Collatz in Python in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 Calendar Connect Four 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 Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 Calendar Connect Four 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 Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 514th CodyKlingler 819 83 24ms 7 Feb 2025 514th OyuDays 819 83 19ms 17 Mar 2025 514th julianreece 819 83 22ms 29 Apr 2025 514th jacekwladzinski 819 83 36ms 2 Oct 2025 514th rustykitty 🇺🇸 819 83 22ms 8 days ago 531st Feniske 🇫🇷 810 84 23ms 7 Oct 2022 531st Eilonlif 🇮🇱 810 84 30ms 29 Mar 2023 531st mhsaul 810 84 17ms 11 Apr 2023 531st Phyisis 810 84 20ms 30 Apr 2024 531st MaxCastella 🇫🇷 810 84 23ms 11 Oct 2024 531st SURAJMITTAL 810 84 27ms 17 Dec 2024 531st simplylu 810 84 20ms 5 Jan 2025 531st WillowWispy 810 84 20ms 14 Mar 2025 531st VedJosh 810 84 25ms 3 May 2025 531st hetz2625 810 84 22ms 4 May 2025 541st aazuspan 800 85 20ms 15 Jun 2022 541st myleopard 800 85 22ms 20 Jul 2022 541st LukasFolwarczny 🇨🇿 800 85 30ms 16 Sep 2022 541st SB-945 800 85 25ms 7 Feb 2024 541st aaardwark 800 85 23ms 1 Jun 2025 541st kmathis22 800 85 20ms 10 Sep 2025 547th MichaelMBradley 🇨🇦 791 86 24ms 5 Jun 2022 547th Lemonz-13223 791 86 27ms 21 Sep 2022 547th Bodo171 791 86 24ms 24 Nov 2022 547th shibacho 🇯🇵 791 86 19ms 25 Nov 2022 547th Vaekor 791 86 21ms 9 Jul 2023 547th LeoVanderSteege 791 86 17ms 18 Nov 2023 547th Pale-Vessel 791 86 20ms 18 Dec 2023 547th tik25 791 86 25ms 28 Mar 2024 547th willschremmer 791 86 18ms 27 Apr 2024 547th jamiloBBKing 791 86 24ms 27 Jan 2025 547th AsishKunta 791 86 19ms 1 Apr 2025 547th Hemanthred2005 791 86 18ms 1 Apr 2025 547th Voltrifrodec 🇸🇰 791 86 23ms 19 Apr 2025 547th lurey99 791 86 26ms 23 Apr 2025 547th Alban-Boissard 791 86 24ms 14 Jun 2025 547th Arkadios200 791 86 26ms 21 Sep 2025 563rd ToE42 782 87 19ms 19 Oct 2022 563rd omri2001 782 87 18ms 19 Oct 2022 563rd Skallos-s 782 87 23ms 5 Dec 2022 563rd damoc1es 782 87 17ms 16 Apr 2023 563rd michelebastione 🇮🇹 782 87 26ms 20 Dec 2023 563rd clampcorder 782 87 16ms 24 Jan 2024 563rd GitQuick 782 87 20ms 23 Feb 2024 563rd EricSchraf 782 87 22ms 21 Mar 2024 563rd salvatore-abello 782 87 22ms 5 Sep 2024 563rd PotatoSaladOverlord 782 87 19ms 21 May 2025 563rd Ibozz91 782 87 24ms 8 Jun 2025 574th Andre3582 773 88 21ms 29 Oct 2022 574th Darknova2468 773 88 21ms 20 Nov 2022 574th Solsticely 773 88 20ms 20 Nov 2022 574th goGuru 773 88 22ms 21 Dec 2022 574th msbranicky 773 88 36ms 9 Aug 2023 574th gussy420 773 88 19ms 28 Oct 2023 574th Shynif 773 88 19ms 21 Feb 2024 574th asterized 773 88 31ms 24 Aug 2024 574th hippopotam00sehead 🇨🇦 773 88 22ms 11 Sep 2024 574th 08jne01 773 88 19ms 21 Nov 2024 574th davidludwik2370 773 88 21ms 14 Sep 2025 585th lovernj 764 89 23ms 23 Aug 2022 585th Roj 764 89 21ms 20 Nov 2022 585th aeonsablaze 764 89 18ms 22 Nov 2022 585th buddyw 764 89 20ms 9 Mar 2023 585th VV1Git 764 89 22ms 28 Mar 2023 585th dranjohn 764 89 22ms 17 Sep 2023 585th ArenaGrenade 764 89 24ms 19 Feb 2024 585th NanduBC 764 89 22ms 6 Sep 2024 585th TheAtrossian 764 89 21ms 5 Jan 2025 585th KimJua41 764 89 19ms 4 May 2025 585th Upload-and-View 🇺🇦 764 89 16ms 20 Aug 2025 596th StoverGitHub 756 90 23ms 16 Jun 2022 596th jamespeilunli 756 90 25ms 4 Jul 2022 596th TrentGlimp 756 90 19ms 3 Sep 2022 596th Ugoran 756 90 26ms 19 Nov 2022 596th PATTRIM 756 90 17ms 5 Jan 2023 First Prev 526–600 of 794 Next Last