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 Gray Code Decoder Gray Code Encoder 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering 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 650th hellopir2 884 70 20ms 23 Nov 2025 650th bzijlema 🇳🇱 884 70 21ms 3 Dec 2025 650th blaztoma 🇱🇹 884 70 23ms 16 Feb 2026 650th firegene 🇮🇪 884 70 20ms 25 Feb 2026 650th Googolplexo 🇷🇺 884 70 19ms 25 Mar 2026 650th edsrzf 🇳🇿 884 70 23ms 18 days ago 650th Mikey-Beep 🇬🇧 884 70 31ms 16 days ago 728th GrayJoKing 🇦🇺 884 84 35ms 19 Jun 2022 728th primo-ppcg 🇹🇭 884 84 36ms 29 Jun 2022 728th MeWhenI 🇻🇦 884 84 38ms 30 Dec 2025 731st primo-ppcg 🇹🇭 884 193 107ms 14 Aug 2025 732nd Shanethegamer 🇺🇸 883 51 474ms 15 May 2023 733rd GrayJoKing 🇦🇺 883 60 144ms 24 Oct 2024 734th Shanethegamer 🇺🇸 883 73 145ms 8 May 2025 734th DialFrost 🇸🇬 883 73 149ms 3 Jun 2025 734th edsrzf 🇳🇿 883 73 144ms 4 Jul 2025 737th Shanethegamer 🇺🇸 883 142 1,212ms 27 Mar 2025 737th DialFrost 🇸🇬 883 142 1,215ms 28 Mar 2025 737th emgordon154 883 142 1,234ms 10 Apr 2025 737th GolfingSuccess 🇬🇷 883 142 1,200ms 6 Dec 2025 741st CaedenHarper 🇨🇦 881 54 1,364ms 27 Sep 2025 741st sean-niemann 🇺🇸 881 54 1,464ms 27 Sep 2025 741st albanian-laundromat 🇺🇸 881 54 1,468ms 14 Nov 2025 741st xsot 🇸🇬 881 54 1,138ms 15 Nov 2025 745th kg583 🇺🇸 881 105 11ms 14 Mar 2026 745th Steffan153 🇫🇮 881 105 12ms 19 Mar 2026 747th dokutan 880 62 5ms 28 Apr 2025 748th johnnythedoggie 880 72 102ms 13 May 2022 748th kaascevich 880 72 104ms 8 Jul 2025 748th madeforlosers 880 72 97ms 17 Mar 2026 751st Shanethegamer 🇺🇸 879 66 172ms 4 May 2022 751st scpchicken 🇵🇼 879 66 254ms 5 May 2022 751st sisyphus-ppcg 🇦🇺 879 66 173ms 6 May 2022 751st Natanaelel 🇸🇪 879 66 144ms 15 Jun 2022 751st Z-snails 879 66 254ms 27 Feb 2023 751st Jeremy-Stafford 879 66 258ms 27 Feb 2023 751st alomiF 879 66 287ms 1 Sep 2023 751st btnlq 879 66 145ms 17 Oct 2023 751st Shengxuan-Zhang 879 66 278ms 20 Feb 2026 760th DialFrost 🇸🇬 879 86 40ms 24 Oct 2024 760th stefangimmillaro 879 86 39ms 14 Jan 2025 762nd c0d3-4-F00d 🇩🇪 878 61 12ms 6 May 2022 762nd jackkav 878 61 11ms 26 Jun 2022 762nd TechNolaByte 878 61 12ms 6 Jul 2022 762nd Heathcorp 🇦🇺 878 61 12ms 17 Jul 2022 762nd C0de5mith 🇺🇸 878 61 13ms 3 Aug 2022 762nd sebipopa 🇷🇴 878 61 11ms 18 Aug 2022 762nd moikaturns 🇬🇧 878 61 13ms 25 Sep 2022 762nd FlorianCassayre 🇫🇷 878 61 12ms 27 Sep 2022 762nd Mazn3k 878 61 13ms 1 Feb 2023 762nd tvcv901 878 61 12ms 22 Mar 2023 762nd unfinishedprogram 878 61 12ms 19 Jul 2023 762nd snoozingnewt 🇨🇦 878 61 11ms 23 Sep 2023 762nd funnyboy-roks 878 61 12ms 9 May 2024 762nd bac0id 878 61 15ms 29 Jun 2024 762nd FortuiteMan 🇫🇷 878 61 12ms 10 Oct 2024 762nd RobertHoeh 878 61 13ms 5 Apr 2025 762nd LvLError 878 61 11ms 29 May 2025 762nd miles-evan 878 61 22ms 5 Aug 2025 762nd alexsave 878 61 11ms 13 Oct 2025 762nd ComradeSquirrel 878 61 11ms 18 days ago 782nd madeforlosers 878 95 415ms 14 days ago 783rd nwellnhof 🇩🇪 877 53 6ms 4 May 2022 783rd GrayJoKing 🇦🇺 877 53 7ms 6 May 2022 785th AlephSquirrel 876 80 12ms 20 Apr 2023 785th ashtraypettingzoo 🇺🇸 876 80 14ms 1 Apr 2024 787th c0d3-4-F00d 🇩🇪 876 89 407ms 5 May 2022 787th fkantelberg 876 89 467ms 15 Jul 2023 787th TRexOnGit 876 89 387ms 16 Feb 2024 790th inventshah 876 97 58ms 6 May 2022 790th emgordon154 876 97 60ms 8 Feb 2026 792nd Shanethegamer 🇺🇸 876 98 110ms 15 Apr 2025 792nd GolfingSuccess 🇬🇷 876 98 102ms 28 Nov 2025 792nd DialFrost 🇸🇬 876 98 109ms 1 Dec 2025 795th MeWhenI 🇻🇦 876 110 346ms 9 Feb 2023 795th targrik 876 110 340ms 30 Jun 2025 797th DialFrost 🇸🇬 875 69 99ms 15 Jul 2024 798th Steffan153 🇫🇮 875 83 465ms 9 Apr 2023 798th ovs-code 🇩🇪 875 83 57ms 1 Jul 2024 800th Irratix 🇳🇱 874 72 2ms 4 May 2022 First Prev 721–800 of 3,775 Next Last