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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 373rd zacjl 923 33 3 Jun 2025 373rd GrayJoKing 🇦🇺 923 33 4 Jun 2025 378th Lydxn 🇨🇦 923 90 6 May 2022 379th Luca2812 923 127 12 Dec 2022 379th plastic-bottle 923 127 13 Sep 2023 379th h3ra993huskp 🇯🇵 923 127 17 Sep 2023 379th tigerdan2 🇩🇪 923 127 19 Dec 2023 379th Apataras 923 127 16 Jul 2025 384th nwellnhof 🇩🇪 922 51 4 May 2022 384th primo-ppcg 🇹🇭 922 51 6 May 2022 384th radarek 🇵🇱 922 51 8 May 2022 384th janlelis 922 51 10 May 2022 384th Natanaelel 🇸🇪 922 51 2 Jun 2022 389th uiamn 922 58 6 Sep 2022 389th 5quiwyrm 922 58 29 Sep 2022 389th alasdair-greenland 922 58 13 Jan 2023 389th kirjavascript 922 58 12 days ago 393rd btnlq 922 59 6 Nov 2022 394th Lydxn 🇨🇦 922 108 6 May 2022 394th JayXon 🇺🇸 922 108 9 May 2022 396th MichalMarsalek 🇨🇿 921 71 5 May 2022 396th Lydxn 🇨🇦 921 71 7 May 2022 396th GrayJoKing 🇦🇺 921 71 8 May 2022 396th JayXon 🇺🇸 921 71 8 May 2022 396th Steffan153 🇫🇮 921 71 9 Mar 2023 396th Shanethegamer 🇺🇸 921 71 15 May 2023 396th MeWhenI 🇻🇦 921 71 8 Aug 2023 396th sean-niemann 🇺🇸 921 71 9 Jan 2025 404th Herbert00709 🇵🇱 921 92 17 Nov 2023 404th 4QT0R 921 92 23 Nov 2023 404th ovs-code 🇩🇪 921 92 3 Jun 2024 407th xnor-gate 919 63 20 Jan 2025 408th Steffan153 🇫🇮 919 76 15 May 2023 408th primo-ppcg 🇹🇭 919 76 15 May 2023 408th Lydxn 🇨🇦 919 76 22 May 2023 408th GrayJoKing 🇦🇺 919 76 24 Aug 2023 412th primo-ppcg 🇹🇭 917 61 6 May 2022 412th sisyphus-ppcg 🇦🇺 917 61 14 Jul 2022 414th Lydxn 🇨🇦 917 70 7 May 2022 414th JayXon 🇺🇸 917 70 7 May 2022 416th Steffan153 🇫🇮 916 71 14 Oct 2022 416th Shanethegamer 🇺🇸 916 71 15 Oct 2022 416th stefangimmillaro 916 71 16 Oct 2022 416th MeWhenI 🇻🇦 916 71 16 Oct 2022 416th Steffan153 🇫🇮 916 71 10 Dec 2022 416th synt7x 🇺🇸 916 71 7 Jul 2025 422nd annaproxy 916 79 24 Aug 2022 422nd GrayJoKing 🇦🇺 916 79 28 Aug 2022 422nd IanUtley 916 79 3 Nov 2023 422nd Kacarott 🇦🇺 916 79 13 Jun 2024 426th arctouch-cristiannevianna 916 85 3 Apr 2023 426th tomtheisen 🇺🇸 916 85 10 Apr 2025 428th Natanaelel 🇸🇪 914 57 17 Jan 2024 428th Kacarott 🇦🇺 914 57 10 Sep 2024 430th Shanethegamer 🇺🇸 914 61 9 Oct 2023 430th edsrzf 🇳🇿 914 61 4 Jul 2025 432nd JayXon 🇺🇸 914 79 5 Apr 2023 432nd Lydxn 🇨🇦 914 79 9 Apr 2023 434th Steffan153 🇫🇮 914 81 11 Dec 2023 435th Shanethegamer 🇺🇸 914 87 15 May 2023 435th JayXon 🇺🇸 914 87 15 May 2023 435th Steffan153 🇫🇮 914 87 16 May 2023 435th Lydxn 🇨🇦 914 87 16 May 2023 435th GrayJoKing 🇦🇺 914 87 11 Aug 2023 435th sean-niemann 🇺🇸 914 87 11 Jul 2024 441st sean-niemann 🇺🇸 914 109 25 May 2024 441st CaedenHarper 🇨🇦 914 109 28 Jan 2025 443rd pardouin 🇫🇷 913 72 21 May 2025 444th AdamHe17 913 73 31 May 2022 444th AliceFord 913 73 2 Jun 2022 444th Natanaelel 🇸🇪 913 73 16 Jun 2022 444th btjones0 913 73 21 Jun 2022 444th marcin7Cd 913 73 27 Jun 2022 444th tri1212 🇻🇳 913 73 18 Jul 2022 444th vhoulbreque 🇫🇷 913 73 18 Aug 2022 Prev 376–450 of 3,268 Next