Collatz in all languages 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 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 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 ArkScript 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 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 ArkScript 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 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 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 # Golfer Points Bytes Time Submitted 961st the-zammers 852 68 165ms 2 Oct 2023 962nd lynn 852 96 29ms 11 Jul 2023 963rd janAkali 🇷🇺 851 77 131ms 12 Feb 2025 964th Schmitt-Very-Cool 851 98 434ms 26 Sep 2025 965th randolchance 850 63 11ms 8 Jan 2023 965th CatsAreFluffy 850 63 10ms 18 Feb 2023 965th amiralitaheri 850 63 10ms 23 Feb 2023 965th RuyiLi 850 63 11ms 1 Apr 2023 965th TaserTheFox 🇺🇸 850 63 10ms 25 May 2023 965th pfysches-boop 850 63 10ms 6 Aug 2023 965th mhgockel 850 63 10ms 19 Aug 2023 965th NickTheEASDude 🇺🇸 850 63 10ms 18 Jan 2024 965th 823126 850 63 11ms 14 Nov 2024 965th Palladium02 850 63 10ms 12 May 2025 965th 4very 850 63 10ms 10 Jun 2025 965th Ultra814 850 63 13ms 21 Aug 2025 977th inventshah 850 74 2ms 4 May 2022 977th undersquire 850 74 2ms 24 Jun 2023 977th rdmsr 850 74 2ms 24 Jun 2023 977th Bmrl7 850 74 2ms 9 Jul 2023 977th Vinterion 850 74 2ms 6 Nov 2023 977th Herbert00709 🇵🇱 850 74 2ms 22 Dec 2023 983rd krcs 🇵🇱 849 53 284ms 9 May 2022 983rd ryanlanegit 849 53 311ms 19 Jun 2022 983rd sisyphus-ppcg 🇦🇺 849 53 456ms 15 Aug 2022 986th MeWhenI 🇻🇦 849 71 110ms 13 Dec 2022 987th Shanethegamer 🇺🇸 849 98 133ms 26 Oct 2022 987th emgordon154 849 98 122ms 18 Feb 2025 989th jared-hughes 849 100 58ms 20 Jul 2022 989th ZakkkkAttackkkk 🇵🇭 849 100 60ms 10 Aug 2022 989th Walter225 849 100 61ms 25 Jul 2023 992nd DialFrost 🇸🇬 848 56 1,180ms 1 Sep 2025 992nd GolfingSuccess 🇬🇷 848 56 905ms 17 Feb 2026 994th DialFrost 🇸🇬 848 66 87ms 7 Apr 2025 994th KasperKivimaeki 🇫🇮 848 66 7ms 22 Dec 2025 996th SirBogman 🇺🇸 848 89 38ms 4 May 2022 997th MeWhenI 🇻🇦 848 164 1,639ms 7 Nov 2025 998th AdamHe17 847 73 21ms 31 May 2022 998th AliceFord 847 73 21ms 2 Jun 2022 998th Natanaelel 🇸🇪 847 73 16ms 16 Jun 2022 998th btjones0 847 73 24ms 21 Jun 2022 998th marcin7Cd 847 73 21ms 27 Jun 2022 998th tri1212 🇻🇳 847 73 21ms 18 Jul 2022 998th vhoulbreque 🇫🇷 847 73 20ms 18 Aug 2022 998th KatieLG 🇬🇧 847 73 20ms 29 Aug 2022 998th tkr-sh 🇰🇵 847 73 20ms 8 Sep 2022 998th jroscoe5 847 73 20ms 15 Sep 2022 998th fredrik-bakke 🇳🇴 847 73 19ms 18 Sep 2022 998th OhmNomNom 847 73 23ms 7 Oct 2022 998th 0-4849 847 73 21ms 1 Nov 2022 998th M0PKOBKA 847 73 25ms 19 Dec 2022 998th calumacutt 847 73 24ms 19 Dec 2022 998th thehylian 847 73 20ms 2 Jan 2023 998th fynnkroeger 847 73 22ms 6 Jan 2023 998th shellbertt 🇨🇦 847 73 20ms 13 Jan 2023 998th hunt-g 847 73 21ms 4 Feb 2023 998th ljweel 847 73 21ms 13 Feb 2023 998th jmerle 🇳🇱 847 73 20ms 16 Feb 2023 998th TaserTheFox 🇺🇸 847 73 20ms 14 Mar 2023 998th pinguicula 847 73 21ms 6 Apr 2023 998th TheoKeller1 847 73 24ms 11 Jun 2023 998th fkantelberg 847 73 19ms 16 Jul 2023 998th Mikey-Beep 🇬🇧 847 73 21ms 31 Aug 2023 998th eiburns 847 73 22ms 9 Oct 2023 998th htareque 847 73 21ms 13 Oct 2023 998th wearsunscreen 847 73 22ms 18 Oct 2023 998th Grrisly 847 73 20ms 10 Nov 2023 998th m42km 847 73 20ms 11 Nov 2023 998th GeneralPoxter 847 73 20ms 7 Dec 2023 998th logvp 847 73 24ms 12 Jan 2024 998th JoaoFelipe3 847 73 22ms 13 Jan 2024 998th ehulinsky 🇺🇸 847 73 21ms 16 Feb 2024 998th Lewenhaupt 847 73 19ms 23 Feb 2024 998th Yewzir 🇧🇪 847 73 18ms 5 Apr 2024 998th stertooy 🇧🇪 847 73 20ms 9 Jun 2024 998th cuboids 847 73 20ms 11 Jul 2024 998th jipsong 🇩🇪 847 73 20ms 23 Jul 2024 998th mattyhempstead 847 73 21ms 6 Oct 2024 998th wh3n3v3r 🇨🇿 847 73 20ms 18 Nov 2024 998th klixel 🇨🇦 847 73 20ms 18 Nov 2024 First Prev 961–1,040 of 3,639 Next Last
