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 ><> 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 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 ><> 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 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 618th QuincyNash 🇺🇸 883 70 20ms 29 Nov 2022 618th aksyristos 883 70 20ms 25 Dec 2022 618th thizanne 883 70 20ms 27 Dec 2022 618th Alex-x90 🇺🇸 883 70 20ms 20 Jan 2023 618th bob-th 883 70 21ms 24 Jan 2023 618th SirFireball3521 883 70 18ms 25 Jan 2023 618th stefangimmillaro 883 70 21ms 6 Feb 2023 618th FieryIceStickie 883 70 18ms 3 Apr 2023 618th MeWhenI 🇻🇦 883 70 19ms 30 Apr 2023 618th fgrosshans 🇫🇷 883 70 18ms 5 May 2023 618th Shanethegamer 🇺🇸 883 70 20ms 25 May 2023 618th InigoK 🇺🇸 883 70 20ms 14 Jun 2023 618th quimey 883 70 18ms 15 Jun 2023 618th CornerMercury 🇬🇧 883 70 20ms 19 Jun 2023 618th ndren 883 70 19ms 2 Aug 2023 618th janbehrens 🇩🇪 883 70 21ms 24 Nov 2023 618th namelessiw 883 70 19ms 9 Jan 2024 618th mathisfun271 883 70 20ms 13 Feb 2024 618th Just4FunCoder 883 70 20ms 17 Feb 2024 618th ThijsLuttikhuis 883 70 20ms 3 Mar 2024 618th elgan65536 🇺🇸 883 70 19ms 5 Mar 2024 618th jtaxen 883 70 21ms 1 Apr 2024 618th HumanoidCPU 883 70 19ms 6 May 2024 618th abc7-12 883 70 22ms 6 May 2024 618th ahmetdemirag 🇨🇾 883 70 20ms 9 Jun 2024 618th FranklinJiaChen 883 70 20ms 4 Jul 2024 618th 5cw 🇺🇸 883 70 21ms 13 Jul 2024 618th CaedenHarper 🇨🇦 883 70 21ms 3 Aug 2024 618th emgordon154 883 70 23ms 5 Aug 2024 618th dokutan 883 70 20ms 9 Aug 2024 618th jatloe 883 70 20ms 26 Aug 2024 618th lgrandco 883 70 18ms 9 Oct 2024 618th snydej 883 70 20ms 21 Nov 2024 618th erikji 883 70 20ms 4 Feb 2025 618th CutSandstone 883 70 20ms 4 Feb 2025 618th albanian-laundromat 883 70 18ms 12 Apr 2025 618th xsot 🇸🇬 883 70 25ms 3 May 2025 618th fuzzylojik-golf 🇺🇸 883 70 21ms 14 Jun 2025 618th smilesformiles3 883 70 21ms 14 Jun 2025 618th KasperKivimaeki 🇫🇮 883 70 20ms 30 Jun 2025 618th adaGrad1 883 70 20ms 10 Aug 2025 618th EthanJantz 883 70 19ms 10 Aug 2025 618th qpwoeirut 883 70 16ms 10 Aug 2025 618th katss2 883 70 19ms 17 Aug 2025 618th intgrah 883 70 20ms 23 Sep 2025 618th ryyyn 🇺🇸 883 70 21ms 29 Oct 2025 618th luuumine 🇫🇷 883 70 20ms 3 Nov 2025 618th Babafaba 883 70 20ms 7 Nov 2025 618th commandz0 🇺🇸 883 70 25ms 16 Nov 2025 618th hellopir2 883 70 27ms 23 Nov 2025 618th bzijlema 🇳🇱 883 70 20ms 3 Dec 2025 692nd Shanethegamer 🇺🇸 882 51 511ms 15 May 2023 693rd GrayJoKing 🇦🇺 882 60 136ms 24 Oct 2024 694th GrayJoKing 🇦🇺 882 84 37ms 19 Jun 2022 694th primo-ppcg 🇹🇭 882 84 36ms 29 Jun 2022 694th MeWhenI 🇻🇦 882 84 38ms 30 Dec 2025 697th Shanethegamer 🇺🇸 881 73 116ms 8 May 2025 697th DialFrost 🇸🇬 881 73 90ms 3 Jun 2025 697th edsrzf 🇳🇿 881 73 105ms 4 Jul 2025 700th Shanethegamer 🇺🇸 881 142 1,396ms 27 Mar 2025 700th DialFrost 🇸🇬 881 142 1,477ms 28 Mar 2025 700th emgordon154 881 142 1,573ms 10 Apr 2025 700th GolfingSuccess 🇬🇷 881 142 1,450ms 6 Dec 2025 704th JayXon 🇺🇸 881 158 1,772ms 14 Sep 2025 705th primo-ppcg 🇹🇭 881 193 107ms 14 Aug 2025 706th dokutan 880 62 5ms 28 Apr 2025 707th johnnythedoggie 880 72 87ms 13 May 2022 707th kaascevich 880 72 90ms 8 Jul 2025 709th Shanethegamer 🇺🇸 878 66 172ms 4 May 2022 709th scpchicken 🇵🇼 878 66 254ms 5 May 2022 709th sisyphus-ppcg 🇦🇺 878 66 174ms 6 May 2022 709th Natanaelel 🇸🇪 878 66 144ms 15 Jun 2022 709th Z-snails 878 66 254ms 27 Feb 2023 709th Jeremy-Stafford 878 66 258ms 27 Feb 2023 709th alomiF 878 66 293ms 1 Sep 2023 709th btnlq 878 66 145ms 17 Oct 2023 717th DialFrost 🇸🇬 878 86 40ms 24 Oct 2024 717th stefangimmillaro 878 86 39ms 14 Jan 2025 719th emgordon154 878 97 104ms 3 Dec 2025 720th c0d3-4-F00d 🇩🇪 877 61 11ms 6 May 2022 First Prev 641–720 of 3,574 Next Last