Collatz in Ruby 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 Multitap Input 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 Multitap Input 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 1st Lydxn 🇨🇦 1,000 49 35ms 4 May 2022 1st JayXon 🇺🇸 1,000 49 35ms 17 Oct 2022 1st GrayJoKing 🇦🇺 1,000 49 34ms 15 Nov 2022 1st radarek 🇵🇱 1,000 49 191ms 26 Aug 2025 5th canissimia 🇦🇶 980 50 37ms 5 May 2022 5th ovs-code 🇩🇪 980 50 269ms 7 May 2022 5th sisyphus-ppcg 🇦🇺 980 50 38ms 20 Feb 2023 5th Steffan153 🇫🇮 980 50 39ms 20 Jul 2024 5th sean-niemann 🇺🇸 980 50 37ms 9 Jun 2025 5th pardouin 🇫🇷 980 50 38ms 22 Aug 2025 11th nwellnhof 🇩🇪 961 51 36ms 4 May 2022 11th primo-ppcg 🇹🇭 961 51 38ms 6 May 2022 11th janlelis 961 51 36ms 10 May 2022 11th Natanaelel 🇸🇪 961 51 35ms 2 Jun 2022 15th shinh 942 52 36ms 29 Jun 2022 16th MeWhenI 🇻🇦 925 53 36ms 1 Jun 2022 16th stefangimmillaro 925 53 35ms 2 Oct 2022 16th Haksell 🇦🇶 925 53 36ms 22 Feb 2023 19th Andriamanitra 🇫🇮 907 54 37ms 21 Jul 2022 19th jared-hughes 907 54 37ms 12 Sep 2022 19th OhmNomNom 907 54 37ms 7 Oct 2022 19th olleicua 🇺🇸 907 54 39ms 21 Jan 2024 19th LostSyntax21 🇬🇧 907 54 38ms 12 Mar 2025 19th AbrahamJLR 🇻🇪 907 54 36ms 4 Jun 2025 19th vishal-mohanty 907 54 36ms 25 Aug 2025 26th SirBogman 🇺🇸 891 55 38ms 5 May 2022 26th olivermrose 🇺🇸 891 55 38ms 6 May 2022 26th 4hg 🇺🇸 891 55 36ms 24 Aug 2022 26th DialFrost 🇸🇬 891 55 38ms 1 Jan 2023 26th error256 891 55 36ms 4 May 2024 31st ChiefChippy2 875 56 40ms 4 May 2022 31st aksyristos 875 56 36ms 29 Jan 2023 31st 3dm4n 🇫🇮 875 56 37ms 11 Mar 2024 31st anter69 🇭🇺 875 56 35ms 18 Sep 2024 31st lgrandco 875 56 39ms 9 Oct 2024 31st D-MOVE 🇵🇭 875 56 36ms 15 hours ago 37th Irratix 🇳🇱 860 57 38ms 29 Jun 2022 37th lacrosse 860 57 48ms 11 days ago 39th tkr-sh 🇰🇵 845 58 37ms 8 Sep 2022 39th annaproxy 845 58 40ms 15 Sep 2023 39th Shanethegamer 🇺🇸 845 58 36ms 25 Dec 2023 39th emgordon154 845 58 37ms 26 Jul 2024 39th tatzyr 🇯🇵 845 58 37ms 10 Dec 2024 44th rniii 831 59 37ms 26 Mar 2024 44th ejini6969 831 59 36ms 13 Jun 2025 44th Laellekoenig 831 59 40ms 6 Nov 2025 47th DaCuteRaccoon 817 60 39ms 5 May 2022 47th razetime 817 60 37ms 22 Aug 2022 47th janbehrens 🇩🇪 817 60 36ms 17 May 2023 50th fynnkroeger 803 61 36ms 6 Jan 2023 50th aaronze 🇦🇺 803 61 36ms 17 Sep 2023 52nd purp 790 62 35ms 13 Aug 2022 53rd RuyiLi 778 63 36ms 21 Feb 2024 53rd dokutan 778 63 40ms 15 Jul 2024 55th Waffle3z 766 64 39ms 6 May 2022 55th snoozingnewt 🇨🇦 766 64 49ms 25 Oct 2025 57th KatieLG 🇬🇧 754 65 37ms 26 Dec 2023 58th Feniske 🇫🇷 742 66 36ms 8 Oct 2022 59th adoxography 721 68 34ms 2 Mar 2024 60th vrnprkh 700 70 34ms 30 Mar 2023 60th truisseaux 700 70 38ms 12 Apr 2024 62nd pfysches-boop 690 71 35ms 6 Aug 2023 62nd madeforlosers 690 71 35ms 7 Nov 2024 64th beergit 681 72 36ms 7 Aug 2024 65th Ohh-n 671 73 35ms 9 Aug 2025 66th jamespeilunli 653 75 35ms 4 Jul 2022 67th kmathis22 628 78 35ms 5 Sep 2025 68th hollma 605 81 35ms 20 Oct 2023 69th catflip 590 83 35ms 30 Nov 2023 70th msbranicky 576 85 34ms 10 Oct 2023 71st Betuaredead 527 93 36ms 5 Jan 2023 72nd yobatm 500 98 34ms 22 Aug 2025 73rd sreedevk 🇺🇸 485 101 36ms 4 Dec 2022 74th JRaspass 🇬🇧 15 3,231 34ms 4 May 2022 74th KatieLG-Transpiler 🇬🇧 15 3,231 33ms 24 Jun 2022 1–75 of 79 Next Last