The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Happy Numbers (Long) in all languages in chars. 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 Chars Time Submitted 154th duckyluuk 🇳🇱 913 65 193ms 15 Aug 2024 154th CornerMercury 🇬🇧 913 65 226ms 6 Oct 2025 163rd JayXon 🇺🇸 913 129 294ms 20 Sep 2021 163rd Lydxn 🇨🇦 913 129 264ms 2 Oct 2021 163rd Steffan153 🇫🇮 913 129 267ms 3 Dec 2022 163rd emplv 🇱🇻 913 129 276ms 12 Jan 2023 163rd MeWhenI 🇻🇦 913 129 272ms 9 Feb 2023 163rd nwellnhof 🇩🇪 913 129 264ms 2 Mar 2023 163rd stefangimmillaro 913 129 272ms 14 Jun 2023 163rd Shanethegamer 🇺🇸 913 129 270ms 21 Nov 2023 163rd sean-niemann 🇺🇸 913 129 272ms 6 Dec 2023 163rd Yewzir 🇧🇪 913 129 260ms 9 Jan 2024 163rd CaedenHarper 🇨🇦 913 129 259ms 5 Nov 2025 174th HPWiz 🇳🇿 912 53 297ms 18 Mar 2022 175th DialFrost 🇸🇬 912 67 195ms 17 Mar 2025 175th ovs-code 🇩🇪 912 67 377ms 9 days ago 177th Lydxn 🇨🇦 912 109 128ms 23 May 2022 177th JayXon 🇺🇸 912 109 126ms 23 May 2022 177th r-brinke 🇳🇱 912 109 129ms 29 Jul 2022 177th acotis 912 109 125ms 28 Oct 2025 181st stackofbears 910 33 59ms 14 Mar 2025 182nd ovs-code 🇩🇪 909 63 70ms 12 Sep 2024 182nd GrayJoKing 🇦🇺 909 63 72ms 13 Sep 2024 182nd error256 909 63 67ms 13 Sep 2024 182nd Kacarott 🇦🇺 909 63 68ms 20 Sep 2024 182nd primo-ppcg 🇹🇭 909 63 64ms 5 Apr 2025 187th btnlq 908 59 4ms 5 Nov 2022 188th nwellnhof 🇩🇪 908 104 73ms 7 Dec 2022 189th Lydxn 🇨🇦 907 73 13ms 28 Feb 2023 189th Lydxn 🇨🇦 907 73 3,135ms 22 Mar 2023 191st jared-hughes 906 130 261ms 27 Feb 2024 191st KasperKivimaeki 🇫🇮 906 130 259ms 4 Oct 2025 191st albanian-laundromat 906 130 245ms 3 days ago 194th JayXon 🇺🇸 905 89 534ms 12 Sep 2022 194th btnlq 905 89 542ms 12 Sep 2022 194th Lydxn 🇨🇦 905 89 531ms 12 Sep 2022 197th annaproxy 904 75 149ms 12 Jan 2022 197th rak1507 🇬🇧 904 75 149ms 23 Feb 2022 197th alomiF 904 75 148ms 5 Oct 2023 197th Natanaelel 🇸🇪 904 75 143ms 8 May 2025 201st Lydxn 🇨🇦 904 79 4ms 13 May 2023 201st primo-ppcg 🇹🇭 904 79 12ms 20 May 2023 203rd JayXon 🇺🇸 904 91 465ms 6 Mar 2022 203rd Lydxn 🇨🇦 904 91 451ms 9 Apr 2023 203rd sean-niemann 🇺🇸 904 91 428ms 16 May 2024 203rd Steffan153 🇫🇮 904 91 446ms 21 Jul 2024 207th sean-niemann 🇺🇸 903 62 453ms 23 Dec 2024 207th emgordon154 903 62 486ms 16 Apr 2025 209th JayXon 🇺🇸 903 80 2ms 19 Nov 2025 210th Lydxn 🇨🇦 903 88 102ms 9 Apr 2023 210th JayXon 🇺🇸 903 88 100ms 9 Apr 2023 210th Steffan153 🇫🇮 903 88 104ms 9 Apr 2023 210th sean-niemann 🇺🇸 903 88 100ms 25 May 2025 214th JayXon 🇺🇸 901 78 3,867ms 5 Dec 2024 215th Lydxn 🇨🇦 901 84 120ms 2 Oct 2021 215th JayXon 🇺🇸 901 84 119ms 2 Oct 2021 215th btnlq 901 84 19ms 9 Dec 2021 215th GrayJoKing 🇦🇺 901 84 35ms 9 Dec 2021 219th nwellnhof 🇩🇪 901 103 457ms 25 Sep 2025 220th kg583 🇺🇸 900 84 17ms 28 Oct 2025 221st itsjustfreekie 899 66 312ms 20 Sep 2021 221st ZakkkkAttackkkk 🇵🇭 899 66 123ms 21 Dec 2021 221st btjones0 899 66 314ms 15 Jul 2022 221st SirBogman 🇺🇸 899 66 217ms 20 Nov 2022 221st Shanethegamer 🇺🇸 899 66 298ms 16 Dec 2022 221st adamnielson42 🇺🇸 899 66 315ms 25 Apr 2023 221st snoozingnewt 🇨🇦 899 66 311ms 3 Oct 2023 221st DialFrost 🇸🇬 899 66 225ms 18 Dec 2023 221st Just4FunCoder 899 66 310ms 17 Feb 2024 221st lifthrasiir 🇰🇷 899 66 13ms 16 Nov 2024 221st plcc0 899 66 207ms 20 Apr 2025 221st Babafaba 899 66 324ms 3 Nov 2025 233rd GrayJoKing 🇦🇺 899 97 40ms 23 Oct 2023 234th msbranicky 899 131 257ms 1 Jul 2024 235th anter69 🇭🇺 898 55 1,053ms 10 Mar 2025 236th sean-niemann 🇺🇸 898 67 758ms 16 Sep 2025 236th DialFrost 🇸🇬 898 67 780ms 12 Nov 2025 238th primo-ppcg 🇹🇭 898 85 39ms 22 Sep 2021 238th cure-honey 🇯🇵 898 85 39ms 27 Sep 2021 238th marshallward 🇺🇸 898 85 41ms 2 Sep 2022 First Prev 161–240 of 2,025 Next Last