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 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 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 300th Shanethegamer 🇺🇸 917 71 106ms 15 Oct 2022 300th stefangimmillaro 917 71 106ms 16 Oct 2022 300th MeWhenI 🇻🇦 917 71 105ms 16 Oct 2022 300th Steffan153 🇫🇮 917 71 6ms 10 Dec 2022 300th synt7x 🇺🇸 917 71 4ms 7 Jul 2025 306th annaproxy 917 79 128ms 24 Aug 2022 306th GrayJoKing 🇦🇺 917 79 89ms 28 Aug 2022 306th JayXon 🇺🇸 917 79 869ms 5 Apr 2023 306th Lydxn 🇨🇦 917 79 858ms 9 Apr 2023 306th IanUtley 917 79 119ms 3 Nov 2023 306th Kacarott 🇦🇺 917 79 135ms 13 Jun 2024 312th Steffan153 🇫🇮 917 81 26ms 11 Dec 2023 313th arctouch-cristiannevianna 916 85 366ms 3 Apr 2023 313th tomtheisen 🇺🇸 916 85 340ms 10 Apr 2025 315th Shanethegamer 🇺🇸 916 87 390ms 15 May 2023 315th JayXon 🇺🇸 916 87 508ms 15 May 2023 315th Steffan153 🇫🇮 916 87 389ms 16 May 2023 315th Lydxn 🇨🇦 916 87 465ms 16 May 2023 315th GrayJoKing 🇦🇺 916 87 400ms 11 Aug 2023 315th sean-niemann 🇺🇸 916 87 458ms 11 Jul 2024 321st Natanaelel 🇸🇪 915 57 474ms 17 Jan 2024 321st Kacarott 🇦🇺 915 57 425ms 10 Sep 2024 323rd Shanethegamer 🇺🇸 915 61 4ms 9 Oct 2023 323rd edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 325th ovs-code 🇩🇪 915 75 74ms 12 Sep 2024 325th Kacarott 🇦🇺 915 75 78ms 13 Sep 2024 327th Lydxn 🇨🇦 914 81 45ms 1 Apr 2023 328th lynn 913 78 1,358ms 5 May 2022 329th andersk 🇺🇸 913 91 120ms 25 Oct 2022 329th Super-Pizza 🇨🇦 913 91 127ms 4 Dec 2022 329th klixel 🇨🇦 913 91 121ms 20 May 2023 329th lynn 913 91 140ms 6 Jul 2024 329th edsrzf 🇳🇿 913 91 124ms 29 Nov 2024 329th DialFrost 🇸🇬 913 91 123ms 7 Apr 2025 335th tailorspy 912 93 53ms 27 May 2024 335th sean-niemann 🇺🇸 912 93 54ms 9 Jun 2025 335th KasperKivimaeki 🇫🇮 912 93 54ms 20 days ago 338th nai62 911 69 7ms 27 Aug 2022 339th GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 340th GolfingSuccess 🇬🇷 910 64 86ms 14 Dec 2024 340th MeWhenI 🇻🇦 910 64 92ms 24 Dec 2024 342nd Shanethegamer 🇺🇸 910 77 15ms 15 May 2023 343rd primo-ppcg 🇹🇭 910 93 42ms 7 May 2022 343rd AlephSquirrel 910 93 30ms 21 Jan 2023 343rd kg583 🇺🇸 910 93 29ms 26 Dec 2024 343rd CLOStrophobic 🇮🇹 910 93 31ms 17 Jan 2025 343rd edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 348th MeWhenI 🇻🇦 909 63 238ms 5 May 2022 349th Lydxn 🇨🇦 909 68 501ms 5 May 2022 349th GrayJoKing 🇦🇺 909 68 15ms 15 Nov 2022 349th Bubbler-4 909 68 16ms 15 Nov 2022 349th JayXon 🇺🇸 909 68 15ms 7 Mar 2023 349th Rubiksmath 909 68 15ms 14 Aug 2023 354th edsrzf 🇳🇿 909 72 129ms 3 Jul 2025 355th marshallward 🇺🇸 909 83 46ms 10 May 2022 356th ovs-code 🇩🇪 909 84 66ms 25 Sep 2022 356th GrayJoKing 🇦🇺 909 84 65ms 11 Aug 2023 356th edsrzf 🇳🇿 909 84 80ms 4 days ago 359th Betuaredead 908 60 6ms 5 Jan 2023 359th Yewzir 🇧🇪 908 60 5ms 12 Feb 2023 359th Steffan153 🇫🇮 908 60 5ms 23 Feb 2023 359th DialFrost 🇸🇬 908 60 5ms 30 Jul 2024 359th GolfingSuccess 🇬🇷 908 60 5ms 16 Oct 2024 359th sean-niemann 🇺🇸 908 60 12ms 7 Mar 2025 365th DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 366th m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 367th KrausRaus 🇺🇸 907 59 13ms 4 May 2022 367th voytxt 🇨🇿 907 59 10ms 4 May 2022 367th KingSkyrock 🇺🇸 907 59 10ms 18 May 2022 367th ZakkkkAttackkkk 🇵🇭 907 59 10ms 14 Jul 2022 367th aksyristos 907 59 10ms 28 Oct 2022 367th nstearns96 🇬🇧 907 59 10ms 28 Nov 2022 367th janbehrens 🇩🇪 907 59 10ms 17 May 2023 367th Shanethegamer 🇺🇸 907 59 11ms 25 May 2023 367th Maznek 907 59 10ms 26 Jun 2023 First Prev 301–375 of 3,467 Next Last