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 397th dillon-duncando 590 105 16ms 1 Dec 2021 397th Ch3ngL0rd 590 105 11ms 16 Jan 2024 397th jamesthekee 590 105 11ms 25 Jan 2025 397th kistlerf 🇨🇭 590 105 17ms 16 May 2025 405th dave-ck 585 106 9ms 3 Mar 2018 405th RyanCarrusca 585 106 9ms 21 Feb 2019 405th oriphi 585 106 57ms 17 Jun 2019 405th evanrittner 585 106 16ms 12 Jan 2020 405th oAsAo 585 106 29ms 21 Jan 2020 405th hymanimy 585 106 17ms 11 Aug 2021 405th eshilo-draper 585 106 17ms 18 Nov 2022 405th ZoeMcG 585 106 10ms 8 Jan 2023 405th mathisfun271 585 106 96ms 13 Feb 2024 405th Ythaenagor 585 106 17ms 5 Aug 2024 415th stordev 579 107 17ms 26 Feb 2021 415th KrausRaus 🇺🇸 579 107 10ms 15 Apr 2021 415th petroselo 579 107 16ms 29 Dec 2021 415th jumelet 🇳🇱 579 107 16ms 13 Dec 2022 415th jameswmccarty 579 107 17ms 11 Jul 2024 415th PyryL 🇫🇮 579 107 17ms 15 Mar 2025 415th kbeat 🇰🇿 579 107 17ms 21 May 2025 422nd 05st 574 108 16ms 14 Feb 2022 422nd CameronGBell 574 108 9ms 7 Mar 2022 422nd SniperSmiley 🇺🇸 574 108 16ms 29 Jun 2022 422nd dtaylor0 574 108 16ms 25 Dec 2022 422nd sultan 574 108 11ms 2 Apr 2024 422nd jfallon1997 574 108 17ms 16 May 2024 422nd 40fied4t 574 108 10ms 21 May 2025 429th tkwa 569 109 17ms 5 Dec 2018 429th Bodo171 569 109 14ms 24 Nov 2022 429th DaCuteRaccoon 569 109 10ms 30 Nov 2022 429th jagannathhari 569 109 17ms 21 Oct 2023 429th ian-h-chamberlain 🇺🇸 569 109 17ms 16 Oct 2025 434th ValNyz 564 110 22ms 20 Apr 2018 434th hyvyys 564 110 10ms 16 Sep 2020 434th vodker1 564 110 16ms 8 Mar 2022 434th berdzi 564 110 10ms 15 Mar 2022 434th VictorFordham 564 110 16ms 12 Oct 2023 434th NanduBC 564 110 16ms 7 Sep 2024 440th ArturLange 559 111 10ms 5 Sep 2018 440th adesanjo 559 111 17ms 8 Jun 2019 440th vonKrafft 559 111 10ms 26 Mar 2020 440th TinyTheBrontosaurus 559 111 11ms 4 Dec 2023 440th Artemis21 🇬🇧 559 111 16ms 2 Jan 2025 440th 123mjb 559 111 11ms 26 Jun 2025 446th boxjelly 554 112 10ms 10 Jan 2021 446th Pena86 554 112 10ms 18 Feb 2021 446th Kasci 554 112 74ms 28 Dec 2021 446th Omega65536 🇩🇪 554 112 11ms 29 Nov 2022 446th epic-programmer-guy 554 112 16ms 26 Dec 2023 451st nkansal96 549 113 16ms 21 May 2019 451st TobyBoyne 🇬🇧 549 113 16ms 1 Jun 2019 451st dymowski 549 113 16ms 24 Jul 2019 451st weberax 549 113 9ms 30 Nov 2019 451st AIn0n 549 113 16ms 15 Jul 2021 451st super-tux 549 113 65ms 9 Aug 2021 451st olavaga 549 113 10ms 13 Aug 2021 451st nkoppel 549 113 11ms 20 Oct 2022 451st Skwerl23 549 113 16ms 3 Feb 2023 451st Mikey-Beep 🇬🇧 549 113 10ms 24 Aug 2023 451st Gopalkataria 🇮🇳 549 113 540ms 6 Mar 2025 462nd kenny14231 544 114 10ms 6 Aug 2022 462nd aalec 544 114 109ms 24 Apr 2024 462nd ApoChagi 544 114 18ms 25 Oct 2025 465th michelebastione 🇮🇹 539 115 10ms 19 Nov 2019 465th artieleach 539 115 17ms 12 Dec 2020 465th ktanaka 539 115 10ms 11 Jan 2024 465th clayboll99 539 115 10ms 11 Jul 2025 465th arjunarya1 539 115 10ms 28 Aug 2025 470th sambirnbaum1 534 116 10ms 7 Sep 2019 470th markus-rekdal 534 116 17ms 23 May 2022 470th rowboat1 534 116 10ms 21 Jun 2022 470th AGoyet 534 116 40ms 29 Jun 2022 474th tomh1012 530 117 10ms 30 Oct 2020 474th madeforlosers 530 117 16ms 7 Nov 2025 476th caerbannogwhite 525 118 17ms 13 Apr 2018 476th danwley 525 118 10ms 2 Apr 2019 476th siegelzero 525 118 14ms 24 Jan 2020 476th mothcolada 🇺🇸 525 118 10ms 4 Dec 2020 476th lukehatcher 🇺🇸 525 118 16ms 30 Aug 2021 First Prev 401–480 of 701 Next Last
