Collatz in Python in chars. 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 Chars Time Submitted 518th LHLaurini 🇧🇷 687 83 25ms 26 Jun 2024 518th C0derX3 🇺🇸 687 83 21ms 18 Sep 2024 518th ComputerKWasTaken 🇺🇸 687 83 27ms 20 Jan 2025 518th Vexxter9 🇳🇱 687 83 71ms 4 Feb 2025 518th CodyKlingler 687 83 24ms 7 Feb 2025 518th OyuDays 687 83 19ms 17 Mar 2025 518th julianreece 687 83 22ms 29 Apr 2025 518th jacekwladzinski 687 83 36ms 20 days ago 534th Feniske 🇫🇷 679 84 23ms 7 Oct 2022 534th Eilonlif 🇮🇱 679 84 30ms 29 Mar 2023 534th mhsaul 679 84 17ms 11 Apr 2023 534th Phyisis 679 84 20ms 30 Apr 2024 534th MaxCastella 🇫🇷 679 84 23ms 11 Oct 2024 534th SURAJMITTAL 679 84 27ms 17 Dec 2024 534th simplylu 679 84 20ms 5 Jan 2025 534th WillowWispy 679 84 20ms 14 Mar 2025 534th rustykitty 679 84 21ms 2 May 2025 534th VedJosh 679 84 25ms 3 May 2025 534th hetz2625 679 84 22ms 4 May 2025 545th aazuspan 671 85 20ms 15 Jun 2022 545th myleopard 671 85 22ms 20 Jul 2022 545th LukasFolwarczny 🇨🇿 671 85 30ms 16 Sep 2022 545th aaardwark 671 85 23ms 1 Jun 2025 545th kmathis22 671 85 20ms 10 Sep 2025 550th MichaelMBradley 🇨🇦 663 86 24ms 5 Jun 2022 550th Lemonz-13223 663 86 27ms 21 Sep 2022 550th Bodo171 663 86 24ms 24 Nov 2022 550th shibacho 🇯🇵 663 86 19ms 25 Nov 2022 550th Vaekor 663 86 21ms 9 Jul 2023 550th LeoVanderSteege 663 86 17ms 18 Nov 2023 550th Pale-Vessel 663 86 20ms 18 Dec 2023 550th tik25 663 86 25ms 28 Mar 2024 550th willschremmer 663 86 18ms 27 Apr 2024 550th jamiloBBKing 663 86 24ms 27 Jan 2025 550th AsishKunta 663 86 19ms 1 Apr 2025 550th Hemanthred2005 663 86 18ms 1 Apr 2025 550th Voltrifrodec 🇸🇰 663 86 23ms 19 Apr 2025 550th lurey99 663 86 26ms 23 Apr 2025 550th Alban-Boissard 663 86 24ms 14 Jun 2025 550th Arkadios200 663 86 26ms 21 Sep 2025 566th ToE42 655 87 19ms 19 Oct 2022 566th omri2001 655 87 18ms 19 Oct 2022 566th Skallos-s 655 87 23ms 5 Dec 2022 566th damoc1es 655 87 17ms 16 Apr 2023 566th michelebastione 🇮🇹 655 87 26ms 20 Dec 2023 566th clampcorder 655 87 16ms 24 Jan 2024 566th GitQuick 655 87 20ms 23 Feb 2024 566th EricSchraf 655 87 22ms 21 Mar 2024 566th PotatoSaladOverlord 655 87 19ms 21 May 2025 566th Ibozz91 655 87 24ms 8 Jun 2025 576th Andre3582 648 88 21ms 29 Oct 2022 576th Darknova2468 648 88 21ms 20 Nov 2022 576th Solsticely 648 88 20ms 20 Nov 2022 576th goGuru 648 88 22ms 21 Dec 2022 576th msbranicky 648 88 36ms 9 Aug 2023 576th gussy420 648 88 19ms 28 Oct 2023 576th Shynif 648 88 19ms 21 Feb 2024 576th asterized 648 88 31ms 24 Aug 2024 576th hippopotam00sehead 🇨🇦 648 88 22ms 11 Sep 2024 576th 08jne01 648 88 19ms 21 Nov 2024 576th davidludwik2370 648 88 21ms 14 Sep 2025 587th lovernj 640 89 23ms 23 Aug 2022 587th Roj 640 89 21ms 20 Nov 2022 587th aeonsablaze 640 89 18ms 22 Nov 2022 587th buddyw 640 89 20ms 9 Mar 2023 587th VV1Git 640 89 22ms 28 Mar 2023 587th dranjohn 640 89 22ms 17 Sep 2023 587th ArenaGrenade 640 89 24ms 19 Feb 2024 587th NanduBC 640 89 22ms 6 Sep 2024 587th TheAtrossian 640 89 21ms 5 Jan 2025 587th KimJua41 640 89 19ms 4 May 2025 587th Upload-and-View 🇺🇦 640 89 16ms 20 Aug 2025 598th StoverGitHub 633 90 23ms 16 Jun 2022 598th jamespeilunli 633 90 25ms 4 Jul 2022 598th TrentGlimp 633 90 19ms 3 Sep 2022 First Prev 526–600 of 791 Next Last