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 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 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 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 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 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 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 Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 376th ovs-code 🇩🇪 924 67 13 Dec 2022 376th Steffan153 🇫🇮 924 67 18 Dec 2022 376th Lydxn 🇨🇦 924 67 4 Feb 2023 376th sean-niemann 🇺🇸 924 67 7 Mar 2025 380th Luca2812 924 127 12 Dec 2022 380th h3ra993huskp 🇯🇵 924 127 17 Sep 2023 380th tigerdan2 🇩🇪 924 127 19 Dec 2023 380th Apataras 924 127 16 Jul 2025 384th Bubbler-4 923 33 6 May 2022 384th rak1507 🇬🇧 923 33 8 May 2022 384th ngn 🇧🇬 923 33 11 May 2022 384th zacjl 923 33 3 Jun 2025 384th GrayJoKing 🇦🇺 923 33 4 Jun 2025 389th Lydxn 🇨🇦 923 90 6 May 2022 389th kumavale 923 90 6 hours ago 391st nwellnhof 🇩🇪 922 51 4 May 2022 391st primo-ppcg 🇹🇭 922 51 6 May 2022 391st janlelis 922 51 10 May 2022 391st Natanaelel 🇸🇪 922 51 2 Jun 2022 395th uiamn 922 58 6 Sep 2022 395th 5quiwyrm 922 58 29 Sep 2022 395th alasdair-greenland 922 58 13 Jan 2023 395th kirjavascript 922 58 4 Aug 2025 395th Posandu 922 58 8 days ago 395th mrxz 🇳🇱 922 58 6 hours ago 401st btnlq 922 59 6 Nov 2022 402nd Lydxn 🇨🇦 922 108 6 May 2022 402nd JayXon 🇺🇸 922 108 9 May 2022 404th MichalMarsalek 🇨🇿 921 71 5 May 2022 404th Lydxn 🇨🇦 921 71 7 May 2022 404th GrayJoKing 🇦🇺 921 71 8 May 2022 404th JayXon 🇺🇸 921 71 8 May 2022 404th Steffan153 🇫🇮 921 71 9 Mar 2023 404th Shanethegamer 🇺🇸 921 71 15 May 2023 404th MeWhenI 🇻🇦 921 71 8 Aug 2023 404th sean-niemann 🇺🇸 921 71 9 Jan 2025 412th Herbert00709 🇵🇱 921 92 17 Nov 2023 412th 4QT0R 921 92 23 Nov 2023 412th ovs-code 🇩🇪 921 92 3 Jun 2024 415th xnor-gate 919 63 20 Jan 2025 416th Steffan153 🇫🇮 919 76 15 May 2023 416th primo-ppcg 🇹🇭 919 76 15 May 2023 416th Lydxn 🇨🇦 919 76 22 May 2023 416th GrayJoKing 🇦🇺 919 76 24 Aug 2023 420th sean-niemann 🇺🇸 918 55 5 days ago 420th edsrzf 🇳🇿 918 55 37 hours ago 422nd primo-ppcg 🇹🇭 917 61 6 May 2022 422nd sisyphus-ppcg 🇦🇺 917 61 14 Jul 2022 424th Lydxn 🇨🇦 917 70 7 May 2022 424th JayXon 🇺🇸 917 70 7 May 2022 426th Steffan153 🇫🇮 916 71 14 Oct 2022 426th Shanethegamer 🇺🇸 916 71 15 Oct 2022 426th stefangimmillaro 916 71 16 Oct 2022 426th MeWhenI 🇻🇦 916 71 16 Oct 2022 426th Steffan153 🇫🇮 916 71 10 Dec 2022 426th synt7x 🇺🇸 916 71 7 Jul 2025 432nd annaproxy 916 79 24 Aug 2022 432nd GrayJoKing 🇦🇺 916 79 28 Aug 2022 432nd IanUtley 916 79 3 Nov 2023 432nd Kacarott 🇦🇺 916 79 13 Jun 2024 436th arctouch-cristiannevianna 916 85 3 Apr 2023 436th tomtheisen 🇺🇸 916 85 10 Apr 2025 438th Natanaelel 🇸🇪 914 57 17 Jan 2024 438th Kacarott 🇦🇺 914 57 10 Sep 2024 440th Shanethegamer 🇺🇸 914 61 9 Oct 2023 440th edsrzf 🇳🇿 914 61 4 Jul 2025 442nd JayXon 🇺🇸 914 79 5 Apr 2023 442nd Lydxn 🇨🇦 914 79 9 Apr 2023 444th Steffan153 🇫🇮 914 81 11 Dec 2023 445th Shanethegamer 🇺🇸 914 87 15 May 2023 445th JayXon 🇺🇸 914 87 15 May 2023 445th Steffan153 🇫🇮 914 87 16 May 2023 445th Lydxn 🇨🇦 914 87 16 May 2023 445th GrayJoKing 🇦🇺 914 87 11 Aug 2023 445th sean-niemann 🇺🇸 914 87 11 Jul 2024 Prev 376–450 of 3,295 Next