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 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 881st KrausRaus 🇺🇸 749 97 2ms 24 Oct 2023 882nd 386asm 🇺🇸 749 117 40ms 10 Apr 2023 883rd Shanethegamer 🇺🇸 748 102 3ms 12 Dec 2022 883rd dokutan 748 102 3ms 6 Nov 2025 885th dokutan 748 103 376ms 23 Nov 2025 886th Shanethegamer 🇺🇸 748 131 28ms 20 Mar 2023 887th Irratix 🇳🇱 747 64 37ms 4 Mar 2022 887th annaproxy 747 64 75ms 27 Aug 2022 889th albanian-laundromat 746 113 4ms 13 days ago 890th CatsAreFluffy 745 66 4,537ms 31 Jan 2023 891st Yewzir 🇧🇪 745 111 472ms 13 Jan 2024 892nd drochom 744 94 327ms 22 Jun 2024 892nd martion2007 744 94 68ms 14 Aug 2024 894th akamayu-ouo 🇹🇼 743 35 5ms 30 Jul 2024 895th jared-hughes 743 94 2ms 14 Mar 2022 895th Shanethegamer 🇺🇸 743 94 2ms 18 Dec 2022 895th KenanHanke 743 94 2ms 22 Feb 2023 895th Yewzir 🇧🇪 743 94 2ms 10 Jan 2024 899th KatieLG 🇬🇧 742 67 971ms 21 Sep 2021 900th itsh01 742 80 40ms 4 Oct 2021 900th voytxt 🇨🇿 742 80 11ms 2 Mar 2022 900th dokutan 742 80 22ms 24 Dec 2024 903rd j-Ewan 741 41 33ms 22 Feb 2022 904th primo-ppcg 🇹🇭 741 104 339ms 21 Nov 2021 904th Irratix 🇳🇱 741 104 350ms 13 Dec 2021 904th ericlangedijk 🇸🇮 741 104 376ms 17 Mar 2022 904th Matgc04 741 104 353ms 22 Aug 2023 904th CaedenHarper 🇨🇦 741 104 337ms 5 Nov 2025 909th boxjelly 740 92 164ms 14 Mar 2022 910th jared-hughes 740 128 83ms 20 Jul 2022 910th Alex-x90 🇺🇸 740 128 64ms 14 Nov 2022 912th Shanethegamer 🇺🇸 738 89 48ms 16 Apr 2024 913th olivermrose 🇺🇸 736 65 38ms 27 Oct 2021 913th KatieLG 🇬🇧 736 65 45ms 10 Apr 2022 913th yzhs 🇩🇪 736 65 47ms 20 Jul 2022 913th DialFrost 🇸🇬 736 65 123ms 28 Jan 2023 913th edsrzf 🇳🇿 736 65 107ms 5 Nov 2024 918th AkashTandon167 736 95 67ms 2 Nov 2021 918th mhenion8293 🇺🇸 736 95 11ms 23 Jan 2022 918th 4ndyJ 🇬🇧 736 95 21ms 12 Feb 2023 918th Alex-x90 🇺🇸 736 95 19ms 13 Feb 2023 918th AlephSquirrel 736 95 2ms 8 Jun 2023 918th mathb0y512 736 95 488ms 22 Sep 2025 918th jacekwladzinski 736 95 19ms 2 Oct 2025 925th SirBogman 🇺🇸 736 254 43ms 23 Nov 2022 926th snoozingnewt 🇨🇦 735 114 14ms 30 Sep 2025 927th jerrandolph 735 162 265ms 3 Nov 2023 928th arctouch-cristiannevianna 734 105 386ms 26 May 2023 928th annaproxy 734 105 396ms 11 Apr 2025 930th yokasuretsu 733 51 215ms 16 Nov 2021 931st MeWhenI 🇻🇦 733 68 1,718ms 28 Jan 2023 931st Feniske 🇫🇷 733 68 1,587ms 7 Nov 2023 933rd AlephSquirrel 733 81 10ms 8 Aug 2022 934th snoozingnewt 🇨🇦 733 136 136ms 29 Sep 2025 935th snoozingnewt 🇨🇦 732 84 93ms 22 Oct 2025 936th dokutan 732 109 105ms 18 Nov 2025 937th GrayJoKing 🇦🇺 732 113 407ms 28 Feb 2022 938th snoozingnewt 🇨🇦 731 105 38ms 1 Sep 2024 939th Yewzir 🇧🇪 730 90 50ms 14 Jan 2024 940th pascscha 729 96 19ms 28 Mar 2022 940th vhoulbreque 🇫🇷 729 96 358ms 13 Aug 2022 940th Fanrco 729 96 308ms 4 Sep 2023 940th Europe2048 729 96 20ms 24 Nov 2024 944th Schmitt-Very-Cool 729 129 425ms 30 Sep 2025 945th scpchicken 🇵🇼 728 137 152ms 19 May 2022 946th targrik 726 164 268ms 30 Jun 2025 947th albanian-laundromat 726 190 484ms 18 Oct 2025 948th pandapawskat 725 66 48ms 7 Oct 2021 949th annaproxy 725 105 25ms 8 Jan 2023 950th randolchance 724 82 11ms 11 Jan 2023 951st MeWhenI 🇻🇦 724 118 41ms 13 Feb 2025 952nd Shanethegamer 🇺🇸 724 121 36ms 15 Dec 2022 953rd DialFrost 🇸🇬 723 110 97ms 16 Nov 2024 954th emgordon154 722 36 7ms 3 Nov 2024 955th dcgjb 722 69 1,035ms 6 May 2024 956th GolfingSuccess 🇬🇷 722 112 4ms 11 Sep 2022 957th MeWhenI 🇻🇦 722 116 59ms 13 Dec 2023 958th martinnorling 🇸🇪 721 97 69ms 2 Feb 2022 958th Pyroan 721 97 25ms 14 Mar 2025 960th GolfingSuccess 🇬🇷 720 97 3ms 19 Mar 2025 First Prev 881–960 of 2,038 Next Last