Fibonacci 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 43rd solisolu 981 52 375ms 21 Nov 2025 43rd Andrey2001 981 52 416ms 24 Nov 2025 43rd KasperKivimaeki 🇫🇮 981 52 402ms 26 Nov 2025 43rd Pyroan 981 52 409ms 17 Dec 2025 43rd FlyingPenguin223 981 52 404ms 20 Jan 2026 86th bac0id 962 53 387ms 21 Nov 2021 86th daniel-skalik 🇨🇿 962 53 376ms 21 Nov 2021 86th jmhowl 962 53 392ms 21 Nov 2021 86th pallbo 962 53 381ms 21 Nov 2021 86th revlayle 🇺🇸 962 53 369ms 21 Nov 2021 86th ScottHamper 962 53 382ms 21 Nov 2021 86th theentropic 962 53 390ms 21 Nov 2021 86th KrausRaus 🇺🇸 962 53 380ms 15 Dec 2021 86th Re-Adventures 🇮🇳 962 53 370ms 15 Feb 2022 86th hemphen 962 53 376ms 30 Aug 2022 86th jhpaques 🇫🇷 962 53 392ms 3 Dec 2022 86th annaproxy 962 53 385ms 22 Jan 2023 86th nesrak1 962 53 410ms 12 Oct 2024 86th plcc0 962 53 391ms 28 Mar 2025 86th gigaprofisi 🇺🇸 962 53 392ms 15 Nov 2025 86th dokutan 962 53 386ms 18 Nov 2025 102nd AdrialaD 944 54 385ms 21 Nov 2021 102nd aliakseikalosha 944 54 395ms 21 Nov 2021 102nd cros107 🇦🇺 944 54 372ms 21 Nov 2021 102nd iznax 944 54 403ms 21 Nov 2021 102nd simon-biber 944 54 391ms 5 Feb 2022 102nd scpchicken 🇵🇼 944 54 386ms 6 Jul 2022 102nd arctouch-sergeymetlov 944 54 400ms 30 Jan 2023 102nd arctouch-cristiannevianna 944 54 388ms 30 Jan 2023 102nd Adix-null 🇱🇹 944 54 379ms 4 Jul 2023 102nd BREMAUCY 🇫🇷 944 54 403ms 18 Jul 2023 102nd mathisfun271 944 54 364ms 21 Feb 2024 102nd HumanoidCPU 944 54 378ms 16 Mar 2024 102nd andrewjc2000 944 54 380ms 7 Mar 2025 102nd Theremon72 944 54 377ms 12 Mar 2025 102nd matejmatik123 🇸🇰 944 54 380ms 12 Aug 2025 117th Hankinabag 927 55 359ms 21 Nov 2021 117th Jeffreyvde 927 55 360ms 21 Nov 2021 117th Rens-br 927 55 376ms 21 Nov 2021 117th fredrik-bakke 🇳🇴 927 55 362ms 27 Mar 2022 117th Matgc04 927 55 384ms 31 May 2023 122nd joelgduggan 911 56 379ms 21 Nov 2021 122nd marcin7Cd 911 56 356ms 21 Nov 2021 122nd pan4ever 911 56 361ms 21 Nov 2021 122nd MichaelMBradley 🇨🇦 911 56 379ms 21 Mar 2022 122nd hamhub7 911 56 378ms 5 Aug 2022 122nd madeforlosers 911 56 437ms 22 Nov 2024 122nd SwordF-Official 🇺🇸 911 56 385ms 12 Apr 2025 122nd blaztoma 🇱🇹 911 56 394ms 17 Aug 2025 130th Rhexis 895 57 385ms 21 Nov 2021 130th roavin 895 57 366ms 24 Jun 2022 130th Seanharrs 🇦🇺 895 57 390ms 25 Aug 2022 130th Tavress 895 57 385ms 11 May 2023 130th postie77 895 57 379ms 19 May 2023 130th RandGuy 895 57 365ms 25 Jan 2024 130th ashtraypettingzoo 🇺🇸 895 57 381ms 19 Mar 2024 130th ertz1ertz 895 57 385ms 12 Jul 2024 130th gblikas 895 57 373ms 17 Aug 2024 130th arcpolaris 895 57 430ms 12 Dec 2024 130th CheeseCake628 🇳🇴 895 57 404ms 17 Jul 2025 130th Emutis 🇱🇹 895 57 385ms 16 Aug 2025 130th amazingalek 🇳🇴 895 57 353ms 20 Dec 2025 143rd AndrewSalls 879 58 376ms 21 Nov 2021 143rd aplato 879 58 394ms 21 Nov 2021 143rd stdstijn 879 58 370ms 21 Nov 2021 143rd magnusbakken 879 58 363ms 6 Dec 2021 143rd p-vf 🇨🇭 879 58 353ms 16 Jul 2022 143rd neel11235813 879 58 384ms 26 Mar 2024 143rd Just4FunCoder 879 58 366ms 26 Aug 2024 143rd WalrusesAreAwesome 879 58 394ms 25 Mar 2025 151st kebal2 864 59 385ms 21 Nov 2021 151st tdkkdt 🇷🇺 864 59 378ms 21 Nov 2021 151st arctouch-andresato 864 59 384ms 11 Nov 2022 151st maki-chan 864 59 371ms 9 Jun 2023 151st LS2021 864 59 395ms 23 Nov 2023 151st acotis 864 59 365ms 11 Jan 2025 151st 123mjb 864 59 368ms 23 Jun 2025 151st ibiza240 864 59 418ms 21 Sep 2025 151st tomh1012 864 59 358ms 3 Dec 2025 151st bpharaldsson 864 59 403ms 4 Feb 2026 First Prev 81–160 of 328 Next Last