The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Happy Numbers 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 481st MeWhenI 🇻🇦 911 62 118ms 11 Nov 2021 482nd sisyphus-ppcg 🇦🇺 911 77 2ms 3 Feb 2023 483rd Shanethegamer 🇺🇸 910 63 65ms 18 May 2022 483rd Yewzir 🇧🇪 910 63 66ms 9 Nov 2023 483rd Betuaredead 910 63 68ms 13 Nov 2023 483rd albanian-laundromat 910 63 69ms 8 Nov 2025 483rd snoozingnewt 🇨🇦 910 63 65ms 18 days ago 488th Lydxn 🇨🇦 910 74 37ms 14 Jul 2021 488th JayXon 🇺🇸 910 74 38ms 20 Aug 2021 488th stefangimmillaro 910 74 40ms 22 Apr 2023 491st sisyphus-ppcg 🇦🇺 910 91 1ms 20 Jul 2022 491st UnderKoen 🇳🇱 910 91 1ms 6 Mar 2023 491st m-tkach 🇺🇦 910 91 1ms 9 Mar 2023 491st Lydxn 🇨🇦 910 91 1ms 19 Jul 2023 495th pihart 909 66 10ms 22 Jun 2020 495th Argeento 🇵🇱 909 66 9ms 13 Nov 2020 495th ovs-code 🇩🇪 909 66 10ms 29 Jul 2024 495th Lv0Sys 🇵🇱 909 66 10ms 25 days ago 499th dvargas46 🇺🇸 908 55 53ms 15 Nov 2022 500th Lydxn 🇨🇦 908 85 464ms 27 Feb 2022 500th JayXon 🇺🇸 908 85 455ms 28 Feb 2022 500th GrayJoKing 🇦🇺 908 85 438ms 13 Mar 2022 503rd anter69 🇭🇺 907 55 1,011ms 10 Mar 2025 504th Waffle3z 907 74 1ms 9 Jul 2021 505th prplz 🇦🇺 907 75 145ms 12 Oct 2021 505th YAJUE114514 907 75 139ms 30 Jul 2025 507th JayXon 🇺🇸 907 76 2ms 19 Nov 2025 508th fuzzylojik-golf 🇺🇸 907 81 340ms 7 Sep 2025 509th frankgraziano 907 144 11ms 11 Aug 2025 509th primo-ppcg 🇹🇭 907 144 12ms 13 Aug 2025 509th DialFrost 🇸🇬 907 144 9ms 13 Aug 2025 512th Yax42 🇫🇷 906 92 413ms 12 Nov 2025 513th MeWhenI 🇻🇦 905 67 4ms 16 Dec 2024 513th Yewzir 🇧🇪 905 67 5ms 20 Dec 2024 513th GrayJoKing 🇦🇺 905 67 4ms 31 Jan 2025 516th canissimia 🇦🇶 905 194 4ms 21 Sep 2021 517th MeWhenI 🇻🇦 904 65 5ms 12 Dec 2023 518th Steffan153 🇫🇮 904 91 28ms 28 Jan 2023 518th GrayJoKing 🇦🇺 904 91 27ms 28 Jan 2023 518th Lydxn 🇨🇦 904 91 27ms 28 Jan 2023 518th m-tkach 🇺🇦 904 91 27ms 18 Jan 2024 518th sean-niemann 🇺🇸 904 91 27ms 19 May 2025 523rd janbehrens 🇩🇪 903 70 5ms 26 Nov 2023 524th emplv 🇱🇻 903 77 99ms 14 Mar 2023 525th lynn 903 79 2ms 2 Oct 2021 525th MeWhenI 🇻🇦 903 79 2ms 21 Jun 2022 525th m-tkach 🇺🇦 903 79 1ms 9 Mar 2023 525th ovs-code 🇩🇪 903 79 2ms 24 Mar 2024 525th xsot 🇸🇬 903 79 2ms 23 May 2024 525th DialFrost 🇸🇬 903 79 11ms 17 Dec 2024 531st rucin93 🇵🇱 902 64 129ms 6 Sep 2024 532nd Lydxn 🇨🇦 901 91 26ms 16 Apr 2022 532nd JayXon 🇺🇸 901 91 24ms 17 Apr 2022 532nd m-tkach 🇺🇦 901 91 24ms 9 Mar 2023 535th juliansiebert 🇩🇪 900 55 232ms 31 Jul 2022 536th tailorspy 900 96 54ms 22 Sep 2024 537th MeWhenI 🇻🇦 899 75 4ms 22 Mar 2024 538th Shanethegamer 🇺🇸 897 78 137ms 7 Nov 2025 538th emgordon154 897 78 101ms 27 days ago 538th GolfingSuccess 🇬🇷 897 78 115ms 27 days ago 538th edsrzf 🇳🇿 897 78 106ms 27 days ago 538th DialFrost 🇸🇬 897 78 90ms 26 days ago 538th snoozingnewt 🇨🇦 897 78 123ms 25 days ago 538th sean-niemann 🇺🇸 897 78 99ms 17 days ago 545th thospel 896 42 150ms 25 Jun 2018 545th Lydxn 🇨🇦 896 42 176ms 21 Feb 2023 547th GolfingSuccess 🇬🇷 896 77 2ms 19 Mar 2025 547th sean-niemann 🇺🇸 896 77 2ms 19 Nov 2025 549th MeWhenI 🇻🇦 896 93 1ms 18 May 2022 550th ETHproductions 🇺🇸 895 67 10ms 14 Apr 2018 551st DaDerpDuck 894 75 1ms 24 Jan 2021 552nd marcin7Cd 894 85 5ms 15 Feb 2021 552nd primo-ppcg 🇹🇭 894 85 5ms 1 Mar 2021 552nd CLOStrophobic 🇮🇹 894 85 5ms 14 Feb 2025 555th lifthrasiir 🇰🇷 893 28 3ms 29 Nov 2024 556th Constructor7 893 68 9ms 24 Feb 2018 556th GolfingSuccess 🇬🇷 893 68 9ms 26 Mar 2018 556th kmaork 🇮🇱 893 68 9ms 18 Apr 2018 556th edre 893 68 9ms 30 Apr 2018 556th j55d 893 68 9ms 19 Sep 2018 First Prev 481–560 of 3,140 Next Last