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 300th Lydxn 🇨🇦 918 79 585ms 9 Apr 2023 302nd primo-ppcg 🇹🇭 917 61 6ms 6 May 2022 302nd sisyphus-ppcg 🇦🇺 917 61 9ms 14 Jul 2022 304th Steffan153 🇫🇮 917 71 108ms 14 Oct 2022 304th Shanethegamer 🇺🇸 917 71 111ms 15 Oct 2022 304th stefangimmillaro 917 71 103ms 16 Oct 2022 304th MeWhenI 🇻🇦 917 71 102ms 16 Oct 2022 304th Steffan153 🇫🇮 917 71 6ms 10 Dec 2022 304th synt7x 🇺🇸 917 71 4ms 7 Jul 2025 310th annaproxy 917 79 128ms 24 Aug 2022 310th GrayJoKing 🇦🇺 917 79 89ms 28 Aug 2022 310th IanUtley 917 79 119ms 3 Nov 2023 310th Kacarott 🇦🇺 917 79 135ms 13 Jun 2024 314th Steffan153 🇫🇮 917 81 26ms 11 Dec 2023 315th arctouch-cristiannevianna 916 85 321ms 3 Apr 2023 315th tomtheisen 🇺🇸 916 85 344ms 10 Apr 2025 317th Shanethegamer 🇺🇸 916 87 390ms 15 May 2023 317th JayXon 🇺🇸 916 87 508ms 15 May 2023 317th Steffan153 🇫🇮 916 87 389ms 16 May 2023 317th Lydxn 🇨🇦 916 87 465ms 16 May 2023 317th GrayJoKing 🇦🇺 916 87 400ms 11 Aug 2023 317th sean-niemann 🇺🇸 916 87 458ms 11 Jul 2024 323rd kmathis22 916 91 354ms 3 days ago 324th Natanaelel 🇸🇪 915 57 474ms 17 Jan 2024 324th Kacarott 🇦🇺 915 57 425ms 10 Sep 2024 326th Shanethegamer 🇺🇸 915 61 3ms 9 Oct 2023 326th edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 328th ovs-code 🇩🇪 915 75 74ms 12 Sep 2024 328th Kacarott 🇦🇺 915 75 78ms 13 Sep 2024 330th Lydxn 🇨🇦 914 81 45ms 1 Apr 2023 331st andersk 🇺🇸 914 91 120ms 25 Oct 2022 331st Super-Pizza 🇨🇦 914 91 127ms 4 Dec 2022 331st klixel 🇨🇦 914 91 121ms 20 May 2023 331st lynn 914 91 127ms 6 Jul 2024 331st edsrzf 🇳🇿 914 91 124ms 29 Nov 2024 331st DialFrost 🇸🇬 914 91 122ms 7 Apr 2025 337th lynn 913 78 1,328ms 5 May 2022 338th tailorspy 912 93 53ms 27 May 2024 338th sean-niemann 🇺🇸 912 93 77ms 9 Jun 2025 338th KasperKivimaeki 🇫🇮 912 93 57ms 26 Oct 2025 341st nai62 911 69 7ms 27 Aug 2022 342nd GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 343rd GolfingSuccess 🇬🇷 910 64 86ms 14 Dec 2024 343rd MeWhenI 🇻🇦 910 64 92ms 24 Dec 2024 345th Shanethegamer 🇺🇸 910 77 12ms 15 May 2023 346th primo-ppcg 🇹🇭 910 93 42ms 7 May 2022 346th AlephSquirrel 910 93 30ms 21 Jan 2023 346th kg583 🇺🇸 910 93 29ms 26 Dec 2024 346th CLOStrophobic 🇮🇹 910 93 31ms 17 Jan 2025 346th edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 351st MeWhenI 🇻🇦 909 63 206ms 5 May 2022 352nd Lydxn 🇨🇦 909 68 437ms 5 May 2022 352nd GrayJoKing 🇦🇺 909 68 15ms 15 Nov 2022 352nd Bubbler-4 909 68 15ms 15 Nov 2022 352nd Rubiksmath 909 68 15ms 14 Aug 2023 356th edsrzf 🇳🇿 909 72 127ms 3 Jul 2025 357th marshallward 🇺🇸 909 83 46ms 10 May 2022 358th ovs-code 🇩🇪 909 84 65ms 25 Sep 2022 358th GrayJoKing 🇦🇺 909 84 65ms 11 Aug 2023 358th edsrzf 🇳🇿 909 84 80ms 11 days ago 361st Betuaredead 908 60 6ms 5 Jan 2023 361st Yewzir 🇧🇪 908 60 5ms 12 Feb 2023 361st Steffan153 🇫🇮 908 60 5ms 23 Feb 2023 361st DialFrost 🇸🇬 908 60 5ms 30 Jul 2024 361st GolfingSuccess 🇬🇷 908 60 5ms 16 Oct 2024 361st sean-niemann 🇺🇸 908 60 12ms 7 Mar 2025 367th DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 368th edsrzf 🇳🇿 908 83 41ms 14 Jan 2025 368th kg583 🇺🇸 908 83 39ms 14 Feb 2025 370th m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 371st KrausRaus 🇺🇸 907 59 10ms 4 May 2022 371st voytxt 🇨🇿 907 59 10ms 4 May 2022 371st KingSkyrock 🇺🇸 907 59 10ms 18 May 2022 371st ZakkkkAttackkkk 🇵🇭 907 59 13ms 14 Jul 2022 371st aksyristos 907 59 11ms 28 Oct 2022 First Prev 301–375 of 3,484 Next Last