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 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 NFA Simulator 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 NFA Simulator 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 149th isaiah0311 756 86 3ms 16 Feb 2023 149th piano-miles 756 86 3ms 30 Mar 2023 153rd razetime 747 87 3ms 22 Aug 2022 154th james-downey 739 88 3ms 9 Jul 2022 154th jhpaques 🇫🇷 739 88 3ms 4 Dec 2022 154th mamalakic 739 88 3ms 1 Mar 2023 154th xnacly 🇩🇪 739 88 2ms 5 Jul 2023 154th KrausRaus 🇺🇸 739 88 2ms 31 Jul 2023 154th dranjohn 739 88 3ms 17 Sep 2023 154th roguh 🇬🇹 739 88 3ms 15 Jan 2024 154th northsuperman 739 88 3ms 24 Mar 2024 162nd RealAMC 🇳🇿 730 89 3ms 15 Nov 2023 162nd mathb0y512 730 89 2ms 25 Jun 2024 162nd Mabeloid 🇳🇴 730 89 4ms 25 Sep 2024 165th Starwort 🇬🇧 722 90 3ms 11 Nov 2022 166th astdefu 714 91 3ms 10 Dec 2022 166th msbranicky 714 91 3ms 9 Jan 2024 168th MaxElf999 707 92 3ms 5 Feb 2023 168th ComputerKWasTaken 🇺🇸 707 92 2ms 20 Jan 2025 168th matejmatik123 🇸🇰 707 92 2ms 6 Jul 2025 171st LawrenceZ1A 🇨🇦 699 93 3ms 25 May 2022 171st jaxmattfair 🇺🇸 699 93 3ms 10 Jan 2023 171st Maximizer02 699 93 3ms 7 May 2024 171st BlueGummi 699 93 2ms 15 Apr 2025 171st 0dyse 699 93 3ms 23 Apr 2025 176th Smetalo 691 94 2ms 25 Aug 2022 176th kellantech 691 94 3ms 8 Aug 2023 176th evan18c 691 94 3ms 12 Dec 2023 179th Andrey2001 684 95 3ms 4 days ago 180th kmathis22 677 96 2ms 25 Sep 2025 181st NeatCrown 🇨🇦 670 97 3ms 14 Dec 2022 182nd calinous 🇷🇴 663 98 3ms 2 Mar 2023 182nd jtaxen 663 98 3ms 14 Apr 2024 184th 6512345 657 99 3ms 23 days ago 185th Azearia 650 100 2ms 6 Jul 2023 186th Sephirem98 637 102 3ms 25 Oct 2023 186th ottav14 637 102 3ms 15 hours ago 188th galloj 🇨🇿 631 103 2ms 20 May 2023 188th Pyro569 631 103 3ms 28 Jul 2023 190th TornadoCookie 607 107 3ms 17 Oct 2022 190th aarooosh 607 107 2ms 8 Aug 2024 192nd dillon-duncando 602 108 3ms 22 Sep 2022 192nd blaztoma 🇱🇹 602 108 3ms 13 days ago 194th MasFlam 596 109 2ms 21 Jun 2024 195th tweska 🇳🇱 591 110 2ms 5 Jun 2023 195th Jaro32768 🇸🇰 591 110 3ms 8 Feb 2024 197th michztl01 586 111 2ms 1 Jun 2022 198th kenballus 580 112 2ms 13 Jul 2022 198th nandanjp 580 112 2ms 29 Mar 2023 198th CyberTapir 580 112 2ms 27 Aug 2024 201st Giantnoodlemonster 575 113 4ms 14 Sep 2024 202nd pinguicula 570 114 3ms 6 Apr 2023 202nd fkantelberg 570 114 3ms 15 Jul 2023 202nd Blockyheadman 570 114 3ms 25 days ago 205th TerenceTux 565 115 3ms 22 May 2023 206th tik25 556 117 3ms 28 Mar 2024 207th 104210 542 120 4ms 29 Jul 2022 208th Qruintrox 537 121 4ms 25 Jun 2023 209th aDwarfNamedUrist 533 122 3ms 12 Jul 2023 209th Alex-Huggett 🇬🇧 533 122 2ms 14 Apr 2024 211th cgjohannsen 528 123 3ms 12 Jun 2022 212th TotoAJ 520 125 3ms 15 Dec 2023 212th mrmena 🇦🇺 520 125 2ms 19 Mar 2024 214th StronkCheese 🇺🇸 516 126 2ms 18 Feb 2023 215th MEarley 504 129 3ms 19 Sep 2023 216th wearsunscreen 489 133 2ms 19 Oct 2023 217th 4ndyJ 🇬🇧 485 134 3ms 16 Dec 2022 217th programmeruser2 485 134 3ms 3 Mar 2023 219th AstroOrbis 471 138 3ms 10 Jul 2025 220th julianreece 468 139 3ms 29 Apr 2025 221st myclevorname 🇺🇸 448 145 3ms 20 Aug 2023 222nd Bodo171 445 146 4ms 6 Dec 2022 223rd jameswmccarty 439 148 2ms 24 Sep 2024 224th craftablescience 417 156 3ms 19 Sep 2023 225th NOS4A5I 411 158 3ms 30 Dec 2022 First Prev 151–225 of 234 Next Last
