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 721st Shanethegamer 🇺🇸 746 102 2ms 12 Dec 2022 721st dokutan 746 102 2ms 6 Nov 2025 723rd 386asm 🇺🇸 746 117 40ms 10 Apr 2023 724th KrausRaus 🇺🇸 745 97 2ms 24 Oct 2023 725th Shanethegamer 🇺🇸 745 131 28ms 20 Mar 2023 726th sisyphus-ppcg 🇦🇺 744 89 18ms 4 Feb 2023 726th edsrzf 🇳🇿 744 89 13ms 14 Nov 2025 728th o0lit3 🇺🇸 743 50 69ms 19 Sep 2021 728th primo-ppcg 🇹🇭 743 50 127ms 20 Sep 2021 728th nwellnhof 🇩🇪 743 50 59ms 26 Dec 2021 728th Lydxn 🇨🇦 743 50 144ms 25 May 2022 732nd Yewzir 🇧🇪 743 102 350ms 13 Jan 2024 733rd emgordon154 742 31 503ms 10 Sep 2025 734th albanian-laundromat 742 113 4ms 8 days ago 735th primo-ppcg 🇹🇭 741 80 267ms 22 Sep 2021 735th prplz 🇦🇺 741 80 213ms 18 Dec 2021 735th inventshah 741 80 303ms 10 May 2022 735th jhu04 741 80 302ms 18 Jan 2024 735th jtaxen 741 80 301ms 4 Apr 2024 735th namelessiw 741 80 213ms 14 Jul 2024 735th fgrosshans 🇫🇷 741 80 366ms 23 Jul 2024 735th EnTerr 741 80 186ms 8 Sep 2024 735th zacjl 741 80 21ms 12 Apr 2025 744th itsh01 740 80 40ms 4 Oct 2021 744th voytxt 🇨🇿 740 80 11ms 2 Mar 2022 744th dokutan 740 80 22ms 24 Dec 2024 747th Shanethegamer 🇺🇸 739 93 2ms 3 Apr 2023 747th Yewzir 🇧🇪 739 93 2ms 10 Jan 2024 749th GrayJoKing 🇦🇺 738 72 139ms 3 Aug 2024 749th emgordon154 738 72 135ms 15 Nov 2024 751st snoozingnewt 🇨🇦 738 102 96ms 13 Sep 2025 752nd jared-hughes 738 128 83ms 20 Jul 2022 752nd Alex-x90 🇺🇸 738 128 64ms 14 Nov 2022 754th KatieLG 🇬🇧 737 67 971ms 21 Sep 2021 755th AlephSquirrel 737 76 488ms 16 Jan 2024 755th JunkIce 737 76 386ms 3 Dec 2024 757th boxjelly 737 92 164ms 14 Mar 2022 758th akshatj27 🇦🇶 736 56 34ms 11 Jan 2022 758th m-tkach 🇺🇦 736 56 39ms 23 Feb 2023 760th snoozingnewt 🇨🇦 736 90 144ms 13 Oct 2025 761st Matgc04 736 103 353ms 22 Aug 2023 761st dokutan 736 103 376ms 25 days ago 763rd steffan-polygolf 735 103 120ms 19 Feb 2024 764th akamayu-ouo 🇹🇼 734 35 5ms 30 Jul 2024 765th Shanethegamer 🇺🇸 734 89 44ms 16 Apr 2024 766th SirBogman 🇺🇸 734 254 43ms 23 Nov 2022 767th j-Ewan 732 41 33ms 22 Feb 2022 767th sisyphus-ppcg 🇦🇺 732 41 272ms 31 Jan 2023 767th SirFireball3521 732 41 371ms 15 Mar 2023 770th jared-hughes 732 81 283ms 19 Sep 2021 770th jacklynnepenick 732 81 198ms 5 Nov 2021 770th guilhem-roy 🇫🇷 732 81 304ms 26 Feb 2022 770th suwat513 732 81 301ms 15 Sep 2022 770th LogicalJoe 732 81 216ms 7 Oct 2022 770th Eilonlif 🇮🇱 732 81 310ms 3 Nov 2022 770th janbehrens 🇩🇪 732 81 212ms 17 Jun 2023 770th bknower 732 81 23ms 26 Jun 2025 770th edsrzf 🇳🇿 732 81 218ms 22 Jul 2025 779th janbehrens 🇩🇪 731 64 545ms 9 Nov 2021 780th AlephSquirrel 731 81 10ms 8 Aug 2022 781st jared-hughes 731 94 2ms 14 Mar 2022 781st KenanHanke 731 94 2ms 22 Feb 2023 783rd snoozingnewt 🇨🇦 731 136 136ms 29 Sep 2025 784th primo-ppcg 🇹🇭 729 104 339ms 21 Nov 2021 784th Irratix 🇳🇱 729 104 350ms 13 Dec 2021 784th ericlangedijk 🇸🇮 729 104 376ms 17 Mar 2022 784th CaedenHarper 🇨🇦 729 104 337ms 5 Nov 2025 788th dokutan 729 109 105ms 18 Nov 2025 789th MeWhenI 🇻🇦 728 68 1,718ms 28 Jan 2023 789th Feniske 🇫🇷 728 68 1,587ms 7 Nov 2023 791st MeWhenI 🇻🇦 728 73 133ms 3 Aug 2024 792nd snoozingnewt 🇨🇦 728 84 93ms 22 Oct 2025 793rd DialFrost 🇸🇬 728 91 22ms 31 Oct 2023 794th GrayJoKing 🇦🇺 728 113 407ms 28 Feb 2022 795th neel11235813 727 77 438ms 15 Jan 2024 795th CaedenHarper 🇨🇦 727 77 571ms 14 Jul 2025 797th Shanethegamer 🇺🇸 727 104 15ms 17 Dec 2023 798th snoozingnewt 🇨🇦 727 105 38ms 1 Sep 2024 799th jerrandolph 727 162 265ms 3 Nov 2023 800th Yewzir 🇧🇪 726 90 42ms 14 Jan 2024 First Prev 721–800 of 2,025 Next Last