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 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 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 375th plastic-bottle 923 127 13 Sep 2023 375th h3ra993huskp 🇯🇵 923 127 17 Sep 2023 375th tigerdan2 🇩🇪 923 127 19 Dec 2023 375th Apataras 923 127 19 days ago 380th uiamn 922 58 6 Sep 2022 380th 5quiwyrm 922 58 29 Sep 2022 380th alasdair-greenland 922 58 13 Jan 2023 380th kirjavascript 922 58 2 hours ago 384th btnlq 922 59 6 Nov 2022 385th Lydxn 🇨🇦 922 90 6 May 2022 386th Lydxn 🇨🇦 922 108 6 May 2022 386th JayXon 🇺🇸 922 108 9 May 2022 388th nwellnhof 🇩🇪 921 51 4 May 2022 388th primo-ppcg 🇹🇭 921 51 6 May 2022 388th radarek 🇵🇱 921 51 8 May 2022 388th janlelis 921 51 10 May 2022 388th Natanaelel 🇸🇪 921 51 2 Jun 2022 393rd Herbert00709 🇵🇱 921 92 17 Nov 2023 393rd 4QT0R 921 92 23 Nov 2023 393rd ovs-code 🇩🇪 921 92 3 Jun 2024 396th MichalMarsalek 🇨🇿 920 71 5 May 2022 396th Lydxn 🇨🇦 920 71 7 May 2022 396th GrayJoKing 🇦🇺 920 71 8 May 2022 396th JayXon 🇺🇸 920 71 8 May 2022 396th Steffan153 🇫🇮 920 71 9 Mar 2023 396th Shanethegamer 🇺🇸 920 71 15 May 2023 396th MeWhenI 🇻🇦 920 71 8 Aug 2023 396th sean-niemann 🇺🇸 920 71 9 Jan 2025 404th xnor-gate 919 63 20 Jan 2025 405th Steffan153 🇫🇮 919 76 15 May 2023 405th primo-ppcg 🇹🇭 919 76 15 May 2023 405th Lydxn 🇨🇦 919 76 22 May 2023 405th GrayJoKing 🇦🇺 919 76 24 Aug 2023 409th primo-ppcg 🇹🇭 917 61 6 May 2022 409th sisyphus-ppcg 🇦🇺 917 61 14 Jul 2022 411th Lydxn 🇨🇦 916 70 7 May 2022 411th JayXon 🇺🇸 916 70 7 May 2022 413th Steffan153 🇫🇮 916 71 14 Oct 2022 413th Shanethegamer 🇺🇸 916 71 15 Oct 2022 413th stefangimmillaro 916 71 16 Oct 2022 413th MeWhenI 🇻🇦 916 71 16 Oct 2022 417th arctouch-cristiannevianna 916 85 3 Apr 2023 417th tomtheisen 🇺🇸 916 85 10 Apr 2025 419th Steffan153 🇫🇮 915 71 10 Dec 2022 419th synt7x 915 71 7 Jul 2025 421st annaproxy 915 79 24 Aug 2022 421st GrayJoKing 🇦🇺 915 79 28 Aug 2022 421st IanUtley 915 79 3 Nov 2023 421st Kacarott 🇦🇺 915 79 13 Jun 2024 425th Natanaelel 🇸🇪 914 57 17 Jan 2024 425th Kacarott 🇦🇺 914 57 10 Sep 2024 427th Shanethegamer 🇺🇸 914 61 9 Oct 2023 427th edsrzf 🇳🇿 914 61 4 Jul 2025 429th JayXon 🇺🇸 914 79 5 Apr 2023 429th Lydxn 🇨🇦 914 79 9 Apr 2023 431st Steffan153 🇫🇮 914 81 11 Dec 2023 432nd Shanethegamer 🇺🇸 914 87 15 May 2023 432nd JayXon 🇺🇸 914 87 15 May 2023 432nd Steffan153 🇫🇮 914 87 16 May 2023 432nd Lydxn 🇨🇦 914 87 16 May 2023 432nd GrayJoKing 🇦🇺 914 87 11 Aug 2023 432nd sean-niemann 🇺🇸 914 87 11 Jul 2024 438th sean-niemann 🇺🇸 914 109 25 May 2024 438th CaedenHarper 🇨🇦 914 109 28 Jan 2025 440th pardouin 🇫🇷 913 72 21 May 2025 441st AdamHe17 913 73 31 May 2022 441st AliceFord 913 73 2 Jun 2022 441st Natanaelel 🇸🇪 913 73 16 Jun 2022 441st btjones0 913 73 21 Jun 2022 441st marcin7Cd 913 73 27 Jun 2022 441st tri1212 🇻🇳 913 73 18 Jul 2022 441st vhoulbreque 🇫🇷 913 73 18 Aug 2022 441st KatieLG 🇬🇧 913 73 29 Aug 2022 441st tkr-sh 🇫🇷 913 73 8 Sep 2022 441st jroscoe5 913 73 15 Sep 2022 Prev 376–450 of 3,225 Next