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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions 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 Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 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 ><> 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 ALGOL 68 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions 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 Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 959th rdmsr 850 74 2ms 24 Jun 2023 959th Bmrl7 850 74 2ms 9 Jul 2023 959th Vinterion 850 74 4ms 6 Nov 2023 959th Herbert00709 🇵🇱 850 74 2ms 22 Dec 2023 965th krcs 🇵🇱 849 53 281ms 9 May 2022 965th ryanlanegit 849 53 312ms 19 Jun 2022 965th sisyphus-ppcg 🇦🇺 849 53 453ms 15 Aug 2022 968th MeWhenI 🇻🇦 849 71 106ms 13 Dec 2022 969th Shanethegamer 🇺🇸 849 98 121ms 26 Oct 2022 969th emgordon154 849 98 121ms 18 Feb 2025 971st jared-hughes 849 100 58ms 20 Jul 2022 971st ZakkkkAttackkkk 🇵🇭 849 100 56ms 10 Aug 2022 971st Walter225 849 100 58ms 25 Jul 2023 974th DialFrost 🇸🇬 848 66 103ms 7 Apr 2025 974th KasperKivimaeki 🇫🇮 848 66 6ms 22 Dec 2025 976th SirBogman 🇺🇸 848 89 38ms 4 May 2022 977th MeWhenI 🇻🇦 848 164 1,639ms 7 Nov 2025 978th Shanethegamer 🇺🇸 847 58 1,035ms 17 Sep 2025 979th AdamHe17 847 73 21ms 31 May 2022 979th AliceFord 847 73 22ms 2 Jun 2022 979th Natanaelel 🇸🇪 847 73 16ms 16 Jun 2022 979th btjones0 847 73 24ms 21 Jun 2022 979th marcin7Cd 847 73 21ms 27 Jun 2022 979th tri1212 🇻🇳 847 73 21ms 18 Jul 2022 979th vhoulbreque 🇫🇷 847 73 20ms 18 Aug 2022 979th KatieLG 🇬🇧 847 73 20ms 29 Aug 2022 979th tkr-sh 🇰🇵 847 73 20ms 8 Sep 2022 979th jroscoe5 847 73 21ms 15 Sep 2022 979th fredrik-bakke 🇳🇴 847 73 19ms 18 Sep 2022 979th firegene 🇮🇪 847 73 20ms 27 Sep 2022 979th OhmNomNom 847 73 23ms 7 Oct 2022 979th 0-4849 847 73 21ms 1 Nov 2022 979th M0PKOBKA 847 73 25ms 19 Dec 2022 979th calumacutt 847 73 24ms 19 Dec 2022 979th thehylian 847 73 20ms 2 Jan 2023 979th fynnkroeger 847 73 22ms 6 Jan 2023 979th shellbertt 🇨🇦 847 73 20ms 13 Jan 2023 979th hunt-g 847 73 21ms 4 Feb 2023 979th ljweel 847 73 21ms 13 Feb 2023 979th jmerle 🇳🇱 847 73 22ms 16 Feb 2023 979th TaserTheFox 🇺🇸 847 73 20ms 14 Mar 2023 979th pinguicula 847 73 22ms 6 Apr 2023 979th TheoKeller1 847 73 24ms 11 Jun 2023 979th fkantelberg 847 73 19ms 16 Jul 2023 979th Mikey-Beep 🇬🇧 847 73 21ms 31 Aug 2023 979th eiburns 847 73 22ms 9 Oct 2023 979th htareque 847 73 21ms 13 Oct 2023 979th wearsunscreen 847 73 22ms 18 Oct 2023 979th Grrisly 847 73 20ms 10 Nov 2023 979th m42km 847 73 21ms 11 Nov 2023 979th GeneralPoxter 847 73 20ms 7 Dec 2023 979th logvp 847 73 24ms 12 Jan 2024 979th JoaoFelipe3 847 73 22ms 13 Jan 2024 979th ehulinsky 🇺🇸 847 73 21ms 16 Feb 2024 979th Lewenhaupt 847 73 22ms 23 Feb 2024 979th Yewzir 🇧🇪 847 73 20ms 5 Apr 2024 979th stertooy 🇧🇪 847 73 20ms 9 Jun 2024 979th cuboids 847 73 20ms 11 Jul 2024 979th jipsong 🇩🇪 847 73 21ms 23 Jul 2024 979th mattyhempstead 847 73 23ms 6 Oct 2024 979th wh3n3v3r 🇨🇿 847 73 23ms 18 Nov 2024 979th klixel 🇨🇦 847 73 21ms 18 Nov 2024 979th tjwrenn 847 73 20ms 10 Dec 2024 979th nullie 847 73 20ms 19 Dec 2024 979th maxgodfrey2004 🇨🇦 847 73 21ms 13 Feb 2025 979th lolgeny 847 73 19ms 22 Feb 2025 979th andrewjc2000 847 73 21ms 23 Feb 2025 979th Bulmenisaurus 847 73 23ms 2 Mar 2025 979th souta-1326 847 73 22ms 1 Apr 2025 979th BenjaminHGong 847 73 21ms 26 May 2025 979th FEZfan 🇦🇺 847 73 20ms 11 Jul 2025 979th wuduculfre 847 73 21ms 28 Jul 2025 979th BREMAUCY 🇫🇷 847 73 28ms 24 Aug 2025 979th FortuiteMan 🇫🇷 847 73 21ms 28 Sep 2025 979th miaoaixuan 847 73 22ms 30 Sep 2025 979th Lv0Sys 🇵🇱 847 73 25ms 7 Dec 2025 979th zacharysfrazee 847 73 21ms 11 Jan 2026 979th bpharaldsson 847 73 20ms 11 days ago 1,039th error256 847 81 68ms 13 Sep 2024 1,040th 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