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 373rd sean-niemann 🇺🇸 925 67 7 Mar 2025 377th Bubbler-4 923 33 6 May 2022 377th rak1507 🇬🇧 923 33 8 May 2022 377th ngn 🇧🇬 923 33 11 May 2022 377th zacjl 923 33 3 Jun 2025 377th GrayJoKing 🇦🇺 923 33 4 Jun 2025 382nd btnlq 923 59 6 Nov 2022 383rd Lydxn 🇨🇦 923 90 6 May 2022 383rd kumavale 923 90 3 Sep 2025 385th nwellnhof 🇩🇪 922 51 4 May 2022 385th primo-ppcg 🇹🇭 922 51 6 May 2022 385th janlelis 922 51 10 May 2022 385th Natanaelel 🇸🇪 922 51 2 Jun 2022 389th edsrzf 🇳🇿 922 54 23 days ago 389th CaedenHarper 🇨🇦 922 54 9 days ago 389th sean-niemann 🇺🇸 922 54 8 days ago 392nd uiamn 922 58 6 Sep 2022 392nd 5quiwyrm 922 58 29 Sep 2022 392nd alasdair-greenland 922 58 13 Jan 2023 392nd kirjavascript 922 58 4 Aug 2025 392nd Posandu 922 58 26 Aug 2025 392nd mrxz 🇳🇱 922 58 3 Sep 2025 398th MichalMarsalek 🇨🇿 921 71 5 May 2022 398th Lydxn 🇨🇦 921 71 7 May 2022 398th GrayJoKing 🇦🇺 921 71 8 May 2022 398th JayXon 🇺🇸 921 71 8 May 2022 398th Steffan153 🇫🇮 921 71 9 Mar 2023 398th Shanethegamer 🇺🇸 921 71 15 May 2023 398th MeWhenI 🇻🇦 921 71 8 Aug 2023 398th sean-niemann 🇺🇸 921 71 9 Jan 2025 406th Steffan153 🇫🇮 921 76 15 May 2023 406th primo-ppcg 🇹🇭 921 76 15 May 2023 406th Lydxn 🇨🇦 921 76 22 May 2023 406th GrayJoKing 🇦🇺 921 76 24 Aug 2023 410th Herbert00709 🇵🇱 921 92 17 Nov 2023 410th 4QT0R 921 92 23 Nov 2023 410th ovs-code 🇩🇪 921 92 3 Jun 2024 413th xnor-gate 919 63 20 Jan 2025 414th Lydxn 🇨🇦 918 70 7 May 2022 414th JayXon 🇺🇸 918 70 7 May 2022 416th primo-ppcg 🇹🇭 917 61 6 May 2022 416th sisyphus-ppcg 🇦🇺 917 61 14 Jul 2022 418th Steffan153 🇫🇮 917 71 14 Oct 2022 418th Shanethegamer 🇺🇸 917 71 15 Oct 2022 418th stefangimmillaro 917 71 16 Oct 2022 418th MeWhenI 🇻🇦 917 71 16 Oct 2022 422nd pardouin 🇫🇷 917 72 21 May 2025 423rd annaproxy 917 79 24 Aug 2022 423rd GrayJoKing 🇦🇺 917 79 28 Aug 2022 423rd IanUtley 917 79 3 Nov 2023 423rd Kacarott 🇦🇺 917 79 13 Jun 2024 427th Steffan153 🇫🇮 916 71 10 Dec 2022 427th synt7x 🇺🇸 916 71 7 Jul 2025 429th JayXon 🇺🇸 916 79 5 Apr 2023 429th Lydxn 🇨🇦 916 79 9 Apr 2023 431st Steffan153 🇫🇮 916 81 11 Dec 2023 432nd arctouch-cristiannevianna 916 85 3 Apr 2023 432nd tomtheisen 🇺🇸 916 85 10 Apr 2025 434th Shanethegamer 🇺🇸 915 61 9 Oct 2023 434th edsrzf 🇳🇿 915 61 4 Jul 2025 436th Shanethegamer 🇺🇸 915 87 15 May 2023 436th JayXon 🇺🇸 915 87 15 May 2023 436th Steffan153 🇫🇮 915 87 16 May 2023 436th Lydxn 🇨🇦 915 87 16 May 2023 436th GrayJoKing 🇦🇺 915 87 11 Aug 2023 436th sean-niemann 🇺🇸 915 87 11 Jul 2024 442nd CaedenHarper 🇨🇦 915 91 2 days ago 443rd Natanaelel 🇸🇪 914 57 17 Jan 2024 443rd Kacarott 🇦🇺 914 57 10 Sep 2024 445th AdamHe17 913 73 31 May 2022 445th AliceFord 913 73 2 Jun 2022 445th Natanaelel 🇸🇪 913 73 16 Jun 2022 445th btjones0 913 73 21 Jun 2022 445th marcin7Cd 913 73 27 Jun 2022 445th tri1212 🇻🇳 913 73 18 Jul 2022 First Prev 376–450 of 3,382 Next Last