The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Happy Numbers in Python in bytes. 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 Bytes Time Submitted 559th andrewgopher 477 130 10ms 27 Jun 2022 559th LukasFolwarczny 🇨🇿 477 130 17ms 16 Sep 2022 559th ThatAlo 477 130 10ms 27 Jan 2023 559th Coding4Hours 477 130 17ms 4 Oct 2024 559th IsaacAlexBarden 477 130 10ms 13 Feb 2025 566th ozewski 473 131 69ms 2 May 2019 566th guliyevemil1 🇦🇿 473 131 10ms 18 Apr 2020 566th Gordo5556 473 131 10ms 29 Apr 2022 569th theonlytruemathnerd 470 132 17ms 11 Jan 2020 569th JuanGomez12 470 132 10ms 2 Feb 2023 569th aszku 470 132 9ms 20 Apr 2023 569th strogor 470 132 10ms 9 Jun 2025 573rd Manby 466 133 11ms 30 Jun 2021 573rd byteDJINN 466 133 17ms 16 Jan 2024 575th patbassing 463 134 10ms 26 May 2019 575th Nibamot 463 134 9ms 19 Feb 2020 575th aagray33 463 134 10ms 28 Feb 2020 575th Techdude01 463 134 17ms 17 Dec 2022 575th julian-hoelz 463 134 10ms 15 Sep 2024 580th bkshrader 459 135 17ms 27 Dec 2018 580th reubengann 459 135 10ms 14 Feb 2020 580th FusionAtom360 459 135 10ms 28 Sep 2024 580th DGipe 459 135 10ms 22 Oct 2025 584th smartiel 456 136 10ms 15 Sep 2022 584th ComputerKWasTaken 🇺🇸 456 136 17ms 8 Jun 2024 586th DrPrettyman 453 137 11ms 1 Jun 2023 587th adamhass 449 138 10ms 19 Jul 2018 587th zwxzwxzwx21 449 138 10ms 5 Nov 2023 587th mrmena 🇦🇺 449 138 17ms 16 Apr 2024 590th jmhowl 446 139 17ms 19 Jan 2020 590th mokymok 🇺🇸 446 139 17ms 29 Dec 2021 590th lightediand 🇬🇧 446 139 10ms 18 Jan 2023 590th CyberTapir 446 139 11ms 1 Sep 2024 590th Wonamm 446 139 11ms 14 Feb 2025 590th TJK-S 446 139 10ms 22 Oct 2025 596th mcdowell95 443 140 10ms 26 Mar 2020 596th osmith93 443 140 10ms 31 Jul 2021 596th 104210 443 140 10ms 11 May 2022 599th Pierrot-Baptiste 440 141 10ms 9 Aug 2020 599th dranjohn 440 141 10ms 10 Sep 2023 599th SURAJMITTAL 440 141 10ms 20 Dec 2024 602nd ChristophJud 437 142 9ms 11 Aug 2020 602nd ESOrSomething 437 142 11ms 29 Sep 2025 604th RoscoeSmith 434 143 12ms 14 Sep 2022 605th SimonPeatman 431 144 16ms 2 Feb 2019 605th pde-bakk 🇳🇱 431 144 11ms 23 Oct 2023 607th CRHillman 428 145 17ms 17 Aug 2018 607th ethandhunt 428 145 10ms 29 Jul 2021 609th KiwiKoder0123 425 146 11ms 24 Jun 2019 609th KatieLG-Transpiler 🇬🇧 425 146 10ms 23 Jun 2022 609th twocatsinatrenchcoat 425 146 10ms 18 Nov 2022 609th fraserli 🇦🇺 425 146 16ms 17 Feb 2023 609th zt14427 425 146 9ms 4 Mar 2023 609th Schmitt-Very-Cool 425 146 11ms 3 Apr 2024 615th potato-jackson 422 147 16ms 10 Sep 2021 615th Florian-Mt 422 147 17ms 26 Sep 2023 617th Mojken 419 148 16ms 2 Sep 2018 618th snickercop 416 149 10ms 6 Aug 2019 618th cingulataluke 416 149 10ms 28 Aug 2023 620th ionutm82 413 150 11ms 22 Feb 2019 621st dahrens 411 151 10ms 7 Jul 2019 622nd fepe55 408 152 9ms 21 Sep 2018 623rd ari-gutierrez 400 155 33ms 22 Oct 2018 624th Spi3lot 395 157 9ms 18 Sep 2021 624th MarioPlq 395 157 10ms 24 Jun 2022 624th OppositeShark 395 157 10ms 19 Jul 2022 627th ridingqwerty 🇺🇸 392 158 11ms 6 Dec 2023 627th j3mak 392 158 13ms 16 Jan 2024 629th qewdweftr4g 390 159 11ms 16 Oct 2024 629th NoneTheFewer 390 159 15ms 14 days ago 631st rajlath 388 160 11ms 9 Apr 2018 632nd peculiarination 383 162 16ms 11 May 2021 632nd Ugoran 383 162 10ms 1 Dec 2022 634th Ty-Cyr 380 163 9ms 13 Jul 2023 635th tbadun 378 164 18ms 8 Oct 2022 635th Natz12 378 164 10ms 27 Jan 2023 637th Pimveha 376 165 11ms 11 Jan 2023 638th EB-Brown 373 166 11ms 23 Aug 2019 639th tombs4 369 168 12ms 8 Jun 2020 640th YoungjuneKwon 365 170 10ms 6 Dec 2018 First Prev 561–640 of 701 Next Last
