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 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 Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 149th KrausRaus 🇺🇸 939 83 399ms 31 Jul 2023 149th namelessiw 939 83 412ms 9 Apr 2025 149th dokutan 939 83 414ms 9 Apr 2025 149th m-tkach 🇺🇦 939 83 405ms 10 Apr 2025 149th DialFrost 🇸🇬 939 83 423ms 10 Apr 2025 149th kylejcwu 939 83 366ms 19 Apr 2025 149th Tyrant7 939 83 415ms 19 Apr 2025 149th Yax42 🇫🇷 939 83 403ms 19 Apr 2025 149th MeWhenI 🇻🇦 939 83 412ms 19 Jun 2025 149th sean-niemann 🇺🇸 939 83 412ms 20 Jun 2025 149th stefangimmillaro 939 83 409ms 20 Jun 2025 149th tomh1012 939 83 457ms 28 Aug 2025 149th fuzzylojik-golf 🇺🇸 939 83 392ms 8 Sep 2025 149th CaedenHarper 🇨🇦 939 83 398ms 17 Oct 2025 149th arcpolaris 939 83 363ms 13 Jan 2026 149th amazingalek 🇳🇴 939 83 370ms 21 Jan 2026 177th grey0ut 937 48 2,052ms 8 Apr 2025 178th GolfingSuccess 🇬🇷 937 49 38ms 12 Aug 2024 178th Shanethegamer 🇺🇸 937 49 39ms 12 Aug 2024 178th Steffan153 🇫🇮 937 49 39ms 12 Aug 2024 178th MeWhenI 🇻🇦 937 49 37ms 13 Aug 2024 178th DialFrost 🇸🇬 937 49 38ms 13 Aug 2024 178th GrayJoKing 🇦🇺 937 49 41ms 15 Aug 2024 178th btnlq 937 49 39ms 16 Aug 2024 178th emgordon154 937 49 41ms 19 Aug 2024 178th ovs-code 🇩🇪 937 49 39ms 19 Aug 2024 178th mousetail 🇳🇱 937 49 39ms 13 Sep 2024 178th lynn 937 49 39ms 20 Dec 2024 178th weeble 937 49 40ms 20 Dec 2024 178th sean-niemann 🇺🇸 937 49 39ms 11 Jan 2025 191st JayXon 🇺🇸 937 66 1,308ms 18 Nov 2025 192nd DialFrost 🇸🇬 937 89 513ms 24 Sep 2025 192nd ovs-code 🇩🇪 937 89 474ms 24 Sep 2025 192nd dokutan 937 89 372ms 24 Sep 2025 192nd sean-niemann 🇺🇸 937 89 397ms 24 Sep 2025 192nd Shanethegamer 🇺🇸 937 89 477ms 25 Sep 2025 192nd nwellnhof 🇩🇪 937 89 454ms 25 Sep 2025 192nd m-tkach 🇺🇦 937 89 386ms 25 Sep 2025 192nd namelessiw 937 89 390ms 2 Oct 2025 192nd Yewzir 🇧🇪 937 89 349ms 2 Oct 2025 192nd Yax42 🇫🇷 937 89 496ms 4 Oct 2025 192nd stefangimmillaro 937 89 489ms 6 Oct 2025 192nd CaedenHarper 🇨🇦 937 89 467ms 9 Oct 2025 192nd Jacob385 937 89 491ms 27 Oct 2025 192nd MeWhenI 🇻🇦 937 89 449ms 7 Nov 2025 192nd ethanlally 937 89 380ms 10 Nov 2025 192nd snoozingnewt 🇨🇦 937 89 384ms 23 Nov 2025 192nd ScottHamper 937 89 467ms 30 Nov 2025 192nd KasperKivimaeki 🇫🇮 937 89 444ms 30 Nov 2025 210th JayXon 🇺🇸 935 73 4ms 23 Dec 2025 211th nwellnhof 🇩🇪 933 42 377ms 4 May 2022 211th Lydxn 🇨🇦 933 42 1,544ms 4 May 2022 211th GrayJoKing 🇦🇺 933 42 373ms 4 May 2022 211th Steffan153 🇫🇮 933 42 368ms 16 Dec 2022 211th sisyphus-ppcg 🇦🇺 933 42 347ms 31 Jan 2023 211th ovs-code 🇩🇪 933 42 371ms 30 Dec 2023 211th sean-niemann 🇺🇸 933 42 358ms 8 Mar 2025 218th emplv 🇱🇻 933 60 9ms 5 May 2022 218th GrayJoKing 🇦🇺 933 60 9ms 6 May 2022 218th targrik 933 60 9ms 24 Dec 2024 218th xsot 🇸🇬 933 60 12ms 1 May 2025 222nd m-tkach 🇺🇦 933 91 57ms 5 May 2022 222nd 09cf 933 91 56ms 4 Oct 2023 224th GrayJoKing 🇦🇺 932 56 437ms 15 Jan 2024 224th AlephSquirrel 932 56 396ms 21 Jan 2024 224th CaedenHarper 🇨🇦 932 56 484ms 26 Jan 2026 227th ovs-code 🇩🇪 931 60 5ms 9 Oct 2023 227th GrayJoKing 🇦🇺 931 60 4ms 11 Oct 2023 227th Lydxn 🇨🇦 931 60 4ms 11 Oct 2023 227th GolfingSuccess 🇬🇷 931 60 4ms 16 Nov 2023 227th Steffan153 🇫🇮 931 60 4ms 28 Jan 2024 227th JayXon 🇺🇸 931 60 4ms 29 Jan 2024 227th rucin93 🇵🇱 931 60 5ms 10 Jul 2024 227th sean-niemann 🇺🇸 931 60 5ms 10 Jul 2024 227th edsrzf 🇳🇿 931 60 5ms 11 hours ago 236th MeWhenI 🇻🇦 931 68 91ms 23 Feb 2023 236th JayXon 🇺🇸 931 68 94ms 4 Mar 2025 238th Lydxn 🇨🇦 930 70 110ms 17 Oct 2022 238th JayXon 🇺🇸 930 70 120ms 17 Oct 2022 240th Natanaelel 🇸🇪 929 28 182ms 22 Jul 2022 First Prev 161–240 of 3,616 Next Last