Collatz in C in chars. 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 Multitap Input 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 ><> 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 Multitap Input 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 Chars Time Submitted 145th Stockoh 🇫🇷 753 85 2ms 29 Sep 2024 152nd garrisonhh 744 86 2ms 22 Oct 2022 152nd tpasfieldERAU 744 86 2ms 5 Nov 2022 152nd isaiah0311 744 86 2ms 16 Feb 2023 152nd piano-miles 744 86 2ms 30 Mar 2023 156th razetime 736 87 2ms 22 Aug 2022 157th james-downey 727 88 2ms 9 Jul 2022 157th jhpaques 🇫🇷 727 88 2ms 4 Dec 2022 157th mamalakic 727 88 2ms 1 Mar 2023 157th xnacly 🇩🇪 727 88 2ms 5 Jul 2023 157th KrausRaus 🇺🇸 727 88 2ms 31 Jul 2023 157th dranjohn 727 88 3ms 17 Sep 2023 157th roguh 🇬🇹 727 88 2ms 15 Jan 2024 157th northsuperman 727 88 2ms 24 Mar 2024 165th RealAMC 🇳🇿 719 89 2ms 15 Nov 2023 165th mathb0y512 719 89 2ms 25 Jun 2024 165th Mabeloid 🇳🇴 719 89 2ms 25 Sep 2024 168th Starwort 🇬🇧 711 90 2ms 11 Nov 2022 169th astdefu 703 91 2ms 10 Dec 2022 169th msbranicky 703 91 2ms 9 Jan 2024 171st esseeffeenne 696 92 2ms 6 Jun 2022 171st MaxElf999 696 92 2ms 5 Feb 2023 171st ComputerKWasTaken 🇺🇸 696 92 2ms 20 Jan 2025 171st matejmatik123 🇸🇰 696 92 2ms 6 Jul 2025 175th LawrenceZ1A 🇨🇦 688 93 3ms 25 May 2022 175th jaxmattfair 🇺🇸 688 93 2ms 10 Jan 2023 175th Maximizer02 688 93 2ms 7 May 2024 175th BlueGummi 688 93 2ms 15 Apr 2025 175th 0dyse 688 93 2ms 23 Apr 2025 180th Smetalo 681 94 2ms 25 Aug 2022 180th kellantech 681 94 2ms 8 Aug 2023 180th evan18c 681 94 6ms 12 Dec 2023 183rd Andrey2001 674 95 2ms 13 days ago 184th kmathis22 667 96 2ms 25 Sep 2025 185th NeatCrown 🇨🇦 660 97 2ms 14 Dec 2022 186th calinous 🇷🇴 653 98 2ms 2 Mar 2023 186th jtaxen 653 98 2ms 14 Apr 2024 188th 6512345 646 99 2ms 8 Nov 2025 189th Azearia 640 100 2ms 6 Jul 2023 190th Sephirem98 627 102 2ms 25 Oct 2023 190th ottav14 627 102 2ms 10 days ago 192nd galloj 🇨🇿 621 103 2ms 20 May 2023 192nd Pyro569 621 103 2ms 28 Jul 2023 194th TornadoCookie 604 106 2ms 17 Oct 2022 195th aarooosh 598 107 2ms 8 Aug 2024 196th dillon-duncando 593 108 2ms 22 Sep 2022 196th blaztoma 🇱🇹 593 108 3ms 22 days ago 198th masflam 587 109 2ms 21 Jun 2024 199th tweska 🇳🇱 582 110 2ms 5 Jun 2023 199th Jaro32768 🇸🇰 582 110 2ms 8 Feb 2024 199th 0xA00 582 110 2ms 8 days ago 202nd michztl01 577 111 2ms 1 Jun 2022 203rd kenballus 571 112 2ms 13 Jul 2022 203rd nandanjp 571 112 2ms 29 Mar 2023 203rd CyberTapir 571 112 2ms 27 Aug 2024 206th Giantnoodlemonster 566 113 2ms 14 Sep 2024 207th pinguicula 561 114 2ms 6 Apr 2023 207th fkantelberg 561 114 2ms 15 Jul 2023 207th Blockyheadman 561 114 2ms 6 Nov 2025 210th TerenceTux 557 115 2ms 22 May 2023 211th tik25 547 117 2ms 28 Mar 2024 212th 104210 533 120 2ms 29 Jul 2022 213th Qruintrox 529 121 2ms 25 Jun 2023 214th aDwarfNamedUrist 525 122 2ms 12 Jul 2023 214th Alex-Huggett 🇬🇧 525 122 2ms 14 Apr 2024 216th cgjohannsen 520 123 2ms 12 Jun 2022 217th TotoAJ 512 125 2ms 15 Dec 2023 217th mrmena 🇦🇺 512 125 2ms 19 Mar 2024 219th StronkCheese 🇺🇸 508 126 2ms 18 Feb 2023 220th MEarley 496 129 2ms 19 Sep 2023 221st wearsunscreen 481 133 2ms 19 Oct 2023 222nd 4ndyJ 🇬🇧 478 134 2ms 16 Dec 2022 222nd programmeruser2 478 134 2ms 3 Mar 2023 224th AstroOrbis 464 138 3ms 10 Jul 2025 225th julianreece 460 139 2ms 29 Apr 2025 First Prev 151–225 of 239 Next Last