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 375th KasperKivimaeki 🇫🇮 926 105 17 days ago 377th ovs-code 🇩🇪 925 67 13 Dec 2022 377th Steffan153 🇫🇮 925 67 18 Dec 2022 377th Lydxn 🇨🇦 925 67 4 Feb 2023 377th sean-niemann 🇺🇸 925 67 7 Mar 2025 381st Bubbler-4 923 33 6 May 2022 381st rak1507 🇬🇧 923 33 8 May 2022 381st ngn 🇧🇬 923 33 11 May 2022 381st zacjl 923 33 3 Jun 2025 381st GrayJoKing 🇦🇺 923 33 4 Jun 2025 386th edsrzf 🇳🇿 923 54 13 Sep 2025 386th CaedenHarper 🇨🇦 923 54 23 days ago 386th sean-niemann 🇺🇸 923 54 23 days ago 389th btnlq 923 59 6 Nov 2022 390th Lydxn 🇨🇦 923 90 6 May 2022 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 26 Aug 2025 395th mrxz 🇳🇱 922 58 3 Sep 2025 401st MichalMarsalek 🇨🇿 921 71 5 May 2022 401st Lydxn 🇨🇦 921 71 7 May 2022 401st GrayJoKing 🇦🇺 921 71 8 May 2022 401st JayXon 🇺🇸 921 71 8 May 2022 401st Steffan153 🇫🇮 921 71 9 Mar 2023 401st Shanethegamer 🇺🇸 921 71 15 May 2023 401st MeWhenI 🇻🇦 921 71 8 Aug 2023 401st sean-niemann 🇺🇸 921 71 9 Jan 2025 409th Steffan153 🇫🇮 921 76 15 May 2023 409th primo-ppcg 🇹🇭 921 76 15 May 2023 409th Lydxn 🇨🇦 921 76 22 May 2023 409th GrayJoKing 🇦🇺 921 76 24 Aug 2023 413th Herbert00709 🇵🇱 921 92 17 Nov 2023 413th 4QT0R 921 92 23 Nov 2023 413th ovs-code 🇩🇪 921 92 3 Jun 2024 416th xnor-gate 919 63 20 Jan 2025 417th Lydxn 🇨🇦 918 70 7 May 2022 417th JayXon 🇺🇸 918 70 7 May 2022 419th pardouin 🇫🇷 918 72 21 May 2025 420th primo-ppcg 🇹🇭 917 61 6 May 2022 420th sisyphus-ppcg 🇦🇺 917 61 14 Jul 2022 422nd Steffan153 🇫🇮 917 71 14 Oct 2022 422nd Shanethegamer 🇺🇸 917 71 15 Oct 2022 422nd stefangimmillaro 917 71 16 Oct 2022 422nd MeWhenI 🇻🇦 917 71 16 Oct 2022 426th annaproxy 917 79 24 Aug 2022 426th GrayJoKing 🇦🇺 917 79 28 Aug 2022 426th IanUtley 917 79 3 Nov 2023 426th Kacarott 🇦🇺 917 79 13 Jun 2024 430th Steffan153 🇫🇮 916 71 10 Dec 2022 430th synt7x 🇺🇸 916 71 7 Jul 2025 432nd JayXon 🇺🇸 916 79 5 Apr 2023 432nd Lydxn 🇨🇦 916 79 9 Apr 2023 434th Steffan153 🇫🇮 916 81 11 Dec 2023 435th arctouch-cristiannevianna 916 85 3 Apr 2023 435th tomtheisen 🇺🇸 916 85 10 Apr 2025 437th Natanaelel 🇸🇪 915 57 17 Jan 2024 437th Kacarott 🇦🇺 915 57 10 Sep 2024 439th Shanethegamer 🇺🇸 915 61 9 Oct 2023 439th edsrzf 🇳🇿 915 61 4 Jul 2025 441st Shanethegamer 🇺🇸 915 87 15 May 2023 441st JayXon 🇺🇸 915 87 15 May 2023 441st Steffan153 🇫🇮 915 87 16 May 2023 441st Lydxn 🇨🇦 915 87 16 May 2023 441st GrayJoKing 🇦🇺 915 87 11 Aug 2023 441st sean-niemann 🇺🇸 915 87 11 Jul 2024 447th ovs-code 🇩🇪 914 75 12 Sep 2024 447th Kacarott 🇦🇺 914 75 13 Sep 2024 449th Lydxn 🇨🇦 914 81 1 Apr 2023 450th AdamHe17 913 73 31 May 2022 First Prev 376–450 of 3,406 Next Last