The Calendar hole will go live in approximately 6 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 561st snyderek 🇺🇸 814 116 59ms 6 Oct 2024 562nd Mabeloid 🇳🇴 814 122 122ms 31 Oct 2025 562nd CaedenHarper 🇨🇦 814 122 122ms 23 days ago 564th bizy-coder 813 73 167ms 3 Oct 2024 564th Rubiksmath 813 73 160ms 19 Oct 2024 564th Seek64 🇩🇪 813 73 166ms 20 days ago 567th m-tkach 🇺🇦 813 120 28ms 18 Dec 2023 568th snoozingnewt 🇨🇦 812 66 13ms 1 Sep 2024 568th LostSyntax21 🇬🇧 812 66 4ms 8 Jan 2025 570th snoozingnewt 🇨🇦 812 105 81ms 30 Sep 2025 571st janbehrens 🇩🇪 811 73 10ms 20 Sep 2021 571st didion0 🇺🇸 811 73 41ms 23 Nov 2021 571st KatieLG 🇬🇧 811 73 14ms 5 Apr 2022 571st emgordon154 811 73 10ms 7 Nov 2024 575th edsrzf 🇳🇿 811 88 11ms 7 Jun 2025 576th Shanethegamer 🇺🇸 810 93 129ms 20 Sep 2021 576th Yewzir 🇧🇪 810 93 126ms 27 Mar 2024 578th elgan65536 808 123 124ms 5 Mar 2024 579th MeWhenI 🇻🇦 807 71 65ms 5 Apr 2025 580th AdrienHache 🇫🇷 807 94 378ms 2 Jun 2023 580th billings7 🇬🇧 807 94 373ms 21 May 2024 582nd GolfingSuccess 🇬🇷 807 117 62ms 19 Mar 2025 583rd kimbo 🇺🇸 807 146 265ms 12 Jan 2023 584th ovs-code 🇩🇪 806 66 11ms 15 Aug 2024 584th sisyphus-ppcg 🇦🇺 806 66 14ms 19 Aug 2024 586th AlephSquirrel 806 104 4ms 6 Aug 2024 587th GrayJoKing 🇦🇺 805 94 143ms 23 Oct 2023 588th Shanethegamer 🇺🇸 805 100 12ms 10 Sep 2022 588th albanian-laundromat 805 100 11ms 36 hours ago 590th MeWhenI 🇻🇦 804 90 2ms 10 Oct 2023 591st MeWhenI 🇻🇦 804 94 58ms 9 May 2024 592nd frankgraziano 804 232 37ms 31 Oct 2025 593rd KenanSi 802 32 6ms 24 Feb 2022 593rd ashtraypettingzoo 🇺🇸 802 32 6ms 5 Apr 2023 595th xnor-gate 802 74 144ms 23 Oct 2023 595th csharpython 802 74 20ms 17 Jul 2025 597th AlephSquirrel 802 89 14ms 20 Apr 2023 598th jared-hughes 801 124 127ms 10 Nov 2022 598th Re-Adventures 🇮🇳 801 124 123ms 22 Jun 2023 600th c0d3-4-F00d 🇩🇪 800 74 11ms 5 Jan 2022 600th Maznek 800 74 11ms 19 Jun 2023 600th thisishowmymindworks 🇳🇴 800 74 105ms 9 Jun 2024 600th snoozingnewt 🇨🇦 800 74 11ms 1 Sep 2024 600th blaztoma 🇱🇹 800 74 11ms 23 Nov 2025 605th tailorspy 800 118 67ms 22 Sep 2024 605th dokutan 800 118 63ms 6 Nov 2025 607th Steffan153 🇫🇮 799 95 22ms 21 Feb 2023 608th clockworknazo 798 83 13ms 13 Oct 2022 608th ovs-code 🇩🇪 798 83 13ms 7 Feb 2023 610th brimstonetrader 798 85 122ms 26 Jan 2024 611th inventshah 798 158 415ms 8 Sep 2022 612th Natanaelel 🇸🇪 796 72 71ms 26 Sep 2023 613th snoozingnewt 🇨🇦 796 148 272ms 4 Feb 2024 614th msbranicky 795 91 3ms 11 Oct 2023 615th dokutan 794 67 205ms 4 Feb 2025 616th Alessandro-Balconi 🇮🇹 794 77 86ms 14 Jul 2023 617th MeWhenI 🇻🇦 794 100 112ms 15 Oct 2022 618th Shanethegamer 🇺🇸 793 29 85ms 22 Jul 2022 619th primo-ppcg 🇹🇭 793 61 389ms 9 Feb 2022 620th DialFrost 🇸🇬 793 63 290ms 21 Jan 2025 621st MeWhenI 🇻🇦 793 110 40ms 17 Feb 2023 622nd Herbert00709 🇵🇱 793 119 64ms 4 Sep 2024 623rd wh3n3v3r 🇨🇿 791 75 23ms 13 Nov 2024 624th sisyphus-ppcg 🇦🇺 791 96 15ms 7 Apr 2022 624th DialFrost 🇸🇬 791 96 27ms 31 Oct 2024 624th sean-niemann 🇺🇸 791 96 21ms 9 Apr 2025 624th edsrzf 🇳🇿 791 96 12ms 26 Jul 2025 628th MeWhenI 🇻🇦 791 104 457ms 17 Aug 2023 629th DialFrost 🇸🇬 791 149 283ms 28 Jan 2023 629th LostSyntax21 🇬🇧 791 149 294ms 8 Jan 2025 631st MeWhenI 🇻🇦 789 96 126ms 15 Nov 2022 632nd Shanethegamer 🇺🇸 788 84 124ms 15 Jan 2023 633rd namelessiw 787 118 394ms 6 Oct 2025 634th janbehrens 🇩🇪 787 120 61ms 20 Nov 2022 634th oceko 787 120 60ms 19 Feb 2024 636th mousetail 🇳🇱 784 54 32ms 15 Jan 2024 637th NickTheEASDude 🇺🇸 783 97 18ms 9 May 2024 638th Shanethegamer 🇺🇸 782 97 363ms 20 Jun 2022 639th ian-h-chamberlain 🇺🇸 782 127 117ms 20 days ago 640th NewDefectus 🇮🇱 781 88 2ms 16 Dec 2021 First Prev 561–640 of 2,026 Next Last