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 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 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 Calendar 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 Multitap Input NFA Simulator 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Calendar 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 Multitap Input NFA Simulator 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 222nd Steffan153 🇫🇮 930 60 5ms 28 Jan 2024 222nd JayXon 🇺🇸 930 60 4ms 29 Jan 2024 222nd rucin93 🇵🇱 930 60 5ms 10 Jul 2024 222nd sean-niemann 🇺🇸 930 60 4ms 10 Jul 2024 230th Lydxn 🇨🇦 930 70 95ms 17 Oct 2022 230th JayXon 🇺🇸 930 70 96ms 17 Oct 2022 230th GrayJoKing 🇦🇺 930 70 3ms 13 Jul 2024 230th FlyingPenguin223 930 70 5ms 4 Oct 2024 230th jipsong 🇩🇪 930 70 5ms 5 Apr 2025 235th Natanaelel 🇸🇪 929 28 193ms 22 Jul 2022 235th SirBogman 🇺🇸 929 28 175ms 17 Sep 2022 237th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 237th JayXon 🇺🇸 929 67 53ms 19 Aug 2024 239th sisyphus-ppcg 🇦🇺 928 50 2,478ms 31 Jan 2023 239th saito-ta 🇯🇵 928 50 759ms 12 Dec 2024 241st JayXon 🇺🇸 928 57 136ms 19 Aug 2024 242nd roavin 927 84 316ms 23 Jun 2022 242nd tkr-sh 🇰🇵 927 84 313ms 20 Aug 2022 242nd Nickmiste 927 84 321ms 9 Nov 2022 242nd Matgc04 927 84 319ms 19 May 2023 242nd postie77 927 84 319ms 19 May 2023 242nd ertz1ertz 927 84 317ms 13 Sep 2024 242nd Grabnukebomb 927 84 314ms 13 Sep 2024 242nd Shanethegamer 🇺🇸 927 84 341ms 9 Apr 2025 242nd HumanoidCPU 927 84 344ms 10 Apr 2025 242nd annaproxy 927 84 332ms 11 Apr 2025 242nd Re-Adventures 🇮🇳 927 84 324ms 15 Apr 2025 242nd janbehrens 🇩🇪 927 84 349ms 17 Apr 2025 242nd Flix7dev 🇧🇪 927 84 341ms 21 Oct 2025 255th h3ra993huskp 🇯🇵 926 90 342ms 7 days ago 256th JayXon 🇺🇸 926 105 256ms 4 Oct 2025 256th KasperKivimaeki 🇫🇮 926 105 259ms 4 Oct 2025 258th edsrzf 🇳🇿 925 54 788ms 13 Sep 2025 258th CaedenHarper 🇨🇦 925 54 800ms 27 Sep 2025 258th sean-niemann 🇺🇸 925 54 853ms 27 Sep 2025 258th albanian-laundromat 925 54 853ms 23 days ago 258th xsot 🇸🇬 925 54 764ms 22 days ago 263rd ovs-code 🇩🇪 925 67 92ms 13 Dec 2022 263rd Steffan153 🇫🇮 925 67 99ms 18 Dec 2022 263rd Lydxn 🇨🇦 925 67 105ms 4 Feb 2023 263rd sean-niemann 🇺🇸 925 67 105ms 7 Mar 2025 267th Lydxn 🇨🇦 924 90 124ms 6 May 2022 268th Bubbler-4 923 33 2,611ms 6 May 2022 268th rak1507 🇬🇧 923 33 112ms 8 May 2022 268th ngn 🇧🇬 923 33 25ms 11 May 2022 268th zacjl 923 33 33ms 3 Jun 2025 268th GrayJoKing 🇦🇺 923 33 15ms 4 Jun 2025 268th HPWiz 🇳🇿 923 33 9ms 21 days ago 274th nwellnhof 🇩🇪 923 51 50ms 4 May 2022 274th primo-ppcg 🇹🇭 923 51 43ms 6 May 2022 274th janlelis 923 51 39ms 10 May 2022 274th Natanaelel 🇸🇪 923 51 39ms 2 Jun 2022 278th uiamn 923 58 11ms 6 Sep 2022 278th 5quiwyrm 923 58 10ms 29 Sep 2022 278th alasdair-greenland 923 58 10ms 13 Jan 2023 278th kirjavascript 923 58 10ms 4 Aug 2025 278th Posandu 923 58 14ms 26 Aug 2025 278th mrxz 🇳🇱 923 58 11ms 3 Sep 2025 284th btnlq 923 59 8ms 6 Nov 2022 285th MichalMarsalek 🇨🇿 922 71 122ms 5 May 2022 285th Lydxn 🇨🇦 922 71 126ms 7 May 2022 285th GrayJoKing 🇦🇺 922 71 123ms 8 May 2022 285th JayXon 🇺🇸 922 71 124ms 8 May 2022 285th Steffan153 🇫🇮 922 71 120ms 9 Mar 2023 285th Shanethegamer 🇺🇸 922 71 128ms 15 May 2023 285th MeWhenI 🇻🇦 922 71 121ms 8 Aug 2023 285th sean-niemann 🇺🇸 922 71 122ms 9 Jan 2025 293rd Steffan153 🇫🇮 922 76 11ms 15 May 2023 293rd primo-ppcg 🇹🇭 922 76 18ms 15 May 2023 293rd Lydxn 🇨🇦 922 76 8ms 22 May 2023 293rd GrayJoKing 🇦🇺 922 76 12ms 24 Aug 2023 297th Herbert00709 🇵🇱 922 92 69ms 17 Nov 2023 297th 4QT0R 922 92 58ms 23 Nov 2023 297th ovs-code 🇩🇪 922 92 55ms 3 Jun 2024 300th xnor-gate 920 63 194ms 20 Jan 2025 First Prev 226–300 of 3,509 Next Last