The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
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 Multitap Input NFA Simulator Numbrix 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 Multitap Input NFA Simulator Numbrix 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 241st TobyBoyne 🇬🇧 770 74 22ms 4 May 2022 241st RDShah 770 74 18ms 6 May 2022 241st Indivicivet 770 74 19ms 9 May 2022 241st CedricGebistorf 770 74 17ms 9 May 2022 241st ophact 770 74 21ms 11 May 2022 241st ImpressedByRocks 770 74 18ms 17 May 2022 241st LHuitre 770 74 18ms 2 Jun 2022 241st neihousaigaai 770 74 17ms 8 Jun 2022 241st rowboat1 770 74 18ms 10 Jun 2022 241st inverseLorentz 🇦🇺 770 74 18ms 13 Jun 2022 241st clementblaudeau 770 74 22ms 29 Jun 2022 241st adoxography 770 74 19ms 13 Jul 2022 241st Attero 🇸🇪 770 74 19ms 20 Jul 2022 241st Heathcorp 🇦🇺 770 74 18ms 27 Jul 2022 241st jfallon1997 770 74 18ms 11 Aug 2022 241st VictorFordham 770 74 24ms 26 Aug 2022 241st georgehulme 770 74 21ms 1 Sep 2022 241st smartiel 770 74 18ms 15 Sep 2022 241st trist224 🇫🇷 770 74 18ms 21 Sep 2022 241st Kloppermand 🇩🇰 770 74 20ms 7 Oct 2022 241st knutae 🇳🇴 770 74 18ms 9 Oct 2022 241st Troon 770 74 19ms 14 Oct 2022 241st MaxElf999 770 74 20ms 14 Oct 2022 241st SniperSmiley 🇺🇸 770 74 18ms 6 Dec 2022 241st elephantpanda 770 74 23ms 10 Dec 2022 241st ArthurBond 770 74 18ms 19 Dec 2022 241st Larspolo 770 74 18ms 25 Dec 2022 241st dcc5480 770 74 20ms 12 Jan 2023 241st Ripick 770 74 19ms 1 Feb 2023 241st m3nt0ras 🇬🇷 770 74 18ms 3 Feb 2023 241st Skwerl23 770 74 20ms 5 Feb 2023 241st frankgraziano 770 74 18ms 19 Feb 2023 241st KenanHanke 770 74 19ms 21 Feb 2023 241st DanielPeterssonAI 770 74 19ms 13 Mar 2023 241st jiaminglimjm 🇲🇾 770 74 18ms 20 Mar 2023 241st ejini6969 770 74 19ms 22 Mar 2023 241st GulgDev 770 74 18ms 22 Mar 2023 241st vrnprkh 770 74 19ms 30 Mar 2023 241st RuyiLi 770 74 18ms 1 Apr 2023 241st StardustGogeta 770 74 18ms 7 May 2023 241st zbreit 🇺🇸 770 74 19ms 7 May 2023 241st kyleclaassen 770 74 19ms 20 May 2023 241st mbittner20 770 74 19ms 27 May 2023 241st tweska 🇳🇱 770 74 18ms 5 Jun 2023 241st cros107 🇦🇺 770 74 18ms 11 Aug 2023 241st yourlefthandman 770 74 18ms 16 Aug 2023 241st daisyyedda 770 74 21ms 17 Aug 2023 241st cesarm4 770 74 18ms 29 Aug 2023 241st midnattssol 🇸🇪 770 74 18ms 22 Sep 2023 241st lambda-abstraction 770 74 20ms 21 Oct 2023 241st levavft 770 74 18ms 26 Oct 2023 241st Buecherfresser 770 74 19ms 22 Nov 2023 241st anarconic 770 74 51ms 8 Dec 2023 241st azure-blondon 770 74 18ms 11 Dec 2023 241st kurkale6ka 770 74 20ms 20 Dec 2023 241st Anonymousellama21 770 74 20ms 14 Mar 2024 241st Bmrl7 770 74 21ms 23 Mar 2024 241st cefqrn 770 74 19ms 26 May 2024 241st drochom 770 74 18ms 18 Jun 2024 241st hiichbindermax 770 74 18ms 22 Jun 2024 241st madex 🇩🇪 770 74 18ms 9 Jul 2024 241st cykim8811 770 74 46ms 11 Jul 2024 241st imelxr 🇮🇱 770 74 30ms 17 Aug 2024 241st EnTerr 770 74 21ms 25 Aug 2024 241st Mabeloid 🇳🇴 770 74 18ms 1 Sep 2024 241st madeforlosers 770 74 19ms 5 Sep 2024 241st LostSyntax21 🇬🇧 770 74 20ms 10 Sep 2024 241st Deedogg 770 74 19ms 11 Sep 2024 241st MassimoParisi 770 74 18ms 18 Sep 2024 241st agreegious 770 74 20ms 17 Nov 2024 241st Stockoh 🇫🇷 770 74 24ms 17 Nov 2024 241st Andrey135296 770 74 20ms 24 Nov 2024 241st TralfamadorianComedian 770 74 18ms 6 Dec 2024 241st bltnppcnt 770 74 32ms 3 Jan 2025 241st ZorblaxV 770 74 18ms 12 Jan 2025 241st yokasuretsu 770 74 19ms 13 Jan 2025 241st gdpr777 770 74 31ms 10 Feb 2025 241st Pyroan 770 74 21ms 27 Mar 2025 241st Squimbletin 770 74 22ms 19 Apr 2025 241st Dandandooo 770 74 21ms 23 Apr 2025 First Prev 241–320 of 812 Next Last
