The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Happy Numbers 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 560th shibacho 🇯🇵 375 128 17ms 25 Nov 2022 560th EthanJantz 375 128 17ms 27 Aug 2025 563rd ChristianFieldhouse 372 129 9ms 22 Mar 2021 564th richard-oelze 🇩🇪 369 130 16ms 28 Feb 2021 564th yokasuretsu 369 130 10ms 28 Nov 2021 564th andrewgopher 369 130 10ms 27 Jun 2022 564th LukasFolwarczny 🇨🇿 369 130 17ms 16 Sep 2022 564th ThatAlo 369 130 10ms 27 Jan 2023 564th Coding4Hours 369 130 17ms 4 Oct 2024 564th IsaacAlexBarden 369 130 10ms 13 Feb 2025 571st ozewski 366 131 69ms 2 May 2019 571st guliyevemil1 🇦🇿 366 131 10ms 18 Apr 2020 571st Gordo5556 366 131 10ms 29 Apr 2022 574th theonlytruemathnerd 364 132 17ms 11 Jan 2020 574th JuanGomez12 364 132 10ms 2 Feb 2023 574th aszku 364 132 9ms 20 Apr 2023 574th strogor 364 132 10ms 9 Jun 2025 578th Manby 361 133 11ms 30 Jun 2021 578th byteDJINN 361 133 17ms 16 Jan 2024 580th skps2010 358 134 9ms 4 Jan 2019 580th patbassing 358 134 10ms 26 May 2019 580th Nibamot 358 134 9ms 19 Feb 2020 580th aagray33 358 134 10ms 28 Feb 2020 580th Techdude01 358 134 17ms 17 Dec 2022 580th julian-hoelz 358 134 10ms 15 Sep 2024 586th bkshrader 356 135 17ms 27 Dec 2018 586th reubengann 356 135 10ms 14 Feb 2020 586th FusionAtom360 356 135 10ms 28 Sep 2024 586th DGipe 356 135 10ms 22 Oct 2025 590th smartiel 353 136 10ms 15 Sep 2022 590th ComputerKWasTaken 🇺🇸 353 136 17ms 8 Jun 2024 592nd DrPrettyman 350 137 11ms 1 Jun 2023 593rd adamhass 348 138 10ms 19 Jul 2018 593rd mrmena 🇦🇺 348 138 17ms 16 Apr 2024 595th jmhowl 345 139 17ms 19 Jan 2020 595th mokymok 🇺🇸 345 139 17ms 29 Dec 2021 595th lightediand 🇬🇧 345 139 10ms 18 Jan 2023 595th CyberTapir 345 139 11ms 1 Sep 2024 595th Wonamm 345 139 11ms 14 Feb 2025 595th TJK-S 345 139 10ms 22 Oct 2025 601st mcdowell95 343 140 10ms 26 Mar 2020 601st osmith93 343 140 10ms 31 Jul 2021 601st 104210 343 140 10ms 11 May 2022 604th Pierrot-Baptiste 340 141 10ms 9 Aug 2020 604th dranjohn 340 141 10ms 10 Sep 2023 604th SURAJMITTAL 340 141 10ms 20 Dec 2024 607th ChristophJud 338 142 9ms 11 Aug 2020 607th ESOrSomething 338 142 11ms 29 Sep 2025 609th RoscoeSmith 336 143 12ms 14 Sep 2022 610th SimonPeatman 333 144 16ms 2 Feb 2019 610th pde-bakk 🇳🇱 333 144 11ms 23 Oct 2023 612th CRHillman 331 145 17ms 17 Aug 2018 612th ethandhunt 331 145 10ms 29 Jul 2021 614th KiwiKoder0123 329 146 11ms 24 Jun 2019 614th KatieLG-Transpiler 🇬🇧 329 146 10ms 23 Jun 2022 614th twocatsinatrenchcoat 329 146 10ms 18 Nov 2022 614th fraserli 🇦🇺 329 146 16ms 17 Feb 2023 614th zt14427 329 146 9ms 4 Mar 2023 614th Schmitt-Very-Cool 329 146 11ms 3 Apr 2024 620th potato-jackson 327 147 16ms 10 Sep 2021 620th Florian-Mt 327 147 17ms 26 Sep 2023 622nd Mojken 324 148 16ms 2 Sep 2018 623rd snickercop 322 149 10ms 6 Aug 2019 624th ionutm82 320 150 11ms 22 Feb 2019 625th dahrens 318 151 10ms 7 Jul 2019 626th fepe55 316 152 9ms 21 Sep 2018 627th ari-gutierrez 310 155 33ms 22 Oct 2018 628th Spi3lot 306 157 9ms 18 Sep 2021 628th OppositeShark 306 157 10ms 19 Jul 2022 630th j3mak 304 158 13ms 16 Jan 2024 631st qewdweftr4g 302 159 11ms 16 Oct 2024 631st NoneTheFewer 302 159 15ms 14 days ago 633rd rajlath 300 160 11ms 9 Apr 2018 634th peculiarination 296 162 16ms 11 May 2021 634th Ugoran 296 162 10ms 1 Dec 2022 636th Ty-Cyr 294 163 9ms 13 Jul 2023 637th tbadun 293 164 18ms 8 Oct 2022 637th Natz12 293 164 10ms 27 Jan 2023 639th Pimveha 291 165 11ms 11 Jan 2023 640th EB-Brown 289 166 11ms 23 Aug 2019 First Prev 561–640 of 701 Next Last
