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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 Submitted 358th YAJUE114514 926 72 17ms 15 Aug 2025 358th blaztoma 🇱🇹 926 72 39ms 26 Sep 2025 358th luuumine 🇫🇷 926 72 24ms 8 days ago 379th JayXon 🇺🇸 926 105 296ms 25 days ago 379th KasperKivimaeki 🇫🇮 926 105 283ms 25 days ago 381st ovs-code 🇩🇪 925 67 103ms 13 Dec 2022 381st Steffan153 🇫🇮 925 67 118ms 18 Dec 2022 381st Lydxn 🇨🇦 925 67 115ms 4 Feb 2023 381st sean-niemann 🇺🇸 925 67 110ms 7 Mar 2025 385th Bubbler-4 923 33 2,717ms 6 May 2022 385th rak1507 🇬🇧 923 33 119ms 8 May 2022 385th ngn 🇧🇬 923 33 26ms 11 May 2022 385th zacjl 923 33 36ms 3 Jun 2025 385th GrayJoKing 🇦🇺 923 33 15ms 4 Jun 2025 390th edsrzf 🇳🇿 923 54 1,619ms 13 Sep 2025 390th CaedenHarper 🇨🇦 923 54 1,405ms 27 Sep 2025 390th sean-niemann 🇺🇸 923 54 1,551ms 27 Sep 2025 393rd btnlq 923 59 8ms 6 Nov 2022 394th Lydxn 🇨🇦 923 90 135ms 6 May 2022 395th nwellnhof 🇩🇪 922 51 50ms 4 May 2022 395th primo-ppcg 🇹🇭 922 51 43ms 6 May 2022 395th janlelis 922 51 39ms 10 May 2022 395th Natanaelel 🇸🇪 922 51 39ms 2 Jun 2022 399th uiamn 922 58 11ms 6 Sep 2022 399th 5quiwyrm 922 58 12ms 29 Sep 2022 399th alasdair-greenland 922 58 10ms 13 Jan 2023 399th kirjavascript 922 58 11ms 4 Aug 2025 399th Posandu 922 58 11ms 26 Aug 2025 399th mrxz 🇳🇱 922 58 11ms 3 Sep 2025 405th Herbert00709 🇵🇱 922 92 70ms 17 Nov 2023 405th 4QT0R 922 92 67ms 23 Nov 2023 405th ovs-code 🇩🇪 922 92 64ms 3 Jun 2024 408th MichalMarsalek 🇨🇿 921 71 153ms 5 May 2022 408th Lydxn 🇨🇦 921 71 142ms 7 May 2022 408th GrayJoKing 🇦🇺 921 71 153ms 8 May 2022 408th JayXon 🇺🇸 921 71 133ms 8 May 2022 408th Steffan153 🇫🇮 921 71 145ms 9 Mar 2023 408th Shanethegamer 🇺🇸 921 71 128ms 15 May 2023 408th MeWhenI 🇻🇦 921 71 153ms 8 Aug 2023 408th sean-niemann 🇺🇸 921 71 151ms 9 Jan 2025 416th Steffan153 🇫🇮 921 76 12ms 15 May 2023 416th primo-ppcg 🇹🇭 921 76 23ms 15 May 2023 416th Lydxn 🇨🇦 921 76 10ms 22 May 2023 416th GrayJoKing 🇦🇺 921 76 12ms 24 Aug 2023 420th xnor-gate 919 63 194ms 20 Jan 2025 421st Lydxn 🇨🇦 918 70 96ms 7 May 2022 421st JayXon 🇺🇸 918 70 96ms 7 May 2022 423rd pardouin 🇫🇷 918 72 4,251ms 21 May 2025 424th primo-ppcg 🇹🇭 917 61 6ms 6 May 2022 424th sisyphus-ppcg 🇦🇺 917 61 10ms 14 Jul 2022 426th Steffan153 🇫🇮 917 71 117ms 14 Oct 2022 426th Shanethegamer 🇺🇸 917 71 107ms 15 Oct 2022 426th stefangimmillaro 917 71 111ms 16 Oct 2022 426th MeWhenI 🇻🇦 917 71 115ms 16 Oct 2022 430th annaproxy 917 79 128ms 24 Aug 2022 430th GrayJoKing 🇦🇺 917 79 89ms 28 Aug 2022 430th IanUtley 917 79 119ms 3 Nov 2023 430th Kacarott 🇦🇺 917 79 135ms 13 Jun 2024 434th Steffan153 🇫🇮 916 71 6ms 10 Dec 2022 434th synt7x 🇺🇸 916 71 4ms 7 Jul 2025 436th JayXon 🇺🇸 916 79 861ms 5 Apr 2023 436th Lydxn 🇨🇦 916 79 787ms 9 Apr 2023 438th Steffan153 🇫🇮 916 81 26ms 11 Dec 2023 439th arctouch-cristiannevianna 916 85 366ms 3 Apr 2023 439th tomtheisen 🇺🇸 916 85 340ms 10 Apr 2025 441st Natanaelel 🇸🇪 915 57 474ms 17 Jan 2024 441st Kacarott 🇦🇺 915 57 425ms 10 Sep 2024 443rd Shanethegamer 🇺🇸 915 61 5ms 9 Oct 2023 443rd edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 445th Shanethegamer 🇺🇸 915 87 390ms 15 May 2023 445th JayXon 🇺🇸 915 87 508ms 15 May 2023 445th Steffan153 🇫🇮 915 87 389ms 16 May 2023 445th Lydxn 🇨🇦 915 87 465ms 16 May 2023 445th GrayJoKing 🇦🇺 915 87 400ms 11 Aug 2023 445th sean-niemann 🇺🇸 915 87 458ms 11 Jul 2024 First Prev 376–450 of 3,416 Next Last