All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Alphabetic Numbers Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Chess Move Validation Christmas Trees Collatz Connect Four 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 Nim 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 Semiprime Numbers Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Snake Spelling Numbers Sphenic Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Taxicab Numbers Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle Ulam Sequence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Blackjack Dealer Box Plot Chess960 Decoder Chess960 Encoder Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering GPS Satellite Identification Hexagonal Spiral Highly Composite Numbers Huffman Encoder Langton’s Ant Lyndon Factorization Narcissistic Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Significant Figures Smooth Numbers Suit Up Thue–Morse Constant Triangular Numbers Turtle Tutorial Yellowstone Permutation 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 iogii 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 Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal ZuzuScript

Bytes Chars

Hole	Golfer	Bytes	Time	Submitted
Collatz	emgordon154	84	19ms	40 hours ago
Collatz	GolfingSuccess	🥇 75	20ms	47 hours ago
Collatz	edsrzf	🥇 75	21ms	2 days ago
Collatz	snoozingnewt	🥇 75	20ms	2 days ago
Collatz	DialFrost	🥇 75	21ms	2 days ago
Collatz	GrayJoKing	🥇 75	21ms	2 days ago
Collatz	Steffan153	🥇 75	20ms	2 days ago
Collatz	albanian-laundromat	86	22ms	2 days ago
Collatz	JOrE20	5,237	183ms	1 Oct 2026
Collatz	scpchicken	241	20ms	5 Aug 2026
Collatz	retrohun	3,243	14ms	31 May 2026
Collatz	oaiqjuy	128	19ms	19 May 2026
Collatz	CaedenHarper	5,235	60ms	22 Feb 2026
Collatz	KatieLG	5,280	14ms	21 Feb 2026
Collatz	HumanoidCPU	5,235	60ms	16 Nov 2025
Collatz	Shanethegamer	16,224	33ms	23 Apr 2025