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 ><> 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 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 148th namelessiw 939 83 412ms 9 Apr 2025 148th dokutan 939 83 414ms 9 Apr 2025 148th m-tkach 🇺🇦 939 83 405ms 10 Apr 2025 148th DialFrost 🇸🇬 939 83 423ms 10 Apr 2025 148th Pecanolith 939 83 366ms 19 Apr 2025 148th Tyrant7 939 83 415ms 19 Apr 2025 148th Yax42 🇫🇷 939 83 403ms 19 Apr 2025 148th MeWhenI 🇻🇦 939 83 412ms 19 Jun 2025 148th sean-niemann 🇺🇸 939 83 412ms 20 Jun 2025 148th stefangimmillaro 939 83 409ms 20 Jun 2025 148th tomh1012 939 83 457ms 28 Aug 2025 148th fuzzylojik-golf 🇺🇸 939 83 392ms 8 Sep 2025 148th CaedenHarper 🇨🇦 939 83 398ms 17 Oct 2025 148th arcpolaris 939 83 363ms 13 Jan 2026 148th amazingalek 🇳🇴 939 83 370ms 21 Jan 2026 176th grey0ut 937 48 2,052ms 8 Apr 2025 177th GolfingSuccess 🇬🇷 937 49 38ms 12 Aug 2024 177th Shanethegamer 🇺🇸 937 49 39ms 12 Aug 2024 177th Steffan153 🇫🇮 937 49 39ms 12 Aug 2024 177th MeWhenI 🇻🇦 937 49 37ms 13 Aug 2024 177th DialFrost 🇸🇬 937 49 38ms 13 Aug 2024 177th GrayJoKing 🇦🇺 937 49 41ms 15 Aug 2024 177th btnlq 937 49 39ms 16 Aug 2024 177th emgordon154 937 49 41ms 19 Aug 2024 177th ovs-code 🇩🇪 937 49 39ms 19 Aug 2024 177th mousetail 🇳🇱 937 49 39ms 13 Sep 2024 177th lynn 937 49 39ms 20 Dec 2024 177th weeble 937 49 40ms 20 Dec 2024 177th sean-niemann 🇺🇸 937 49 39ms 11 Jan 2025 190th JayXon 🇺🇸 937 66 1,308ms 18 Nov 2025 191st DialFrost 🇸🇬 937 89 513ms 24 Sep 2025 191st ovs-code 🇩🇪 937 89 474ms 24 Sep 2025 191st dokutan 937 89 372ms 24 Sep 2025 191st sean-niemann 🇺🇸 937 89 397ms 24 Sep 2025 191st Shanethegamer 🇺🇸 937 89 477ms 25 Sep 2025 191st nwellnhof 🇩🇪 937 89 454ms 25 Sep 2025 191st m-tkach 🇺🇦 937 89 386ms 25 Sep 2025 191st namelessiw 937 89 390ms 2 Oct 2025 191st Yewzir 🇧🇪 937 89 349ms 2 Oct 2025 191st Yax42 🇫🇷 937 89 496ms 4 Oct 2025 191st stefangimmillaro 937 89 489ms 6 Oct 2025 191st CaedenHarper 🇨🇦 937 89 467ms 9 Oct 2025 191st Jacob385 937 89 491ms 27 Oct 2025 191st MeWhenI 🇻🇦 937 89 449ms 7 Nov 2025 191st ethanlally 937 89 380ms 10 Nov 2025 191st snoozingnewt 🇨🇦 937 89 384ms 23 Nov 2025 191st ScottHamper 937 89 467ms 30 Nov 2025 191st KasperKivimaeki 🇫🇮 937 89 444ms 30 Nov 2025 209th JayXon 🇺🇸 935 73 4ms 23 Dec 2025 210th nwellnhof 🇩🇪 933 42 313ms 4 May 2022 210th Lydxn 🇨🇦 933 42 1,480ms 4 May 2022 210th GrayJoKing 🇦🇺 933 42 327ms 4 May 2022 210th Steffan153 🇫🇮 933 42 330ms 16 Dec 2022 210th sisyphus-ppcg 🇦🇺 933 42 336ms 31 Jan 2023 210th ovs-code 🇩🇪 933 42 342ms 30 Dec 2023 210th sean-niemann 🇺🇸 933 42 326ms 8 Mar 2025 217th emplv 🇱🇻 933 60 11ms 5 May 2022 217th GrayJoKing 🇦🇺 933 60 9ms 6 May 2022 217th targrik 933 60 9ms 24 Dec 2024 217th xsot 🇸🇬 933 60 12ms 1 May 2025 221st m-tkach 🇺🇦 933 91 58ms 5 May 2022 221st 09cf 933 91 56ms 4 Oct 2023 223rd GrayJoKing 🇦🇺 932 56 437ms 15 Jan 2024 223rd AlephSquirrel 932 56 396ms 21 Jan 2024 223rd CaedenHarper 🇨🇦 932 56 484ms 26 Jan 2026 226th ovs-code 🇩🇪 931 60 4ms 9 Oct 2023 226th GrayJoKing 🇦🇺 931 60 4ms 11 Oct 2023 226th Lydxn 🇨🇦 931 60 5ms 11 Oct 2023 226th GolfingSuccess 🇬🇷 931 60 4ms 16 Nov 2023 226th Steffan153 🇫🇮 931 60 5ms 28 Jan 2024 226th JayXon 🇺🇸 931 60 5ms 29 Jan 2024 226th rucin93 🇵🇱 931 60 5ms 10 Jul 2024 226th sean-niemann 🇺🇸 931 60 5ms 10 Jul 2024 234th MeWhenI 🇻🇦 931 68 89ms 23 Feb 2023 234th JayXon 🇺🇸 931 68 88ms 4 Mar 2025 236th Lydxn 🇨🇦 930 70 109ms 17 Oct 2022 236th JayXon 🇺🇸 930 70 115ms 17 Oct 2022 238th Natanaelel 🇸🇪 929 28 182ms 22 Jul 2022 238th SirBogman 🇺🇸 929 28 173ms 17 Sep 2022 240th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 First Prev 161–240 of 3,598 Next Last