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 Dragon Curve 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 Dragon Curve 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 352ms 21 Nov 2021 1st Lydxn 🇨🇦 1,000 78 376ms 21 Nov 2021 1st btnlq 1,000 78 453ms 10 Mar 2023 1st stefangimmillaro 1,000 78 370ms 15 Jul 2023 1st namelessiw 1,000 78 447ms 8 Aug 2024 6th nwellnhof 🇩🇪 987 79 386ms 21 Nov 2021 7th primo-ppcg 🇹🇭 975 80 375ms 21 Nov 2021 7th prplz 🇦🇺 975 80 370ms 21 Nov 2021 7th annaproxy 975 80 377ms 5 May 2022 7th tomtheisen 🇺🇸 975 80 422ms 17 Jan 2023 7th Steffan153 🇫🇮 975 80 396ms 28 Jan 2023 7th AdrienHache 🇫🇷 975 80 549ms 30 May 2023 7th MeWhenI 🇻🇦 975 80 448ms 26 Jul 2023 7th DialFrost 🇸🇬 975 80 415ms 26 Dec 2024 7th sean-niemann 🇺🇸 975 80 382ms 9 Jan 2025 7th Yax42 🇫🇷 975 80 370ms 15 Aug 2025 17th fuzzylojik-golf 🇺🇸 963 81 441ms 7 Sep 2025 18th Shanethegamer 🇺🇸 940 83 367ms 12 May 2023 18th janbehrens 🇩🇪 940 83 367ms 26 Nov 2023 18th Yewzir 🇧🇪 940 83 387ms 11 Feb 2024 18th snoozingnewt 🇨🇦 940 83 424ms 29 Nov 2025 22nd hemphen 929 84 430ms 28 Aug 2022 23rd ScottHamper 907 86 368ms 21 Nov 2021 23rd amazingalek 🇳🇴 907 86 405ms 27 Dec 2025 25th roavin 839 93 379ms 16 May 2022 26th billings7 🇬🇧 813 96 415ms 21 May 2024 27th CheeryProgrammer 757 103 401ms 21 Nov 2021 27th Matgc04 757 103 442ms 22 Aug 2023 27th arctouch-cristiannevianna 757 103 462ms 20 Feb 2024 27th dokutan 757 103 438ms 23 Nov 2025 31st Irratix 🇳🇱 750 104 401ms 13 Dec 2021 31st ericlangedijk 🇸🇮 750 104 464ms 17 Mar 2022 33rd kmathis22 729 107 411ms 29 Sep 2025 34th iznax 703 111 457ms 21 Nov 2021 34th Re-Adventures 🇮🇳 703 111 414ms 15 Apr 2025 36th CaedenHarper 🇨🇦 696 112 411ms 21 Oct 2025 37th tomh1012 690 113 454ms 5 Sep 2025 38th Hankinabag 672 116 450ms 21 Nov 2021 39th AdrialaD 655 119 390ms 21 Nov 2021 40th Meowsan91 🇨🇿 634 123 454ms 21 Nov 2021 41st petroselo 624 125 368ms 21 Nov 2021 41st wgloverDH 624 125 369ms 3 Oct 2023 41st GarethSpring 624 125 391ms 3 Oct 2023 41st KatieLG 🇬🇧 624 125 395ms 5 May 2024 41st HumanoidCPU 624 125 370ms 24 Aug 2024 46th jusaka 619 126 440ms 16 days ago 47th Adix-null 🇱🇹 614 127 500ms 30 Jul 2023 48th daniel-skalik 🇨🇿 609 128 381ms 21 Nov 2021 48th baltermia 609 128 436ms 21 Nov 2021 48th mwarvik 🇳🇴 609 128 480ms 29 Dec 2025 51st michelebastione 🇮🇹 605 129 492ms 12 days ago 52nd c0d3-4-F00d 🇩🇪 600 130 403ms 21 Nov 2021 52nd gpikmddk 600 130 447ms 12 Aug 2024 54th josephdwalker 595 131 395ms 3 Oct 2023 55th hamhub7 586 133 424ms 3 Aug 2022 56th p-vf 🇨🇭 578 135 430ms 13 Jul 2022 57th JunkIce 565 138 458ms 23 Feb 2025 58th msbranicky 557 140 398ms 28 Aug 2023 59th 0sektor0 542 144 381ms 21 Nov 2021 60th bac0id 513 152 384ms 30 Jun 2024 61st bschorno 510 153 393ms 4 Aug 2022 62nd mokymok 🇺🇸 503 155 399ms 21 Nov 2021 62nd muztanger 503 155 449ms 21 Nov 2021 62nd retrohun 503 155 394ms 27 Dec 2022 62nd rifatx 503 155 435ms 16 Jul 2024 62nd Mabeloid 🇳🇴 503 155 374ms 20 Sep 2024 62nd juliansiebert 🇩🇪 503 155 477ms 2 Mar 2025 68th KatieLG-Transpiler 🇬🇧 491 159 420ms 23 Jun 2022 68th ChrisTheisen 491 159 491ms 14 Dec 2022 68th zt14427 491 159 356ms 4 Mar 2023 68th kasarino 491 159 444ms 23 Mar 2026 72nd aliakseikalosha 424 184 432ms 21 Nov 2021 72nd jiaminglimjm 🇲🇾 424 184 364ms 21 Nov 2021 74th adlerzei 396 197 419ms 16 Jun 2022 75th tdkkdt 🇷🇺 392 199 379ms 21 Nov 2021 76th TRexOnGit 388 201 377ms 2 May 2025 77th PyryL 🇫🇮 333 234 457ms 15 Mar 2025 78th kevinnaviapaiva 234 333 444ms 22 Feb 2025 79th lleszczynski-PL 92 847 495ms 21 Nov 2021 1–79 of 79