Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 Morse Decoder Morse Encoder 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 Morse Decoder Morse Encoder 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 526th Shanethegamer 🇺🇸 909 77 13ms 15 May 2023 527th marshallward 🇺🇸 909 83 46ms 10 May 2022 528th primo-ppcg 🇹🇭 909 93 42ms 7 May 2022 528th AlephSquirrel 909 93 30ms 21 Jan 2023 528th kg583 🇺🇸 909 93 32ms 26 Dec 2024 528th CLOStrophobic 🇮🇹 909 93 31ms 17 Jan 2025 528th edsrzf 🇳🇿 909 93 35ms 3 Jul 2025 533rd edsrzf 🇳🇿 908 72 150ms 3 Jul 2025 534th DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 535th ovs-code 🇩🇪 908 84 72ms 25 Sep 2022 535th GrayJoKing 🇦🇺 908 84 95ms 11 Aug 2023 537th m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 538th KrausRaus 🇺🇸 907 59 11ms 4 May 2022 538th voytxt 🇨🇿 907 59 15ms 4 May 2022 538th KingSkyrock 🇺🇸 907 59 11ms 18 May 2022 538th ZakkkkAttackkkk 🇵🇭 907 59 10ms 14 Jul 2022 538th aksyristos 907 59 10ms 28 Oct 2022 538th nstearns96 🇬🇧 907 59 11ms 28 Nov 2022 538th janbehrens 🇩🇪 907 59 13ms 17 May 2023 538th Shanethegamer 🇺🇸 907 59 11ms 25 May 2023 538th Maznek 907 59 10ms 26 Jun 2023 538th SpiritAxolotl 🇺🇸 907 59 14ms 20 Mar 2024 538th Andrey-Plotnikov 907 59 10ms 19 May 2024 538th emgordon154 907 59 11ms 5 Aug 2024 538th duckyluuk 🇳🇱 907 59 9ms 3 Oct 2024 538th lifthrasiir 🇰🇷 907 59 11ms 23 Nov 2024 538th fuzzylojik-golf 🇺🇸 907 59 13ms 1 Jun 2025 538th acollett89 907 59 11ms 17 Jun 2025 538th iczelia 🇩🇪 907 59 12ms 23 Sep 2025 555th Betuaredead 907 60 6ms 5 Jan 2023 555th Yewzir 🇧🇪 907 60 5ms 12 Feb 2023 555th Steffan153 🇫🇮 907 60 5ms 23 Feb 2023 555th DialFrost 🇸🇬 907 60 5ms 30 Jul 2024 555th GolfingSuccess 🇬🇷 907 60 5ms 16 Oct 2024 555th sean-niemann 🇺🇸 907 60 12ms 7 Mar 2025 561st nipzu 906 48 54ms 8 Sep 2024 562nd albanian-laundromat 906 55 973ms 22 Sep 2025 563rd Steffan153 🇫🇮 906 80 40ms 15 Nov 2022 563rd error256 906 80 130ms 8 Apr 2025 565th krcs 🇵🇱 906 86 325ms 10 May 2022 565th billings7 🇬🇧 906 86 411ms 15 May 2022 565th revlayle 🇺🇸 906 86 353ms 7 Dec 2022 565th Widgitty 906 86 356ms 1 Sep 2023 565th albanian-laundromat 906 86 319ms 22 days ago 570th shinh 905 52 42ms 29 Jun 2022 571st Lydxn 🇨🇦 905 64 199ms 1 Apr 2023 572nd Lydxn 🇨🇦 905 70 105ms 7 May 2022 573rd MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 574th Shanethegamer 🇺🇸 905 82 19ms 19 Dec 2023 574th edsrzf 🇳🇿 905 82 19ms 6 Jan 2025 576th Shanethegamer 🇺🇸 904 72 4ms 4 May 2022 576th jared-hughes 904 72 4ms 4 May 2022 576th Waffle3z 904 72 7ms 5 May 2022 576th m-tkach 🇺🇦 904 72 130ms 16 Oct 2022 576th GrayJoKing 🇦🇺 904 72 115ms 22 Oct 2022 576th emplv 🇱🇻 904 72 107ms 27 Oct 2022 576th sean-niemann 🇺🇸 904 72 112ms 7 Mar 2025 576th Blendi-Goose 904 72 6ms 16 Mar 2025 576th edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 576th sean-niemann 🇺🇸 904 72 6ms 6 days ago 586th edsrzf 🇳🇿 904 83 42ms 14 Jan 2025 586th kg583 🇺🇸 904 83 44ms 14 Feb 2025 588th Steffan153 🇫🇮 903 82 44ms 1 Apr 2023 588th sean-niemann 🇺🇸 903 82 43ms 12 Jul 2024 590th stefangimmillaro 903 92 123ms 24 Oct 2023 590th inverseLorentz 🇦🇺 903 92 167ms 27 May 2024 590th sean-niemann 🇺🇸 903 92 131ms 8 Jun 2025 593rd Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 593rd GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 593rd btnlq 902 69 7ms 24 Sep 2022 596th michael-pruglo 🇺🇦 902 94 61ms 5 Jul 2022 596th zygoloid 902 94 66ms 5 Aug 2024 598th TobyBoyne 🇬🇧 901 74 28ms 4 May 2022 598th RDShah 901 74 22ms 6 May 2022 598th Indivicivet 901 74 20ms 9 May 2022 First Prev 526–600 of 3,408 Next Last