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 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 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 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 155th Stockoh 🇫🇷 765 85 2ms 29 Sep 2024 162nd garrisonhh 756 86 2ms 22 Oct 2022 162nd tpasfieldERAU 756 86 2ms 5 Nov 2022 162nd piano-miles 756 86 2ms 30 Mar 2023 162nd JOrE20 756 86 2ms 15 Feb 2026 166th razetime 747 87 2ms 22 Aug 2022 166th Shengxuan-Zhang 747 87 2ms 20 Feb 2026 166th zgialor-lab 747 87 3ms 5 days ago 169th james-downey 739 88 2ms 9 Jul 2022 169th jhpaques 🇫🇷 739 88 2ms 4 Dec 2022 169th mamalakic 739 88 2ms 1 Mar 2023 169th xnacly 🇩🇪 739 88 2ms 5 Jul 2023 169th KrausRaus 🇺🇸 739 88 2ms 31 Jul 2023 169th dranjohn 739 88 2ms 17 Sep 2023 169th roguh 🇬🇹 739 88 2ms 15 Jan 2024 169th northsuperman 739 88 2ms 24 Mar 2024 177th RealAMC 🇳🇿 730 89 2ms 15 Nov 2023 177th mathb0y512 730 89 2ms 25 Jun 2024 177th Mabeloid 🇳🇴 730 89 2ms 25 Sep 2024 177th Vexxter9 🇳🇱 730 89 2ms 29 Jan 2026 181st Starwort 🇬🇧 722 90 2ms 11 Nov 2022 182nd astdefu 714 91 2ms 10 Dec 2022 182nd msbranicky 714 91 2ms 9 Jan 2024 184th esseeffeenne 707 92 2ms 6 Jun 2022 184th MaxElf999 707 92 2ms 5 Feb 2023 184th ComputerKWasTaken 🇺🇸 707 92 2ms 20 Jan 2025 184th matejmatik123 🇸🇰 707 92 2ms 6 Jul 2025 188th LawrenceZ1A 🇨🇦 699 93 2ms 25 May 2022 188th jaxmattfair 🇺🇸 699 93 2ms 10 Jan 2023 188th Maximizer02 699 93 2ms 7 May 2024 188th 0dyse 699 93 2ms 23 Apr 2025 192nd Smetalo 691 94 2ms 25 Aug 2022 192nd evan18c 691 94 2ms 12 Dec 2023 192nd kasarino 691 94 2ms 17 Mar 2026 195th Andrey2001 684 95 2ms 27 Nov 2025 196th kmathis22 677 96 2ms 25 Sep 2025 197th NeatCrown 🇨🇦 670 97 2ms 14 Dec 2022 198th calinous 🇷🇴 663 98 2ms 2 Mar 2023 198th jtaxen 663 98 2ms 14 Apr 2024 200th 6512345 657 99 2ms 8 Nov 2025 201st Azearia 650 100 2ms 6 Jul 2023 202nd Sephirem98 637 102 2ms 25 Oct 2023 202nd ottav14 637 102 2ms 1 Dec 2025 204th galloj 🇨🇿 631 103 2ms 20 May 2023 204th Pyro569 631 103 2ms 28 Jul 2023 206th TornadoCookie 607 107 2ms 17 Oct 2022 206th aarooosh 607 107 2ms 8 Aug 2024 208th dillon-duncando 602 108 2ms 22 Sep 2022 208th blaztoma 🇱🇹 602 108 2ms 18 Nov 2025 210th masflam 596 109 2ms 21 Jun 2024 211th tweska 🇳🇱 591 110 2ms 5 Jun 2023 211th Jaro32768 🇸🇰 591 110 2ms 8 Feb 2024 211th 0xA00 591 110 2ms 3 Dec 2025 214th michztl01 586 111 2ms 1 Jun 2022 215th kenballus 580 112 2ms 13 Jul 2022 215th nandanjp 580 112 2ms 29 Mar 2023 215th CyberTapir 580 112 2ms 27 Aug 2024 218th Giantnoodlemonster 575 113 2ms 14 Sep 2024 219th pinguicula 570 114 2ms 6 Apr 2023 219th fkantelberg 570 114 2ms 15 Jul 2023 219th Blockyheadman 570 114 2ms 6 Nov 2025 222nd TerenceTux 565 115 2ms 22 May 2023 223rd tik25 556 117 2ms 28 Mar 2024 224th 104210 542 120 2ms 29 Jul 2022 225th Qruintrox 537 121 2ms 25 Jun 2023 226th aDwarfNamedUrist 533 122 2ms 12 Jul 2023 226th Alex-Huggett 🇬🇧 533 122 2ms 14 Apr 2024 228th cgjohannsen 528 123 2ms 12 Jun 2022 229th TotoAJ 520 125 2ms 15 Dec 2023 229th mrmena 🇦🇺 520 125 2ms 19 Mar 2024 231st StronkCheese 🇺🇸 516 126 2ms 18 Feb 2023 232nd MEarley 504 129 2ms 19 Sep 2023 233rd wearsunscreen 489 133 2ms 19 Oct 2023 234th 4ndyJ 🇬🇧 485 134 2ms 16 Dec 2022 234th programmeruser2 485 134 2ms 3 Mar 2023 236th AstroOrbis 471 138 3ms 10 Jul 2025 237th julianreece 468 139 2ms 29 Apr 2025 238th 42-Slices-of-Cheese 461 141 3ms 4 hours ago 239th myclevorname 🇺🇸 448 145 2ms 20 Aug 2023 240th Bodo171 445 146 2ms 6 Dec 2022 First Prev 161–240 of 253 Next Last