The Set hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Collatz in Ruby in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 Maze Medal Tally 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 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Set Snake Sphenic Numbers Star Wars GPT Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Maze Medal Tally 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 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Set Snake Sphenic Numbers Star Wars GPT Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 1st Lydxn 🇨🇦 1,000 49 4 May 2022 1st JayXon 🇺🇸 1,000 49 17 Oct 2022 1st GrayJoKing 🇦🇺 1,000 49 15 Nov 2022 4th canissimia 🇦🇶 980 50 5 May 2022 4th ovs-code 🇩🇪 980 50 7 May 2022 4th sisyphus-ppcg 🇦🇺 980 50 20 Feb 2023 4th Steffan153 🇫🇮 980 50 20 Jul 2024 8th nwellnhof 🇩🇪 961 51 4 May 2022 8th primo-ppcg 🇹🇭 961 51 6 May 2022 8th radarek 🇵🇱 961 51 8 May 2022 8th janlelis 961 51 10 May 2022 8th Natanaelel 🇸🇪 961 51 2 Jun 2022 8th sean-niemann 🇺🇸 961 51 22 days ago 14th shinh 942 52 29 Jun 2022 15th MeWhenI 🇻🇦 925 53 1 Jun 2022 15th stefangimmillaro 925 53 2 Oct 2022 15th Haksell 🇦🇶 925 53 22 Feb 2023 15th pardouin 🇫🇷 925 53 6 Oct 2024 19th Andriamanitra 🇫🇮 907 54 21 Jul 2022 19th jared-hughes 907 54 12 Sep 2022 19th OhmNomNom 907 54 7 Oct 2022 19th olleicua 🇺🇸 907 54 21 Jan 2024 19th LostSyntax21 🇬🇧 907 54 16 days ago 24th SirBogman 🇺🇸 891 55 5 May 2022 24th xiBread 🇺🇸 891 55 6 May 2022 24th 4hg 🇺🇸 891 55 24 Aug 2022 24th DialFrost 🇸🇬 891 55 1 Jan 2023 24th error256 891 55 4 May 2024 29th ChiefChippy2 875 56 4 May 2022 29th aksyristos 875 56 29 Jan 2023 29th 3dm4n 🇫🇮 875 56 11 Mar 2024 29th anter69 🇭🇺 875 56 18 Sep 2024 29th lgrandco 875 56 9 Oct 2024 29th AbrahamJLR 875 56 28 Nov 2024 35th Irratix 🇳🇱 860 57 29 Jun 2022 36th tkr-sh 🇫🇷 845 58 8 Sep 2022 36th annaproxy 845 58 15 Sep 2023 36th Shanethegamer 🇺🇸 845 58 25 Dec 2023 36th emgordon154 845 58 26 Jul 2024 36th tatzyr 🇯🇵 845 58 10 Dec 2024 41st rniii 831 59 26 Mar 2024 42nd DaCuteRaccoon 817 60 5 May 2022 42nd razetime 817 60 22 Aug 2022 42nd janbehrens 🇩🇪 817 60 17 May 2023 45th fynnkroeger 803 61 6 Jan 2023 45th aaronze 🇦🇺 803 61 17 Sep 2023 47th purp 790 62 13 Aug 2022 48th RuyiLi 778 63 21 Feb 2024 48th dokutan 778 63 15 Jul 2024 50th Waffle3z 766 64 6 May 2022 51st KatieLG 🇬🇧 754 65 26 Dec 2023 52nd Feniske 🇫🇷 742 66 8 Oct 2022 53rd snoozingnewt 🇺🇸 721 68 11 Sep 2023 53rd adoxography 721 68 2 Mar 2024 55th vrnprkh 700 70 30 Mar 2023 55th truisseaux 700 70 12 Apr 2024 57th pfysches-boop 690 71 6 Aug 2023 57th madeforlosers 690 71 7 Nov 2024 59th beergit 681 72 7 Aug 2024 60th jamespeilunli 653 75 4 Jul 2022 61st hollma 605 81 20 Oct 2023 62nd catflip 590 83 30 Nov 2023 63rd msbranicky 576 85 10 Oct 2023 64th Betuaredead 527 93 5 Jan 2023 65th sreedevk 🇺🇸 485 101 4 Dec 2022 66th JRaspass 🇬🇧 15 3,231 4 May 2022 66th KatieLG-Transpiler 🇬🇧 15 3,231 24 Jun 2022 66th retrohun 15 3,231 27 Dec 2022 66th HumanoidCPU 15 3,231 3 May 2024 66th Mabeloid 🇳🇴 15 3,231 17 Sep 2024 1–70 of 70