Collatz 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 1st Lydxn 🇨🇦 1,000 82 390ms 6 May 2022 1st JayXon 🇺🇸 1,000 82 389ms 9 May 2022 3rd Irratix 🇳🇱 988 83 408ms 4 May 2022 3rd nwellnhof 🇩🇪 988 83 405ms 4 May 2022 3rd ScottHamper 988 83 380ms 5 May 2022 3rd Romain-1 🇫🇷 988 83 411ms 1 Jun 2022 3rd Gaddy 🇫🇷 988 83 398ms 1 Jun 2022 3rd 5quiwyrm 988 83 379ms 4 Sep 2022 3rd Betuaredead 988 83 391ms 5 Jan 2023 3rd Yewzir 🇧🇪 988 83 385ms 12 Feb 2023 3rd btnlq 988 83 388ms 9 Mar 2023 3rd Adix-null 🇱🇹 988 83 410ms 17 May 2023 3rd AdrienHache 🇫🇷 988 83 464ms 8 Jun 2023 3rd gblikas 988 83 473ms 23 Jul 2023 3rd KrausRaus 🇺🇸 988 83 392ms 31 Jul 2023 3rd namelessiw 988 83 396ms 9 Apr 2025 3rd dokutan 988 83 391ms 9 Apr 2025 3rd m-tkach 🇺🇦 988 83 411ms 10 Apr 2025 3rd DialFrost 🇸🇬 988 83 401ms 10 Apr 2025 3rd kylejcwu 988 83 374ms 19 Apr 2025 3rd Tyrant7 988 83 409ms 19 Apr 2025 3rd Yax42 🇫🇷 988 83 442ms 19 Apr 2025 3rd MeWhenI 🇻🇦 988 83 378ms 19 Jun 2025 3rd sean-niemann 🇺🇸 988 83 400ms 20 Jun 2025 3rd stefangimmillaro 988 83 391ms 20 Jun 2025 3rd tomh1012 988 83 456ms 28 Aug 2025 3rd fuzzylojik-golf 🇺🇸 988 83 389ms 8 Sep 2025 3rd CaedenHarper 🇨🇦 988 83 377ms 17 Oct 2025 3rd arcpolaris 988 83 583ms 13 Jan 2026 3rd amazingalek 🇳🇴 988 83 450ms 21 Jan 2026 31st roavin 976 84 378ms 23 Jun 2022 31st tkr-sh 🇰🇵 976 84 369ms 20 Aug 2022 31st Nickmiste 976 84 366ms 9 Nov 2022 31st Matgc04 976 84 374ms 19 May 2023 31st postie77 976 84 383ms 19 May 2023 31st ertz1ertz 976 84 388ms 13 Sep 2024 31st Grabnukebomb 976 84 366ms 13 Sep 2024 31st Shanethegamer 🇺🇸 976 84 450ms 9 Apr 2025 31st HumanoidCPU 976 84 390ms 10 Apr 2025 31st annaproxy 976 84 416ms 11 Apr 2025 31st Re-Adventures 🇮🇳 976 84 392ms 15 Apr 2025 31st janbehrens 🇩🇪 976 84 380ms 17 Apr 2025 31st Flix7dev 🇧🇪 976 84 373ms 21 Oct 2025 44th arctouch-cristiannevianna 965 85 361ms 3 Apr 2023 44th tomtheisen 🇺🇸 965 85 424ms 10 Apr 2025 46th krcs 🇵🇱 953 86 381ms 10 May 2022 46th billings7 🇬🇧 953 86 391ms 15 May 2022 46th revlayle 🇺🇸 953 86 398ms 7 Dec 2022 46th Widgitty 953 86 396ms 1 Sep 2023 46th albanian-laundromat 953 86 539ms 30 Sep 2025 51st MichalMarsalek 🇨🇿 943 87 379ms 5 May 2022 51st Kloppermand 🇩🇰 943 87 375ms 7 Oct 2022 51st bwat2 943 87 385ms 6 Apr 2023 51st bpharaldsson 943 87 438ms 9 Feb 2026 55th SiestaGuru 932 88 374ms 9 Jan 2023 55th rifatx 932 88 398ms 5 Jul 2024 55th kmathis22 932 88 371ms 25 Sep 2025 58th c0d3-4-F00d 🇩🇪 921 89 364ms 5 May 2022 58th fkantelberg 921 89 374ms 15 Jul 2023 58th TRexOnGit 921 89 364ms 16 Feb 2024 61st bac0id 911 90 388ms 26 Sep 2023 61st deadp4nda 🇩🇪 911 90 385ms 26 Apr 2024 61st 123mjb 911 90 367ms 23 Jun 2025 61st michelebastione 🇮🇹 911 90 447ms 24 Aug 2025 61st razvandmtr 🇷🇴 911 90 400ms 6 Nov 2025 66th eshilo-draper 901 91 361ms 4 Sep 2022 66th ericlangedijk 🇸🇮 901 91 369ms 23 May 2023 66th KatieLG 🇬🇧 901 91 377ms 30 Apr 2024 66th Mikey-Beep 🇬🇧 901 91 367ms 3 Sep 2024 70th bschorno 891 92 341ms 12 Oct 2022 70th ChrisTheisen 891 92 374ms 14 Dec 2022 70th kellantech 891 92 371ms 4 Jul 2023 70th Mezzofloat 891 92 379ms 26 Aug 2023 70th Maximizer02 891 92 365ms 1 Oct 2023 70th madeforlosers 891 92 380ms 21 Nov 2024 70th ChromaChroma 891 92 432ms 7 Oct 2025 70th snoozingnewt 🇨🇦 891 92 401ms 8 Oct 2025 78th p-vf 🇨🇭 882 93 378ms 24 Jun 2022 78th Smetalo 882 93 370ms 25 Aug 2022 78th malworthy 882 93 371ms 19 Aug 2024 1–80 of 116 Next Last