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 476th P-Quentin 🇫🇷 525 118 28ms 10 Aug 2022 476th midnattssol 🇸🇪 525 118 11ms 27 Jul 2023 476th JesseNoEyes 🇺🇸 525 118 10ms 25 Sep 2024 484th dddthedark 521 119 9ms 11 Jan 2018 484th raywinray 521 119 11ms 27 Sep 2018 484th alangodfrey 521 119 10ms 11 Jun 2019 484th ElevatorShaft 521 119 9ms 18 Jun 2019 484th iso4096 521 119 9ms 8 Mar 2020 484th Andre3582 521 119 9ms 25 Oct 2020 484th enbyte 521 119 9ms 27 May 2021 484th Hannah-Varekamp 521 119 10ms 17 Jun 2021 484th StarmaQ 521 119 9ms 12 Jan 2022 484th Trunksistor 🇫🇷 521 119 17ms 19 Apr 2022 484th Puperger 521 119 9ms 19 Jun 2022 484th jhpaques 🇫🇷 521 119 9ms 29 Jul 2022 484th kevdah 521 119 10ms 2 Aug 2022 484th bwenstar 521 119 11ms 9 Aug 2022 484th mdnestor 521 119 10ms 28 Dec 2022 484th mbittner20 521 119 11ms 27 May 2023 484th HumanoidCPU 521 119 9ms 3 May 2024 484th therealnumbers 521 119 10ms 4 Jun 2024 484th RedzGoose 🇦🇺 521 119 9ms 25 Oct 2024 484th mishak-sys 521 119 9ms 31 Mar 2025 484th damoose717 521 119 13ms 23 May 2025 484th WillowWispy 521 119 17ms 25 May 2025 484th SectorCorruptor 521 119 10ms 25 Jul 2025 507th jaredcrystal 🇺🇸 517 120 16ms 17 Mar 2018 507th BenBanerjeeRichards 517 120 10ms 20 Jan 2022 509th johnnythedoggie 512 121 24ms 26 Apr 2021 509th bac0id 512 121 9ms 27 Sep 2023 509th brimstonetrader 512 121 9ms 22 Jan 2024 512th babulibaba 508 122 9ms 30 Aug 2019 512th AreYouW 508 122 9ms 6 Dec 2019 512th Hawkeye99 508 122 9ms 6 Dec 2019 512th ADV1K 🇮🇳 508 122 9ms 18 Feb 2020 512th garrisonhh 508 122 17ms 21 Nov 2020 512th Command-Crafter 508 122 9ms 8 Nov 2021 512th lovernj 508 122 9ms 7 Feb 2022 512th Demonarchet 508 122 9ms 2 May 2023 512th Deedogg 508 122 17ms 5 Sep 2024 512th 0dyse 508 122 10ms 29 Apr 2025 512th osNiko 🇧🇷 508 122 10ms 23 Jul 2025 523rd lukasmoellerch 504 123 10ms 14 Jan 2019 523rd Kreavita 504 123 10ms 14 Jan 2019 523rd timkaiser 504 123 10ms 19 Apr 2019 523rd bobbysq 504 123 11ms 29 Jun 2023 527th KarachunIvan 500 124 10ms 19 Feb 2018 527th sleepyStick 500 124 16ms 11 Mar 2022 529th lmeuser 496 125 10ms 2 Dec 2017 529th 0xCake 496 125 17ms 20 Apr 2020 529th haydenridd 496 125 10ms 20 Oct 2020 529th markbyrne 496 125 10ms 20 Oct 2020 529th samchristiandd 496 125 11ms 19 Feb 2021 529th clementblaudeau 496 125 9ms 26 May 2021 529th brochmann 🇸🇪 496 125 9ms 6 Feb 2022 529th AliceFord 496 125 9ms 2 Jun 2022 529th elephantpanda 496 125 9ms 31 Aug 2022 529th Azearia 496 125 9ms 1 Dec 2022 529th Schreipfelerer 496 125 9ms 9 Apr 2023 529th eddvrs 496 125 10ms 21 Dec 2023 529th qwjhvbxi 496 125 11ms 8 Feb 2024 529th Pale-Vessel 496 125 9ms 1 Apr 2024 529th hippopotam00sehead 🇨🇦 496 125 9ms 13 Sep 2024 529th TralfamadorianComedian 496 125 9ms 31 Dec 2024 529th TheZwierzLF 🇵🇱 496 125 30ms 25 May 2025 546th jackedwards04 492 126 9ms 22 Nov 2020 546th b4dpxl 492 126 16ms 10 Nov 2021 546th jettdc 492 126 9ms 31 Dec 2022 546th jstechman 492 126 10ms 9 Mar 2024 550th usnheckler 488 127 64ms 7 Jun 2019 550th derekthatcher 488 127 16ms 25 Sep 2020 550th bastienvoirin 🇫🇷 488 127 16ms 28 Nov 2020 550th Evan-Robotics 488 127 16ms 26 Jan 2022 550th gareth-kmet 488 127 16ms 2 Mar 2023 555th petar-donchev 484 128 10ms 8 Sep 2019 555th shibacho 🇯🇵 484 128 17ms 25 Nov 2022 555th EthanJantz 484 128 17ms 27 Aug 2025 558th ChristianFieldhouse 481 129 9ms 22 Mar 2021 559th richard-oelze 🇩🇪 477 130 16ms 28 Feb 2021 559th yokasuretsu 477 130 10ms 28 Nov 2021 First Prev 481–560 of 701 Next Last
