560th Arkadios200 663 86 24ms 21 Sep 2025 560th Andrey2001 663 86 25ms 6 days ago 577th ToE42 655 87 17ms 19 Oct 2022 577th omri2001 655 87 17ms 19 Oct 2022 577th Skallos-s 655 87 23ms 5 Dec 2022 577th damoc1es 655 87 18ms 16 Apr 2023 577th michelebastione 🇮🇹 655 87 25ms 20 Dec 2023 577th clampcorder 655 87 16ms 24 Jan 2024 577th GitQuick 655 87 19ms 23 Feb 2024 577th EricSchraf 655 87 17ms 21 Mar 2024 577th PotatoSaladOverlord 655 87 22ms 21 May 2025 577th Ibozz91 655 87 24ms 8 Jun 2025 577th Aquateraneal 655 87 19ms 19 days ago 588th Andre3582 648 88 17ms 29 Oct 2022 588th Darknova2468 648 88 19ms 20 Nov 2022 588th Solsticely 648 88 19ms 20 Nov 2022 588th goGuru 648 88 20ms 21 Dec 2022 588th msbranicky 648 88 35ms 9 Aug 2023 588th gussy420 648 88 17ms 28 Oct 2023 588th Shynif 648 88 19ms 21 Feb 2024 588th asterized 648 88 19ms 24 Aug 2024 588th hippopotam00sehead 🇨🇦 648 88 17ms 11 Sep 2024 588th 08jne01 648 88 16ms 21 Nov 2024 588th davidludwik2370 648 88 18ms 14 Sep 2025 599th lovernj 640 89 22ms 23 Aug 2022 599th Roj 640 89 21ms 20 Nov 2022 First Prev 526–600 of 808 Next Last