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 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 Gray Code Decoder Gray Code Encoder 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

Hole	Golfer	Bytes	Time	Submitted
Collatz	madeforlosers	120	420ms	4 days ago
Collatz	KatieLG	2,296	70ms	30 Nov 2025
Collatz	6512345	94	353ms	21 Nov 2025
Collatz	gigaprofisi	3,234	65ms	13 Nov 2025
Collatz	albanian-laundromat	87	546ms	5 Oct 2025
Collatz	kmathis22	123	247ms	5 Sep 2025
Collatz	dokutan	154	115ms	3 Apr 2025
Collatz	CaedenHarper	3,234	71ms	25 Jan 2025
Collatz	DialFrost	87	594ms	16 Nov 2024
Collatz	Mabeloid	3,234	69ms	17 Sep 2024
Collatz	HumanoidCPU	3,234	73ms	3 May 2024
Collatz	snoozingnewt	168	128ms	11 Sep 2023
Collatz	kellantech	146	261ms	30 May 2023
Collatz	Steffan153	🥉 83	465ms	9 Apr 2023
Collatz	Lydxn	🥇 79	556ms	9 Apr 2023
Collatz	JayXon	🥇 79	560ms	5 Apr 2023
Collatz	StronkCheese	3,234	71ms	1 Feb 2023
Collatz	retrohun	3,234	74ms	27 Dec 2022
Collatz	MaxElf999	146	128ms	15 Dec 2022
Collatz	tamanugi	104	322ms	18 Nov 2022
Collatz	KatieLG-Transpiler	3,234	70ms	24 Jun 2022
Collatz	MeWhenI	99	473ms	1 Jun 2022
Collatz	GrayJoKing	85	407ms	20 May 2022
Collatz	Shanethegamer	85	429ms	18 May 2022
Collatz	sobbybutter	321	121ms	17 May 2022
Collatz	Waffle3z	3,234	66ms	15 May 2022
Collatz	JRaspass	3,234	67ms	15 May 2022