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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 595th lhulinsky 756 90 24ms 22 Oct 2024 595th bthalheim 756 90 22ms 6 Dec 2024 595th nooby31415 756 90 19ms 18 Apr 2025 595th SinArieh 756 90 24ms 4 May 2025 595th islptng 756 90 30ms 7 Jul 2025 595th Mr-McChicken 756 90 17ms 20 days ago 607th AbelPelser 747 91 24ms 3 Jul 2022 607th Seis 747 91 20ms 9 Dec 2022 607th r-i-c-e 747 91 19ms 9 Jul 2023 607th joshcors 747 91 17ms 30 Jun 2024 607th resoNathan 747 91 17ms 9 Jul 2024 607th jameswmccarty 747 91 22ms 24 Sep 2024 607th hamilton-bonds 747 91 18ms 12 Nov 2024 607th Wonamm 747 91 30ms 14 Feb 2025 615th TimLeffke 739 92 25ms 17 Aug 2022 615th Rythoka 739 92 16ms 17 Oct 2022 615th UriyaBA 739 92 18ms 19 Mar 2023 615th VladislavGitter 🇪🇸 739 92 19ms 14 Nov 2023 615th ridingqwerty 🇺🇸 739 92 20ms 22 Dec 2023 615th Thonoton 739 92 20ms 1 Feb 2024 615th OCNeve 739 92 24ms 17 Jun 2024 615th themoonisacheese 739 92 28ms 25 Feb 2025 615th BabySharkHi 739 92 27ms 22 Apr 2025 615th arjunarya1 739 92 17ms 28 Aug 2025 615th TJK-S 739 92 20ms 13 days ago 626th Bananapants22 731 93 27ms 4 Sep 2022 626th jaxmattfair 🇺🇸 731 93 20ms 10 Jan 2023 626th cingulataluke 731 93 18ms 27 Aug 2023 626th fenix-bear 731 93 20ms 18 Nov 2023 626th epic-programmer-guy 731 93 26ms 22 Dec 2023 626th brimstonetrader 731 93 24ms 18 Nov 2024 626th Aquateraneal 731 93 18ms 11 Aug 2025 633rd atazzam 🇺🇸 723 94 20ms 18 May 2022 633rd rohangpta 723 94 19ms 8 Aug 2022 633rd shinylego 723 94 25ms 14 Sep 2022 633rd sgaltair 723 94 20ms 4 Nov 2022 633rd TotoAJ 723 94 19ms 15 Dec 2023 633rd Gusic06 723 94 23ms 6 May 2024 633rd kyleyarwood 723 94 28ms 6 Oct 2024 633rd jj0786-cell 723 94 19ms 1 Apr 2025 633rd griffinschreiber 723 94 20ms 1 Apr 2025 642nd felixcroc 716 95 22ms 30 Mar 2023 642nd Pyro569 716 95 23ms 4 Jul 2023 642nd rm-rf-innocence 716 95 20ms 19 Dec 2023 642nd Bit125 716 95 19ms 30 Jan 2024 642nd aalec 716 95 22ms 25 Apr 2024 642nd strogor 716 95 27ms 13 Jun 2025 642nd cthierfelder 🇲🇨 716 95 19ms 17 Jul 2025 649th karhuthebear 708 96 27ms 9 May 2022 649th qwjhvbxi 708 96 24ms 6 Feb 2024 649th alfonsoalves 708 96 19ms 21 Jul 2024 649th jeff-re 708 96 15ms 1 Apr 2025 653rd a-penton 701 97 17ms 22 Sep 2022 653rd jrbud 701 97 22ms 6 Jan 2024 653rd befoster 701 97 23ms 22 Feb 2024 653rd joshua-el-samalouti 🇩🇪 701 97 21ms 26 May 2024 653rd luca1339 701 97 24ms 10 Jun 2024 658th lukemalek 694 98 15ms 10 Oct 2022 658th UltimateGuy0987 694 98 22ms 14 Oct 2022 658th TheLazySquid 694 98 20ms 20 Dec 2022 658th StronkCheese 🇺🇸 694 98 20ms 13 Mar 2023 658th Anthony-Williams-06 694 98 28ms 17 Oct 2023 658th NoneTheFewer 694 98 22ms 17 May 2024 658th abcdhhhh 694 98 15ms 27 Aug 2024 658th OSYCh314 🇦🇺 694 98 25ms 16 Nov 2024 658th cole-wilson 694 98 19ms 9 Dec 2024 658th Akilles1 694 98 21ms 15 May 2025 668th LukeRichardson-dev 687 99 17ms 12 May 2022 668th Tagfox 687 99 19ms 18 Jul 2022 668th gabrielsqw 687 99 25ms 24 Oct 2023 668th sciencedjinn 687 99 18ms 8 Nov 2024 668th MrNiknoc 687 99 20ms 15 Jun 2025 673rd OppositeShark 680 100 18ms 19 Jul 2022 673rd NOS4A5I 680 100 17ms 10 Jan 2023 673rd lomarbrick 680 100 20ms 16 May 2023 First Prev 601–675 of 792 Next Last