Happy Numbers in C# 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 1st JayXon 🇺🇸 1,000 78 397ms 21 Nov 2021 1st Lydxn 🇨🇦 1,000 78 412ms 21 Nov 2021 1st btnlq 1,000 78 375ms 10 Mar 2023 1st stefangimmillaro 1,000 78 427ms 15 Jul 2023 1st namelessiw 1,000 78 428ms 8 Aug 2024 6th nwellnhof 🇩🇪 987 79 433ms 21 Nov 2021 7th primo-ppcg 🇹🇭 975 80 424ms 21 Nov 2021 7th prplz 🇦🇺 975 80 434ms 21 Nov 2021 7th annaproxy 975 80 403ms 5 May 2022 7th tomtheisen 🇺🇸 975 80 409ms 17 Jan 2023 7th Steffan153 🇫🇮 975 80 445ms 28 Jan 2023 7th AdrienHache 🇫🇷 975 80 470ms 30 May 2023 7th MeWhenI 🇻🇦 975 80 458ms 26 Jul 2023 7th DialFrost 🇸🇬 975 80 456ms 26 Dec 2024 7th sean-niemann 🇺🇸 975 80 383ms 9 Jan 2025 7th Yax42 🇫🇷 975 80 416ms 15 Aug 2025 17th fuzzylojik-golf 🇺🇸 963 81 425ms 7 Sep 2025 18th Shanethegamer 🇺🇸 940 83 420ms 12 May 2023 18th janbehrens 🇩🇪 940 83 401ms 26 Nov 2023 18th Yewzir 🇧🇪 940 83 442ms 11 Feb 2024 18th snoozingnewt 🇨🇦 940 83 432ms 29 Nov 2025 22nd hemphen 929 84 452ms 28 Aug 2022 23rd ScottHamper 907 86 419ms 21 Nov 2021 23rd amazingalek 🇳🇴 907 86 402ms 27 Dec 2025 25th roavin 839 93 429ms 16 May 2022 26th billings7 🇬🇧 813 96 473ms 21 May 2024 27th CheeryProgrammer 757 103 440ms 21 Nov 2021 27th Matgc04 757 103 441ms 22 Aug 2023 27th arctouch-cristiannevianna 757 103 477ms 20 Feb 2024 27th dokutan 757 103 443ms 23 Nov 2025 31st Irratix 🇳🇱 750 104 369ms 13 Dec 2021 31st ericlangedijk 🇸🇮 750 104 433ms 17 Mar 2022 33rd kmathis22 729 107 431ms 29 Sep 2025 34th iznax 703 111 439ms 21 Nov 2021 34th Re-Adventures 🇮🇳 703 111 397ms 15 Apr 2025 36th CaedenHarper 🇨🇦 696 112 409ms 21 Oct 2025 37th tomh1012 690 113 469ms 5 Sep 2025 38th Hankinabag 672 116 428ms 21 Nov 2021 39th AdrialaD 655 119 396ms 21 Nov 2021 40th Meowsan91 🇨🇿 634 123 438ms 21 Nov 2021 41st petroselo 624 125 414ms 21 Nov 2021 41st wgloverDH 624 125 414ms 3 Oct 2023 41st GarethSpring 624 125 394ms 3 Oct 2023 41st KatieLG 🇬🇧 624 125 421ms 5 May 2024 41st HumanoidCPU 624 125 422ms 24 Aug 2024 46th jusaka 619 126 405ms 7 days ago 47th Adix-null 🇱🇹 614 127 441ms 30 Jul 2023 48th daniel-skalik 🇨🇿 609 128 439ms 21 Nov 2021 48th baltermia 609 128 426ms 21 Nov 2021 48th mwarvik 🇳🇴 609 128 473ms 29 Dec 2025 51st michelebastione 🇮🇹 605 129 453ms 3 days ago 52nd c0d3-4-F00d 🇩🇪 600 130 422ms 21 Nov 2021 52nd gpikmddk 600 130 431ms 12 Aug 2024 54th josephdwalker 595 131 409ms 3 Oct 2023 55th hamhub7 586 133 466ms 3 Aug 2022 56th p-vf 🇨🇭 578 135 437ms 13 Jul 2022 57th JunkIce 565 138 490ms 23 Feb 2025 58th msbranicky 557 140 448ms 28 Aug 2023 59th 0sektor0 542 144 402ms 21 Nov 2021 60th flekAI 517 151 419ms 4 days ago 61st bac0id 513 152 410ms 30 Jun 2024 62nd bschorno 510 153 403ms 4 Aug 2022 63rd mokymok 🇺🇸 503 155 395ms 21 Nov 2021 63rd muztanger 503 155 458ms 21 Nov 2021 63rd retrohun 503 155 424ms 27 Dec 2022 63rd rifatx 503 155 453ms 16 Jul 2024 63rd Mabeloid 🇳🇴 503 155 396ms 20 Sep 2024 63rd juliansiebert 🇩🇪 503 155 495ms 2 Mar 2025 69th KatieLG-Transpiler 🇬🇧 491 159 350ms 23 Jun 2022 69th ChrisTheisen 491 159 437ms 14 Dec 2022 69th zt14427 491 159 388ms 4 Mar 2023 69th kasarino 491 159 395ms 24 days ago 73rd aliakseikalosha 424 184 413ms 21 Nov 2021 73rd jiaminglimjm 🇲🇾 424 184 400ms 21 Nov 2021 75th adlerzei 396 197 425ms 16 Jun 2022 76th tdkkdt 🇷🇺 392 199 430ms 21 Nov 2021 77th TRexOnGit 388 201 424ms 2 May 2025 78th PyryL 🇫🇮 333 234 489ms 15 Mar 2025 79th kevinnaviapaiva 234 333 431ms 22 Feb 2025 80th lleszczynski-PL 92 847 458ms 21 Nov 2021 1–80 of 80