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 386th acollett89 907 59 13ms 17 Jun 2025 386th iczelia 🇩🇪 907 59 13ms 23 Sep 2025 386th Yax42 🇫🇷 907 59 12ms 20 Jan 2026 404th Steffan153 🇫🇮 907 80 28ms 15 Nov 2022 404th error256 907 80 122ms 8 Apr 2025 406th nipzu 906 48 46ms 8 Sep 2024 407th shinh 906 52 54ms 29 Jun 2022 408th Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 409th krcs 🇵🇱 906 86 381ms 10 May 2022 409th billings7 🇬🇧 906 86 391ms 15 May 2022 409th revlayle 🇺🇸 906 86 398ms 7 Dec 2022 409th Widgitty 906 86 396ms 1 Sep 2023 409th albanian-laundromat 906 86 430ms 30 Sep 2025 414th piano-miles 906 92 411ms 20 days ago 415th Lydxn 🇨🇦 905 70 88ms 7 May 2022 416th MeWhenI 🇻🇦 905 71 148ms 20 Aug 2024 417th m-tkach 🇺🇦 904 72 110ms 16 Oct 2022 417th GrayJoKing 🇦🇺 904 72 113ms 22 Oct 2022 417th emplv 🇱🇻 904 72 122ms 27 Oct 2022 417th sean-niemann 🇺🇸 904 72 181ms 7 Mar 2025 421st DialFrost 🇸🇬 904 74 17ms 23 days ago 421st Steffan153 🇫🇮 904 74 18ms 23 days ago 421st GrayJoKing 🇦🇺 904 74 19ms 23 days ago 421st GolfingSuccess 🇬🇷 904 74 17ms 21 days ago 421st snoozingnewt 🇨🇦 904 74 17ms 13 days ago 421st edsrzf 🇳🇿 904 74 16ms 7 days ago 427th Steffan153 🇫🇮 904 82 42ms 1 Apr 2023 427th sean-niemann 🇺🇸 904 82 42ms 12 Jul 2024 429th stefangimmillaro 904 92 128ms 24 Oct 2023 429th inverseLorentz 🇦🇺 904 92 136ms 27 May 2024 429th sean-niemann 🇺🇸 904 92 126ms 8 Jun 2025 429th ian-h-chamberlain 🇺🇸 904 92 127ms 23 Nov 2025 433rd michael-pruglo 🇺🇦 904 94 59ms 5 Jul 2022 433rd zygoloid 904 94 60ms 5 Aug 2024 433rd AdrienHache 🇫🇷 904 94 60ms 27 Dec 2025 436th Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 436th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 436th btnlq 902 69 7ms 24 Sep 2022 439th albanian-laundromat 901 107 274ms 22 Dec 2025 440th SirBogman 🇺🇸 900 50 497ms 5 May 2022 440th nwellnhof 🇩🇪 900 50 427ms 3 Jun 2022 440th Lydxn 🇨🇦 900 50 440ms 15 Aug 2022 440th Steffan153 🇫🇮 900 50 489ms 9 Aug 2024 444th Steffan153 🇫🇮 900 67 112ms 18 Dec 2022 444th Lydxn 🇨🇦 900 67 161ms 4 Feb 2023 444th sean-niemann 🇺🇸 900 67 114ms 7 Mar 2025 447th Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 448th GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 448th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 448th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 448th trinityy-7 899 70 2ms 7 Aug 2025 448th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 453rd GrayJoKing 🇦🇺 899 91 30ms 19 Jan 2023 454th Lydxn 🇨🇦 898 48 257ms 5 May 2022 454th p-zubieta 898 48 299ms 6 Mar 2024 456th NickTheEASDude 🇺🇸 898 76 6ms 7 May 2024 456th edsrzf 🇳🇿 898 76 6ms 23 Dec 2025 456th Shanethegamer 🇺🇸 898 76 5ms 23 Dec 2025 456th jared-hughes 898 76 5ms 24 Dec 2025 456th Waffle3z 898 76 5ms 26 Dec 2025 456th Blendi-Goose 898 76 5ms 6 Feb 2026 456th kTheLemon 898 76 5ms 10 days ago 463rd edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 464th DialFrost 🇸🇬 897 29 156ms 15 Mar 2025 465th Steffan153 🇫🇮 897 59 156ms 10 Aug 2024 465th rucin93 🇵🇱 897 59 190ms 13 Oct 2024 465th sean-niemann 🇺🇸 897 59 191ms 13 Oct 2024 465th lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 469th Ripick 897 73 122ms 8 May 2023 470th ovs-code 🇩🇪 897 89 458ms 24 Jul 2024 470th jipsong 🇩🇪 897 89 450ms 7 Apr 2025 470th DialFrost 🇸🇬 897 89 485ms 24 Dec 2025 470th dokutan 897 89 425ms 8 Feb 2026 474th nwellnhof 🇩🇪 896 69 24ms 4 May 2022 474th m-tkach 🇺🇦 896 69 18ms 4 May 2022 474th GolfingSuccess 🇬🇷 896 69 17ms 5 May 2022 474th jared-hughes 896 69 17ms 5 May 2022 474th ovs-code 🇩🇪 896 69 23ms 5 May 2022 474th btnlq 896 69 17ms 5 May 2022 474th sisyphus-ppcg 🇦🇺 896 69 15ms 6 May 2022 First Prev 401–480 of 3,637 Next Last