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 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 Apéry’s Constant Binary Lambda Calculus 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 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 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 Apéry’s Constant Binary Lambda Calculus 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 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 622nd myfatemi04 883 70 20ms 4 Nov 2022 622nd kevinmchung 883 70 19ms 4 Nov 2022 622nd FlorianCassayre 🇫🇷 883 70 18ms 7 Nov 2022 622nd fourth-bit 883 70 19ms 29 Nov 2022 622nd QuincyNash 🇺🇸 883 70 20ms 29 Nov 2022 622nd aksyristos 883 70 20ms 25 Dec 2022 622nd thizanne 883 70 20ms 27 Dec 2022 622nd Alex-x90 🇺🇸 883 70 20ms 20 Jan 2023 622nd bob-th 883 70 20ms 24 Jan 2023 622nd SirFireball3521 883 70 17ms 25 Jan 2023 622nd stefangimmillaro 883 70 21ms 6 Feb 2023 622nd FieryIceStickie 883 70 18ms 3 Apr 2023 622nd MeWhenI 🇻🇦 883 70 19ms 30 Apr 2023 622nd fgrosshans 🇫🇷 883 70 18ms 5 May 2023 622nd Shanethegamer 🇺🇸 883 70 20ms 25 May 2023 622nd InigoK 🇺🇸 883 70 20ms 14 Jun 2023 622nd quimey 883 70 16ms 15 Jun 2023 622nd CornerMercury 🇬🇧 883 70 20ms 19 Jun 2023 622nd ndren 883 70 19ms 2 Aug 2023 622nd janbehrens 🇩🇪 883 70 21ms 24 Nov 2023 622nd namelessiw 883 70 19ms 9 Jan 2024 622nd mathisfun271 883 70 20ms 13 Feb 2024 622nd Just4FunCoder 883 70 20ms 17 Feb 2024 622nd ThijsLuttikhuis 883 70 20ms 3 Mar 2024 622nd elgan65536 🇺🇸 883 70 19ms 5 Mar 2024 622nd jtaxen 883 70 19ms 1 Apr 2024 622nd HumanoidCPU 883 70 19ms 6 May 2024 622nd abc7-12 883 70 22ms 6 May 2024 622nd ahmetdemirag 🇨🇾 883 70 20ms 9 Jun 2024 622nd FranklinJiaChen 883 70 18ms 4 Jul 2024 622nd 5cw 🇺🇸 883 70 21ms 13 Jul 2024 622nd CaedenHarper 🇨🇦 883 70 21ms 3 Aug 2024 622nd emgordon154 883 70 20ms 5 Aug 2024 622nd dokutan 883 70 19ms 9 Aug 2024 622nd jatloe 883 70 20ms 26 Aug 2024 622nd lgrandco 883 70 18ms 9 Oct 2024 622nd snydej 883 70 20ms 21 Nov 2024 622nd erikji 883 70 20ms 4 Feb 2025 622nd CutSandstone 883 70 20ms 4 Feb 2025 622nd albanian-laundromat 883 70 18ms 12 Apr 2025 622nd xsot 🇸🇬 883 70 23ms 3 May 2025 622nd fuzzylojik-golf 🇺🇸 883 70 20ms 14 Jun 2025 622nd smilesformiles3 883 70 21ms 14 Jun 2025 622nd KasperKivimaeki 🇫🇮 883 70 20ms 30 Jun 2025 622nd adaGrad1 883 70 19ms 10 Aug 2025 622nd EthanJantz 883 70 19ms 10 Aug 2025 622nd qpwoeirut 883 70 16ms 10 Aug 2025 622nd katss2 883 70 19ms 17 Aug 2025 622nd intgrah 883 70 20ms 23 Sep 2025 622nd ryyyn 🇺🇸 883 70 19ms 29 Oct 2025 622nd luuumine 🇫🇷 883 70 19ms 3 Nov 2025 622nd Babafaba 883 70 20ms 7 Nov 2025 622nd commandz0 🇺🇸 883 70 19ms 16 Nov 2025 622nd hellopir2 883 70 22ms 23 Nov 2025 622nd bzijlema 🇳🇱 883 70 20ms 3 Dec 2025 622nd blaztoma 🇱🇹 883 70 21ms 5 days ago 697th Shanethegamer 🇺🇸 882 51 511ms 15 May 2023 698th GrayJoKing 🇦🇺 882 60 136ms 24 Oct 2024 699th GrayJoKing 🇦🇺 882 84 35ms 19 Jun 2022 699th primo-ppcg 🇹🇭 882 84 36ms 29 Jun 2022 699th MeWhenI 🇻🇦 882 84 38ms 30 Dec 2025 702nd primo-ppcg 🇹🇭 882 193 107ms 14 Aug 2025 703rd Shanethegamer 🇺🇸 881 73 116ms 8 May 2025 703rd DialFrost 🇸🇬 881 73 90ms 3 Jun 2025 703rd edsrzf 🇳🇿 881 73 105ms 4 Jul 2025 706th Shanethegamer 🇺🇸 881 142 1,428ms 27 Mar 2025 706th DialFrost 🇸🇬 881 142 1,412ms 28 Mar 2025 706th emgordon154 881 142 2,009ms 10 Apr 2025 706th GolfingSuccess 🇬🇷 881 142 1,464ms 6 Dec 2025 710th JayXon 🇺🇸 881 158 1,772ms 14 Sep 2025 711th dokutan 880 62 5ms 28 Apr 2025 712th johnnythedoggie 880 72 87ms 13 May 2022 712th kaascevich 880 72 90ms 8 Jul 2025 714th DialFrost 🇸🇬 878 56 1,180ms 1 Sep 2025 714th GolfingSuccess 🇬🇷 878 56 905ms 4 days ago 716th Shanethegamer 🇺🇸 878 66 172ms 4 May 2022 716th scpchicken 🇵🇼 878 66 254ms 5 May 2022 716th sisyphus-ppcg 🇦🇺 878 66 173ms 6 May 2022 716th Natanaelel 🇸🇪 878 66 144ms 15 Jun 2022 716th Z-snails 878 66 254ms 27 Feb 2023 First Prev 641–720 of 3,595 Next Last