The Calendar hole will go live in approximately 8 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 881st OhmNomNom 698 59 48ms 20 Oct 2022 881st AlephSquirrel 698 59 84ms 14 Apr 2023 881st FlyingPenguin223 698 59 35ms 18 Oct 2023 881st SirBogman 🇺🇸 698 59 69ms 10 Jan 2024 881st error256 698 59 69ms 13 May 2024 886th aposteriorist 🇨🇦 698 85 20ms 6 Feb 2022 886th Ailko 🇧🇪 698 85 68ms 5 May 2022 886th tkr-sh 🇰🇵 698 85 20ms 17 May 2022 886th Mikey-Beep 🇬🇧 698 85 18ms 15 Jun 2022 886th P-Quentin 🇫🇷 698 85 82ms 10 Aug 2022 886th 051 🇸🇬 698 85 19ms 19 Aug 2022 886th trist224 🇫🇷 698 85 66ms 18 Oct 2022 886th Ripick 698 85 19ms 1 Feb 2023 886th fkantelberg 698 85 19ms 7 Aug 2023 886th minhtrancccp 698 85 58ms 1 Nov 2023 886th wen1now 698 85 19ms 6 Nov 2023 886th stertooy 🇧🇪 698 85 19ms 14 Jun 2024 886th FranklinJiaChen 698 85 192ms 5 Aug 2024 886th KasperKivimaeki 🇫🇮 698 85 20ms 2 Jul 2025 886th Lv0Sys 🇵🇱 698 85 28ms 17 days ago 901st Natanaelel 🇸🇪 697 33 92ms 22 Jul 2022 901st SirBogman 🇺🇸 697 33 74ms 10 Sep 2022 903rd MeWhenI 🇻🇦 697 109 2ms 27 Dec 2022 904th raphaelimahorn 696 85 10ms 2 Oct 2021 904th piano-miles 696 85 13ms 12 Mar 2023 904th Mazn3k 696 85 11ms 15 Mar 2023 904th coreynash 696 85 11ms 17 Oct 2023 908th MeWhenI 🇻🇦 696 101 4,314ms 24 Oct 2024 909th janbehrens 🇩🇪 696 109 332ms 21 Nov 2021 910th klixel 🇨🇦 695 143 127ms 11 May 2023 911th msbranicky 695 218 1,676ms 16 Sep 2025 912th CaedenHarper 🇨🇦 694 99 2ms 5 Nov 2025 913th cmayer777 694 136 81ms 7 Jan 2023 913th snoozingnewt 🇨🇦 694 136 527ms 6 Oct 2025 915th j-Ewan 693 170 273ms 10 Mar 2022 916th m42km 691 81 536ms 4 Feb 2024 917th Alex-x90 🇺🇸 691 115 97ms 14 Nov 2022 918th Lv0Sys 🇵🇱 691 119 148ms 17 days ago 919th LeeCamp 690 86 229ms 15 Jan 2023 919th vishwathg 690 86 334ms 4 Feb 2023 919th cros107 🇦🇺 690 86 242ms 11 Oct 2023 919th logvp 690 86 3,236ms 12 Jan 2024 919th Bmrl7 690 86 12ms 29 Feb 2024 919th Grrisly 690 86 279ms 29 Mar 2024 919th resoNathan 690 86 13ms 18 Jul 2024 919th RaBa21 🇭🇺 690 86 14ms 11 Jul 2025 919th Andrey2001 690 86 13ms 18 days ago 928th NewDefectus 🇮🇱 688 54 59ms 15 Dec 2021 928th LostSyntax21 🇬🇧 688 54 146ms 8 Jan 2025 930th rollershutter 688 68 320ms 3 Jul 2024 931st trinityy-7 688 86 10ms 6 Dec 2023 931st junkondo-jp 688 86 10ms 25 Jun 2024 933rd olivermrose 🇺🇸 687 60 97ms 19 Sep 2021 933rd adoxography 687 60 35ms 18 Dec 2021 933rd jared-hughes 687 60 38ms 9 Sep 2022 933rd KatieLG 🇬🇧 687 60 39ms 2 Oct 2025 933rd Lv0Sys 🇵🇱 687 60 36ms 17 days ago 938th madex 🇩🇪 687 100 2ms 10 Nov 2021 938th Babafaba 687 100 2ms 14 Oct 2025 940th Shanethegamer 🇺🇸 685 124 42ms 20 Sep 2024 941st webmiche 685 145 132ms 3 Nov 2025 942nd I-Love-47 🇺🇦 684 138 77ms 9 Feb 2022 943rd msbranicky 684 184 24ms 3 Jan 2024 944th Re-Adventures 🇮🇳 683 111 373ms 15 Apr 2025 945th ashtraypettingzoo 🇺🇸 682 44 60ms 16 Feb 2023 946th scpchicken 🇵🇼 682 87 222ms 12 Jan 2022 946th JuliaSzulc 682 87 19ms 16 Mar 2022 946th LHuitre 682 87 19ms 5 Jun 2022 946th betaveros 682 87 409ms 1 Jan 2023 946th croc54 682 87 228ms 8 Jan 2025 946th LostSyntax21 🇬🇧 682 87 207ms 8 Mar 2025 946th andrewjc2000 682 87 19ms 11 Aug 2025 953rd Shanethegamer 🇺🇸 681 145 120ms 4 Oct 2024 954th ForkKILLET 🇨🇳 680 87 783ms 10 Oct 2021 954th uttumuttu 🇫🇮 680 87 10ms 4 Jan 2022 954th Yewzir 🇧🇪 680 87 10ms 13 Jan 2024 957th emgordon154 679 223 2,068ms 20 hours ago 958th MeWhenI 🇻🇦 678 69 693ms 15 Feb 2023 959th steffan-polygolf 678 112 3ms 19 Feb 2024 960th Yewzir 🇧🇪 675 83 485ms 15 Jan 2024 First Prev 881–960 of 2,022 Next Last