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 Mandelbrot 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 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 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 Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers 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 Knight Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal

Bytes Chars

Hole	Golfer	Bytes	Submitted
Collatz	CaedenHarper	3,232	3 days ago
Collatz	victorz-ca	80	21 Jun 2025
Collatz	codewrite	122	19 Jun 2025
Collatz	Voltrifrodec	78	19 Apr 2025
Collatz	sean-niemann	🥇 67	7 Mar 2025
Collatz	rboath	76	17 Dec 2024
Collatz	Mabeloid	3,236	17 Sep 2024
Collatz	dokutan	84	28 Jul 2024
Collatz	DialFrost	69	15 Jul 2024
Collatz	HumanoidCPU	3,232	9 May 2024
Collatz	dillon-duncando	79	9 Mar 2024
Collatz	madeforlosers	79	27 Oct 2023
Collatz	snoozingnewt	75	20 Oct 2023
Collatz	StronkCheese	81	7 Sep 2023
Collatz	msbranicky	99	15 Aug 2023
Collatz	Lydxn	🥇 67	4 Feb 2023
Collatz	retrohun	3,236	27 Dec 2022
Collatz	Alessandro-Balconi	70	26 Dec 2022
Collatz	Steffan153	🥇 67	18 Dec 2022
Collatz	vandenman	82	17 Dec 2022
Collatz	ovs-code	🥇 67	13 Dec 2022
Collatz	MeWhenI	71	13 Dec 2022
Collatz	Shanethegamer	70	12 Dec 2022
Collatz	KatieLG-Transpiler	4,235	12 Dec 2022
Collatz	KatieLG	4,235	12 Dec 2022
Collatz	nstearns96	75	12 Dec 2022