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 240th ovs-code 🇩🇪 908 77 4ms 4 Nov 2023 242nd JayXon 🇺🇸 908 91 465ms 6 Mar 2022 243rd clockworknazo 907 83 13ms 13 Oct 2022 243rd ovs-code 🇩🇪 907 83 13ms 7 Feb 2023 243rd Lydxn 🇨🇦 907 83 14ms 28 Feb 2023 243rd GrayJoKing 🇦🇺 907 83 17ms 2 Mar 2023 247th Lydxn 🇨🇦 907 88 102ms 9 Apr 2023 247th JayXon 🇺🇸 907 88 100ms 9 Apr 2023 247th Steffan153 🇫🇮 907 88 104ms 9 Apr 2023 247th sean-niemann 🇺🇸 907 88 100ms 25 May 2025 251st JayXon 🇺🇸 906 74 436ms 25 Jan 2024 251st kg583 🇺🇸 906 74 472ms 15 Oct 2025 253rd JayXon 🇺🇸 906 78 2,851ms 5 Dec 2024 254th btnlq 906 84 19ms 9 Dec 2021 254th GrayJoKing 🇦🇺 906 84 35ms 9 Dec 2021 256th rucin93 🇵🇱 905 64 126ms 6 Sep 2024 257th DialFrost 🇸🇬 905 68 159ms 2 Jul 2025 258th anter69 🇭🇺 904 55 1,053ms 10 Mar 2025 259th edsrzf 🇳🇿 904 68 1,070ms 12 Sep 2025 259th sean-niemann 🇺🇸 904 68 758ms 15 Sep 2025 259th DialFrost 🇸🇬 904 68 780ms 12 Nov 2025 262nd Lydxn 🇨🇦 904 88 3,175ms 22 Mar 2023 263rd DialFrost 🇸🇬 904 104 444ms 16 Nov 2025 264th primo-ppcg 🇹🇭 903 85 39ms 22 Sep 2021 264th cure-honey 🇯🇵 903 85 39ms 27 Sep 2021 264th marshallward 🇺🇸 903 85 41ms 2 Sep 2022 267th Lydxn 🇨🇦 903 90 384ms 14 Aug 2022 268th GrayJoKing 🇦🇺 903 97 40ms 23 Oct 2023 269th nwellnhof 🇩🇪 902 53 74ms 26 Dec 2021 270th bastatom 902 132 260ms 27 Feb 2024 270th emgordon154 902 132 261ms 17 Jan 2025 272nd kg583 🇺🇸 901 93 17ms 28 Oct 2025 273rd JayXon 🇺🇸 901 95 119ms 27 Sep 2021 273rd Lydxn 🇨🇦 901 95 122ms 16 May 2023 275th primo-ppcg 🇹🇭 901 110 439ms 22 Sep 2021 276th MeWhenI 🇻🇦 900 66 11ms 19 Sep 2021 276th sisyphus-ppcg 🇦🇺 900 66 10ms 20 Sep 2021 276th Irratix 🇳🇱 900 66 10ms 15 Dec 2021 276th DialFrost 🇸🇬 900 66 10ms 28 Jan 2023 276th Argeento 🇵🇱 900 66 10ms 26 Aug 2023 281st dvargas46 🇺🇸 899 56 304ms 15 Nov 2022 282nd Lydxn 🇨🇦 899 89 142ms 4 Sep 2023 283rd GrayJoKing 🇦🇺 899 90 541ms 10 Sep 2022 284th Lydxn 🇨🇦 899 92 485ms 9 Apr 2023 284th sean-niemann 🇺🇸 899 92 428ms 16 May 2024 284th Steffan153 🇫🇮 899 92 446ms 21 Jul 2024 287th GolfingSuccess 🇬🇷 898 81 5ms 19 Mar 2025 287th sean-niemann 🇺🇸 898 81 2ms 19 Nov 2025 289th lifthrasiir 🇰🇷 897 29 5ms 29 Nov 2024 290th prplz 🇦🇺 897 76 165ms 27 Sep 2021 290th YAJUE114514 897 76 153ms 30 Jul 2025 292nd ahmetdemirag 🇨🇾 897 78 159ms 11 Feb 2025 293rd Lydxn 🇨🇦 897 80 10ms 20 May 2023 293rd GrayJoKing 🇦🇺 897 80 12ms 13 Aug 2023 293rd btnlq 897 80 12ms 22 Oct 2023 296th typeswitch-dev 🇵🇹 897 94 4ms 2 Aug 2023 297th DialFrost 🇸🇬 896 78 8ms 17 Dec 2024 298th KasperKivimaeki 🇫🇮 896 105 324ms 14 days ago 299th 2bular 894 34 32ms 6 Nov 2025 300th m-tkach 🇺🇦 894 75 437ms 20 Jan 2024 300th emgordon154 894 75 465ms 16 Apr 2025 302nd JayXon 🇺🇸 894 89 2,809ms 19 Jul 2025 303rd KasperKivimaeki 🇫🇮 894 106 59ms 14 days ago 304th GrayJoKing 🇦🇺 893 84 27ms 31 Jan 2025 305th JayXon 🇺🇸 893 91 125ms 4 Nov 2021 305th primo-ppcg 🇹🇭 893 91 127ms 2 Apr 2022 305th Ripick 893 91 130ms 1 Feb 2023 308th AlephSquirrel 893 111 438ms 17 Feb 2024 309th SirBogman 🇺🇸 892 86 39ms 2 Nov 2022 310th Lydxn 🇨🇦 891 69 94ms 13 Dec 2022 310th sisyphus-ppcg 🇦🇺 891 69 96ms 16 Dec 2022 312th GrayJoKing 🇦🇺 891 110 27ms 13 Jan 2023 313th primo-ppcg 🇹🇭 890 42 285ms 20 Sep 2021 313th sisyphus-ppcg 🇦🇺 890 42 251ms 31 Jan 2023 313th Lydxn 🇨🇦 890 42 213ms 3 Mar 2023 316th nwellnhof 🇩🇪 890 56 1,069ms 2 Mar 2023 317th lynn 890 96 1,269ms 6 Oct 2021 317th kg583 🇺🇸 890 96 42ms 26 Jul 2025 317th edsrzf 🇳🇿 890 96 46ms 2 days ago 320th JayXon 🇺🇸 889 90 86ms 5 Sep 2023 First Prev 241–320 of 2,045 Next Last