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 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 1st Lydxn 🇨🇦 1,000 49 37ms 4 May 2022 1st JayXon 🇺🇸 1,000 49 37ms 17 Oct 2022 1st GrayJoKing 🇦🇺 1,000 49 37ms 15 Nov 2022 1st radarek 🇵🇱 1,000 49 192ms 26 Aug 2025 5th canissimia 🇦🇶 980 50 42ms 5 May 2022 5th ovs-code 🇩🇪 980 50 223ms 7 May 2022 5th sisyphus-ppcg 🇦🇺 980 50 42ms 20 Feb 2023 5th Steffan153 🇫🇮 980 50 44ms 20 Jul 2024 5th sean-niemann 🇺🇸 980 50 44ms 9 Jun 2025 5th pardouin 🇫🇷 980 50 40ms 22 Aug 2025 11th nwellnhof 🇩🇪 961 51 40ms 4 May 2022 11th primo-ppcg 🇹🇭 961 51 42ms 6 May 2022 11th janlelis 961 51 38ms 10 May 2022 11th Natanaelel 🇸🇪 961 51 40ms 2 Jun 2022 11th blaztoma 🇱🇹 961 51 38ms 25 days ago 16th shinh 942 52 43ms 29 Jun 2022 17th MeWhenI 🇻🇦 925 53 39ms 1 Jun 2022 17th stefangimmillaro 925 53 39ms 2 Oct 2022 17th Haksell 🇦🇶 925 53 39ms 22 Feb 2023 20th Andriamanitra 🇫🇮 907 54 42ms 21 Jul 2022 20th jared-hughes 907 54 39ms 12 Sep 2022 20th OhmNomNom 907 54 41ms 7 Oct 2022 20th olleicua 🇺🇸 907 54 44ms 21 Jan 2024 20th LostSyntax21 🇬🇧 907 54 41ms 12 Mar 2025 20th AbrahamJLR 🇻🇪 907 54 40ms 4 Jun 2025 20th vishal-mohanty 907 54 39ms 25 Aug 2025 20th madex 🇩🇪 907 54 39ms 2 hours ago 28th SirBogman 🇺🇸 891 55 42ms 5 May 2022 28th olivermrose 🇺🇸 891 55 40ms 6 May 2022 28th 4hg 🇺🇸 891 55 40ms 24 Aug 2022 28th DialFrost 🇸🇬 891 55 39ms 1 Jan 2023 28th error256 891 55 42ms 4 May 2024 33rd ChiefChippy2 875 56 45ms 4 May 2022 33rd aksyristos 875 56 38ms 29 Jan 2023 33rd 3dm4n 🇫🇮 875 56 40ms 11 Mar 2024 33rd anter69 🇭🇺 875 56 37ms 18 Sep 2024 33rd lgrandco 875 56 39ms 9 Oct 2024 33rd D-MOVE 🇵🇭 875 56 41ms 8 Dec 2025 33rd denkyuu1 875 56 47ms 11 Feb 2026 40th Irratix 🇳🇱 860 57 40ms 29 Jun 2022 40th lacrosse 860 57 46ms 27 Nov 2025 42nd tkr-sh 🇰🇵 845 58 41ms 8 Sep 2022 42nd annaproxy 845 58 44ms 15 Sep 2023 42nd Shanethegamer 🇺🇸 845 58 39ms 25 Dec 2023 42nd emgordon154 845 58 41ms 26 Jul 2024 42nd tatzyr 🇯🇵 845 58 40ms 10 Dec 2024 47th rniii 831 59 38ms 26 Mar 2024 47th ejini6969 831 59 39ms 13 Jun 2025 47th Laellekoenig 831 59 41ms 6 Nov 2025 50th DaCuteRaccoon 817 60 45ms 5 May 2022 50th razetime 817 60 43ms 22 Aug 2022 50th janbehrens 🇩🇪 817 60 39ms 17 May 2023 53rd fynnkroeger 803 61 38ms 6 Jan 2023 53rd aaronze 🇦🇺 803 61 38ms 17 Sep 2023 55th purp 790 62 38ms 13 Aug 2022 56th RuyiLi 778 63 43ms 21 Feb 2024 56th dokutan 778 63 41ms 15 Jul 2024 58th Waffle3z 766 64 39ms 6 May 2022 58th snoozingnewt 🇨🇦 766 64 39ms 25 Oct 2025 60th KatieLG 🇬🇧 754 65 40ms 26 Dec 2023 60th TheZwierzLF 🇵🇱 754 65 41ms 6 Jan 2026 62nd Feniske 🇫🇷 742 66 40ms 8 Oct 2022 63rd adoxography 721 68 36ms 2 Mar 2024 64th vrnprkh 700 70 39ms 30 Mar 2023 64th truisseaux 700 70 37ms 12 Apr 2024 66th pfysches-boop 690 71 40ms 6 Aug 2023 66th madeforlosers 690 71 35ms 7 Nov 2024 68th beergit 681 72 36ms 7 Aug 2024 69th Ohh-n 671 73 38ms 9 Aug 2025 70th jamespeilunli 653 75 36ms 4 Jul 2022 71st kmathis22 628 78 38ms 5 Sep 2025 72nd hollma 605 81 40ms 20 Oct 2023 73rd catflip 590 83 40ms 30 Nov 2023 74th msbranicky 576 85 38ms 10 Oct 2023 75th Betuaredead 527 93 36ms 5 Jan 2023 76th yobatm 500 98 38ms 22 Aug 2025 77th sreedevk 🇺🇸 485 101 46ms 4 Dec 2022 78th JRaspass 🇬🇧 15 3,231 35ms 4 May 2022 78th KatieLG-Transpiler 🇬🇧 15 3,231 36ms 24 Jun 2022 78th retrohun 15 3,231 40ms 27 Dec 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