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 Minesweeper 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 Binary Lambda Calculus Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 Minesweeper 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 Binary Lambda Calculus Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 444th lynn 896 69 17ms 22 Aug 2022 444th Steffan153 🇫🇮 896 69 18ms 15 Nov 2022 444th AlexanderFair 896 69 24ms 19 Jul 2023 444th pardouin 🇫🇷 896 69 16ms 11 Nov 2023 444th AlephSquirrel 896 69 14ms 30 Dec 2023 444th kg583 🇺🇸 896 69 16ms 28 Jan 2024 444th davecame 896 69 25ms 20 Aug 2024 444th zacjl 896 69 17ms 19 Sep 2024 444th starfihs 896 69 16ms 12 Oct 2024 444th kops-cg 896 69 22ms 9 Feb 2025 444th sean-niemann 🇺🇸 896 69 17ms 7 Mar 2025 444th plcc0 896 69 15ms 26 Mar 2025 444th yujh-yujh 🇬🇸 896 69 57ms 28 Mar 2025 444th moustave 896 69 17ms 10 Jun 2025 444th 4atj 896 69 3,399ms 30 Jun 2025 444th dirckvdende 896 69 16ms 11 Jul 2025 444th xnor-gate 896 69 26ms 19 Aug 2025 444th BrunoVisnadi 🇧🇷 896 69 16ms 1 Oct 2025 444th Mukundan314 896 69 17ms 8 days ago 444th bizy-coder 896 69 17ms 4 hours ago 471st Ripick 896 73 121ms 8 May 2023 472nd ovs-code 🇩🇪 896 89 457ms 24 Jul 2024 472nd jipsong 🇩🇪 896 89 467ms 7 Apr 2025 474th MichalMarsalek 🇨🇿 895 87 324ms 5 May 2022 474th Kloppermand 🇩🇰 895 87 326ms 7 Oct 2022 474th bwat2 895 87 317ms 6 Apr 2023 477th oeb25 894 93 128ms 16 May 2022 477th snobee 🇨🇦 894 93 130ms 8 Dec 2022 477th logvp 894 93 123ms 2 Jan 2024 477th elgan65536 894 93 124ms 5 Mar 2024 477th smartiel 894 93 120ms 12 Aug 2024 477th trist224 🇫🇷 894 93 126ms 12 Aug 2024 477th nullie 894 93 126ms 19 Dec 2024 477th lolgeny 894 93 126ms 22 Feb 2025 485th Shanethegamer 🇺🇸 893 61 6ms 31 Oct 2022 485th MeWhenI 🇻🇦 893 61 5ms 4 Nov 2022 487th Yewzir 🇧🇪 893 72 92ms 26 hours ago 488th JayXon 🇺🇸 893 74 3,078ms 14 Nov 2024 489th GolfingSuccess 🇬🇷 893 95 54ms 5 May 2022 489th Alex-x90 🇺🇸 893 95 53ms 4 Dec 2022 489th Mandrzejy 🇵🇱 893 95 53ms 22 Mar 2024 492nd m-tkach 🇺🇦 893 117 27ms 7 May 2022 492nd Lydxn 🇨🇦 893 117 28ms 7 May 2022 494th Steffan153 🇫🇮 892 52 7ms 31 Dec 2022 495th DialFrost 🇸🇬 892 56 820ms 1 Sep 2025 496th KatieLG 🇬🇧 892 60 11ms 4 May 2022 496th ScottHamper 892 60 10ms 5 May 2022 496th Re-Adventures 🇮🇳 892 60 10ms 5 May 2022 496th 0x24a537r9 892 60 10ms 29 Jul 2022 496th stefangabos 🇷🇴 892 60 10ms 19 Aug 2022 496th eranws 892 60 11ms 10 Sep 2022 496th GeorgeStechman 🇬🇧 892 60 11ms 26 Sep 2022 496th BloodStormKnight 892 60 10ms 15 Oct 2022 496th dzshn 892 60 14ms 3 Dec 2022 496th biocommando 🇫🇮 892 60 10ms 20 Dec 2022 496th Betuaredead 892 60 10ms 5 Jan 2023 496th piano-miles 892 60 10ms 16 Jan 2023 496th Yewzir 🇧🇪 892 60 13ms 12 Feb 2023 496th shellbertt 🇨🇦 892 60 10ms 26 Feb 2023 496th zakariamouhid 892 60 10ms 20 May 2023 496th raphaelimahorn 892 60 10ms 23 Aug 2023 496th jbt 892 60 13ms 25 Dec 2023 496th olleicua 🇺🇸 892 60 10ms 15 Feb 2024 496th HumanoidCPU 892 60 12ms 3 May 2024 496th dokutan 892 60 10ms 13 Aug 2024 496th LostSyntax21 🇬🇧 892 60 10ms 10 Sep 2024 496th xyangst 892 60 10ms 28 Sep 2024 496th a6166231 🇨🇳 892 60 9ms 15 May 2025 496th Protothor 892 60 11ms 8 Jul 2025 496th SebassNoob 892 60 10ms 5 Aug 2025 496th Yax42 🇫🇷 892 60 10ms 5 Sep 2025 496th levinwinter 892 60 12ms 22 Oct 2025 496th Cube14yt 892 60 12ms 5 days ago 496th gigaprofisi 🇺🇸 892 60 12ms 4 days ago 525th stefangimmillaro 892 71 89ms 2 Oct 2022 First Prev 451–525 of 3,480 Next Last