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 473rd Steffan153 🇫🇮 896 69 18ms 15 Nov 2022 473rd AlexanderFair 896 69 24ms 19 Jul 2023 473rd pardouin 🇫🇷 896 69 18ms 11 Nov 2023 473rd AlephSquirrel 896 69 476ms 30 Dec 2023 473rd kg583 🇺🇸 896 69 25ms 28 Jan 2024 473rd davecame 896 69 23ms 20 Aug 2024 473rd zacjl 896 69 17ms 19 Sep 2024 473rd starfihs 896 69 18ms 12 Oct 2024 473rd kops-cg 896 69 23ms 9 Feb 2025 473rd sean-niemann 🇺🇸 896 69 19ms 7 Mar 2025 473rd plcc0 896 69 16ms 26 Mar 2025 473rd yujh-yujh 🇬🇸 896 69 17ms 28 Mar 2025 473rd moustave 896 69 16ms 10 Jun 2025 473rd 4atj 896 69 3,504ms 30 Jun 2025 473rd dirckvdende 896 69 17ms 11 Jul 2025 473rd xnor-gate 896 69 17ms 19 Aug 2025 473rd BrunoVisnadi 🇧🇷 896 69 24ms 1 Oct 2025 473rd Mukundan314 896 69 18ms 13 Nov 2025 473rd bizy-coder 896 69 18ms 21 Nov 2025 473rd duckyluuk 🇳🇱 896 69 18ms 4 Dec 2025 473rd bricknellj 896 69 17ms 4 Dec 2025 473rd Seek64 🇩🇪 896 69 17ms 26 Dec 2025 503rd MichalMarsalek 🇨🇿 896 87 379ms 5 May 2022 503rd Kloppermand 🇩🇰 896 87 375ms 7 Oct 2022 503rd bwat2 896 87 385ms 6 Apr 2023 503rd bpharaldsson 896 87 438ms 9 Feb 2026 507th m-tkach 🇺🇦 896 117 25ms 7 May 2022 507th Lydxn 🇨🇦 896 117 26ms 7 May 2022 509th Shanethegamer 🇺🇸 895 82 18ms 19 Dec 2023 509th edsrzf 🇳🇿 895 82 18ms 6 Jan 2025 511th CaedenHarper 🇨🇦 894 54 1,451ms 27 Sep 2025 511th sean-niemann 🇺🇸 894 54 1,442ms 27 Sep 2025 511th albanian-laundromat 894 54 959ms 14 Nov 2025 511th xsot 🇸🇬 894 54 1,025ms 15 Nov 2025 515th Shanethegamer 🇺🇸 894 61 4ms 31 Oct 2022 515th MeWhenI 🇻🇦 894 61 4ms 4 Nov 2022 517th JayXon 🇺🇸 894 74 2,178ms 14 Nov 2024 518th oeb25 894 93 137ms 16 May 2022 518th snobee 🇨🇦 894 93 127ms 8 Dec 2022 518th logvp 894 93 125ms 2 Jan 2024 518th smartiel 894 93 129ms 12 Aug 2024 518th trist224 🇫🇷 894 93 123ms 12 Aug 2024 518th nullie 894 93 124ms 19 Dec 2024 518th lolgeny 894 93 127ms 22 Feb 2025 525th GolfingSuccess 🇬🇷 894 95 61ms 5 May 2022 525th Alex-x90 🇺🇸 894 95 62ms 4 Dec 2022 525th Mandrzejy 🇵🇱 894 95 62ms 22 Mar 2024 528th Steffan153 🇫🇮 893 52 7ms 31 Dec 2022 528th blaztoma 🇱🇹 893 52 8ms 18 Jan 2026 530th Yewzir 🇧🇪 893 72 148ms 20 Nov 2025 531st KatieLG 🇬🇧 892 60 11ms 4 May 2022 531st ScottHamper 892 60 13ms 5 May 2022 531st Re-Adventures 🇮🇳 892 60 12ms 5 May 2022 531st 0x24a537r9 892 60 11ms 29 Jul 2022 531st stefangabos 🇷🇴 892 60 11ms 19 Aug 2022 531st eranws 892 60 12ms 10 Sep 2022 531st GeorgeStechman 🇬🇧 892 60 12ms 26 Sep 2022 531st BloodStormKnight 892 60 11ms 15 Oct 2022 531st dzshn 892 60 16ms 3 Dec 2022 531st biocommando 🇫🇮 892 60 13ms 20 Dec 2022 531st Betuaredead 892 60 11ms 5 Jan 2023 531st piano-miles 892 60 15ms 16 Jan 2023 531st Yewzir 🇧🇪 892 60 12ms 12 Feb 2023 531st shellbertt 🇨🇦 892 60 12ms 26 Feb 2023 531st zakariamouhid 892 60 13ms 20 May 2023 531st raphaelimahorn 892 60 14ms 23 Aug 2023 531st jbt 892 60 10ms 25 Dec 2023 531st olleicua 🇺🇸 892 60 12ms 15 Feb 2024 531st HumanoidCPU 892 60 11ms 3 May 2024 531st dokutan 892 60 13ms 13 Aug 2024 531st LostSyntax21 🇬🇧 892 60 12ms 10 Sep 2024 531st xyangst 892 60 11ms 28 Sep 2024 531st a6166231 🇨🇳 892 60 12ms 15 May 2025 531st Protothor 892 60 16ms 8 Jul 2025 531st SebassNoob 892 60 11ms 5 Aug 2025 531st levinwinter 892 60 13ms 22 Oct 2025 531st Cube14yt 892 60 12ms 16 Nov 2025 531st gigaprofisi 🇺🇸 892 60 10ms 17 Nov 2025 531st amazingalek 🇳🇴 892 60 11ms 20 Dec 2025 531st shandriy 892 60 17ms 23 Jan 2026 First Prev 481–560 of 3,623 Next Last