The Calendar hole will go live in approximately 5 days. Why not try and solve it ahead of time?
Happy Numbers (Long) in all languages 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 321st Steffan153 🇫🇮 889 91 1,519ms 19 Aug 2024 322nd MeWhenI 🇻🇦 888 56 982ms 13 Nov 2022 323rd Shanethegamer 🇺🇸 888 65 70ms 1 Dec 2024 324th Steffan153 🇫🇮 888 74 58ms 10 Nov 2023 324th sean-niemann 🇺🇸 888 74 70ms 9 Apr 2025 324th edsrzf 🇳🇿 888 74 60ms 5 Jul 2025 324th targrik 888 74 67ms 10 days ago 328th hrubymar10 888 134 272ms 27 Feb 2024 329th Steffan153 🇫🇮 887 82 2ms 29 Oct 2023 329th GrayJoKing 🇦🇺 887 82 4ms 19 Nov 2025 329th ovs-code 🇩🇪 887 82 2ms 19 Nov 2025 329th edsrzf 🇳🇿 887 82 3ms 2 days ago 333rd xsot 🇸🇬 886 54 38ms 25 Jul 2023 334th inventshah 886 67 10ms 26 Sep 2023 334th ovs-code 🇩🇪 886 67 13ms 29 Jul 2024 336th hallvabo 🇳🇴 886 79 21ms 21 Sep 2021 336th annaproxy 886 79 173ms 23 Nov 2021 336th anter69 🇭🇺 886 79 301ms 3 Apr 2022 336th Irratix 🇳🇱 886 79 302ms 28 Apr 2022 336th OllieBoyne 🇬🇧 886 79 185ms 25 May 2022 336th MeWhenI 🇻🇦 886 79 173ms 17 Aug 2023 336th ndren 886 79 204ms 11 Feb 2024 336th 5cw 🇺🇸 886 79 312ms 8 May 2024 336th bzijlema 🇳🇱 886 79 321ms 11 Oct 2024 336th jipsong 🇩🇪 886 79 293ms 20 Jun 2025 336th InigoK 🇺🇸 886 79 182ms 5 Sep 2025 336th fuzzylojik-golf 🇺🇸 886 79 178ms 15 Sep 2025 348th Steffan153 🇫🇮 886 81 12ms 18 Apr 2023 348th kg583 🇺🇸 886 81 12ms 15 Oct 2025 350th MeWhenI 🇻🇦 885 79 2ms 21 Jun 2022 351st primo-ppcg 🇹🇭 885 99 42ms 19 Jul 2022 352nd m-tkach 🇺🇦 885 143 25ms 7 Apr 2022 352nd primo-ppcg 🇹🇭 885 143 25ms 25 Jun 2022 354th canissimia 🇦🇶 885 218 30ms 25 Oct 2021 355th inventshah 884 61 3ms 26 Sep 2023 356th GrayJoKing 🇦🇺 884 90 3,433ms 16 Jun 2022 357th m-tkach 🇺🇦 884 127 24ms 15 Jan 2025 358th Shanethegamer 🇺🇸 883 97 89ms 17 Dec 2021 358th MeWhenI 🇻🇦 883 97 141ms 21 Jun 2022 358th stefangimmillaro 883 97 91ms 18 Oct 2022 358th sean-niemann 🇺🇸 883 97 89ms 7 Feb 2023 358th Steffan153 🇫🇮 883 97 88ms 9 Apr 2023 358th Yewzir 🇧🇪 883 97 89ms 14 Jan 2024 364th GolfingSuccess 🇬🇷 882 76 427ms 15 Jan 2024 364th GrayJoKing 🇦🇺 882 76 557ms 15 Jan 2024 364th Steffan153 🇫🇮 882 76 433ms 16 Jan 2024 364th AlephSquirrel 882 76 488ms 16 Jan 2024 368th MeWhenI 🇻🇦 882 102 58ms 7 Dec 2022 369th Steffan153 🇫🇮 880 97 1,261ms 4 Jan 2023 370th snoozingnewt 🇨🇦 879 70 736ms 16 Oct 2025 371st MeWhenI 🇻🇦 879 91 119ms 5 Sep 2023 372nd Bubbler-4 878 96 4ms 14 Jul 2023 372nd Lydxn 🇨🇦 878 96 4ms 15 Jul 2023 372nd GrayJoKing 🇦🇺 878 96 4ms 15 Jul 2023 372nd btnlq 878 96 3ms 15 Jul 2023 372nd ovs-code 🇩🇪 878 96 5ms 15 Jul 2023 372nd MeWhenI 🇻🇦 878 96 4ms 25 Jul 2023 378th canissimia 🇦🇶 878 144 2,821ms 24 Feb 2023 379th Steffan153 🇫🇮 877 113 441ms 17 Feb 2024 380th DialFrost 🇸🇬 876 75 2,071ms 26 Dec 2024 381st Lydxn 🇨🇦 876 100 41ms 19 Jul 2022 382nd btnlq 875 57 953ms 27 Dec 2021 382nd SirBogman 🇺🇸 875 57 978ms 8 Jan 2024 384th MeWhenI 🇻🇦 875 88 356ms 16 Aug 2023 384th stefangimmillaro 875 88 360ms 18 Sep 2023 384th namelessiw 875 88 424ms 9 Jun 2024 387th GolfingSuccess 🇬🇷 875 112 106ms 28 Nov 2025 387th edsrzf 🇳🇿 875 112 105ms 2 days ago 389th o0lit3 🇺🇸 874 50 69ms 19 Sep 2021 389th primo-ppcg 🇹🇭 874 50 127ms 20 Sep 2021 389th nwellnhof 🇩🇪 874 50 59ms 26 Dec 2021 389th Lydxn 🇨🇦 874 50 144ms 25 May 2022 389th saito-ta 🇯🇵 874 50 147ms 27 May 2022 394th Bubbler-4 874 66 69ms 13 Sep 2023 395th fuzzylojik-golf 🇺🇸 874 78 154ms 15 Sep 2025 396th primo-ppcg 🇹🇭 874 80 267ms 22 Sep 2021 396th prplz 🇦🇺 874 80 213ms 18 Dec 2021 396th inventshah 874 80 303ms 10 May 2022 396th KatieLG 🇬🇧 874 80 311ms 5 Nov 2022 396th jhu04 874 80 302ms 18 Jan 2024 First Prev 321–400 of 2,046 Next Last