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 293rd Yewzir 🇧🇪 936 89 501ms 19 days ago 293rd Yax42 🇫🇷 936 89 429ms 18 days ago 293rd stefangimmillaro 936 89 445ms 16 days ago 293rd CaedenHarper 🇨🇦 936 89 421ms 12 days ago 305th nwellnhof 🇩🇪 933 42 4 May 2022 305th Lydxn 🇨🇦 933 42 4 May 2022 305th GrayJoKing 🇦🇺 933 42 4 May 2022 305th Steffan153 🇫🇮 933 42 16 Dec 2022 305th sisyphus-ppcg 🇦🇺 933 42 31 Jan 2023 305th ovs-code 🇩🇪 933 42 30 Dec 2023 305th sean-niemann 🇺🇸 933 42 8 Mar 2025 312th emplv 🇱🇻 933 60 5 May 2022 312th GrayJoKing 🇦🇺 933 60 6 May 2022 312th targrik 933 60 9ms 24 Dec 2024 312th xsot 🇸🇬 933 60 1 May 2025 316th GrayJoKing 🇦🇺 931 56 416ms 15 Jan 2024 316th AlephSquirrel 931 56 704ms 21 Jan 2024 318th MeWhenI 🇻🇦 931 68 23 Feb 2023 318th JayXon 🇺🇸 931 68 4 Mar 2025 320th m-tkach 🇺🇦 931 91 63ms 5 May 2022 320th 09cf 931 91 63ms 4 Oct 2023 322nd ovs-code 🇩🇪 930 60 7ms 9 Oct 2023 322nd GrayJoKing 🇦🇺 930 60 5ms 11 Oct 2023 322nd Lydxn 🇨🇦 930 60 7ms 11 Oct 2023 322nd GolfingSuccess 🇬🇷 930 60 5ms 16 Nov 2023 322nd Steffan153 🇫🇮 930 60 5ms 28 Jan 2024 322nd JayXon 🇺🇸 930 60 5ms 29 Jan 2024 322nd rucin93 🇵🇱 930 60 5ms 10 Jul 2024 322nd sean-niemann 🇺🇸 930 60 5ms 10 Jul 2024 330th Lydxn 🇨🇦 930 70 106ms 17 Oct 2022 330th JayXon 🇺🇸 930 70 110ms 17 Oct 2022 330th GrayJoKing 🇦🇺 930 70 3ms 13 Jul 2024 330th FlyingPenguin223 930 70 4ms 4 Oct 2024 330th jipsong 🇩🇪 930 70 6ms 5 Apr 2025 335th Natanaelel 🇸🇪 929 28 193ms 22 Jul 2022 335th SirBogman 🇺🇸 929 28 175ms 17 Sep 2022 337th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 337th JayXon 🇺🇸 929 67 53ms 19 Aug 2024 339th sisyphus-ppcg 🇦🇺 928 50 2,856ms 31 Jan 2023 339th saito-ta 🇯🇵 928 50 890ms 12 Dec 2024 341st JayXon 🇺🇸 928 57 19 Aug 2024 342nd roavin 927 84 23 Jun 2022 342nd tkr-sh 🇫🇷 927 84 20 Aug 2022 342nd Nickmiste 927 84 9 Nov 2022 342nd Matgc04 927 84 19 May 2023 342nd postie77 927 84 19 May 2023 342nd ertz1ertz 927 84 13 Sep 2024 342nd Grabnukebomb 927 84 13 Sep 2024 342nd Shanethegamer 🇺🇸 927 84 9 Apr 2025 342nd HumanoidCPU 927 84 370ms 10 Apr 2025 342nd annaproxy 927 84 340ms 11 Apr 2025 342nd Re-Adventures 🇮🇳 927 84 335ms 15 Apr 2025 342nd janbehrens 🇩🇪 927 84 352ms 17 Apr 2025 342nd Flix7dev 🇧🇪 927 84 336ms 16 hours ago 355th scpchicken 🇵🇼 926 72 21ms 4 May 2022 355th sultan 926 72 16ms 6 Jun 2022 355th annaproxy 926 72 23ms 22 Aug 2022 355th BlankSpruce 926 72 40ms 9 Sep 2022 355th ValentinCassayre 926 72 21ms 8 Oct 2022 355th commandblockguy 🇺🇸 926 72 23ms 3 Nov 2022 355th mathb0y512 926 72 27ms 1 Dec 2022 355th NoahBolohan 🇨🇦 926 72 23ms 28 Feb 2023 355th neel11235813 926 72 22ms 8 Mar 2023 355th Kacarott 🇦🇺 926 72 17ms 24 Mar 2023 355th Fracture17 926 72 21ms 8 Apr 2023 355th ayushdewan 926 72 29ms 7 May 2023 355th PeterTillema 🇳🇱 926 72 22ms 17 Oct 2023 355th Glinte 926 72 35ms 11 Dec 2023 355th nanatsu8 926 72 26ms 11 May 2024 355th thej10n 926 72 23ms 12 Jun 2024 355th duckyluuk 🇳🇱 926 72 21ms 13 Jun 2024 355th tobeannouncd 926 72 22ms 25 Apr 2025 355th YAJUE114514 926 72 17ms 15 Aug 2025 355th blaztoma 🇱🇹 926 72 39ms 25 days ago 355th luuumine 🇫🇷 926 72 28 hours ago First Prev 301–375 of 3,406 Next Last