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 300th Lydxn 🇨🇦 933 42 4 May 2022 300th GrayJoKing 🇦🇺 933 42 4 May 2022 300th Steffan153 🇫🇮 933 42 16 Dec 2022 300th sisyphus-ppcg 🇦🇺 933 42 31 Jan 2023 300th ovs-code 🇩🇪 933 42 30 Dec 2023 300th sean-niemann 🇺🇸 933 42 8 Mar 2025 307th emplv 🇱🇻 933 60 5 May 2022 307th GrayJoKing 🇦🇺 933 60 6 May 2022 307th targrik 933 60 24 Dec 2024 307th xsot 🇸🇬 933 60 1 May 2025 311th MeWhenI 🇻🇦 931 68 23 Feb 2023 311th JayXon 🇺🇸 931 68 4 Mar 2025 313th m-tkach 🇺🇦 931 91 5 May 2022 313th 09cf 931 91 4 Oct 2023 315th GrayJoKing 🇦🇺 930 56 15 Jan 2024 315th AlephSquirrel 930 56 21 Jan 2024 317th ovs-code 🇩🇪 930 60 9 Oct 2023 317th GrayJoKing 🇦🇺 930 60 11 Oct 2023 317th Lydxn 🇨🇦 930 60 11 Oct 2023 317th GolfingSuccess 🇬🇷 930 60 16 Nov 2023 317th Steffan153 🇫🇮 930 60 28 Jan 2024 317th JayXon 🇺🇸 930 60 29 Jan 2024 317th rucin93 🇵🇱 930 60 10 Jul 2024 317th sean-niemann 🇺🇸 930 60 10 Jul 2024 325th Lydxn 🇨🇦 930 70 17 Oct 2022 325th JayXon 🇺🇸 930 70 17 Oct 2022 325th GrayJoKing 🇦🇺 930 70 13 Jul 2024 325th FlyingPenguin223 930 70 4 Oct 2024 325th jipsong 🇩🇪 930 70 5 Apr 2025 330th Natanaelel 🇸🇪 929 28 22 Jul 2022 330th SirBogman 🇺🇸 929 28 17 Sep 2022 332nd Steffan153 🇫🇮 929 67 19 Aug 2024 332nd JayXon 🇺🇸 929 67 19 Aug 2024 334th sisyphus-ppcg 🇦🇺 928 50 31 Jan 2023 334th saito-ta 🇯🇵 928 50 12 Dec 2024 336th JayXon 🇺🇸 928 57 19 Aug 2024 337th roavin 927 84 23 Jun 2022 337th tkr-sh 🇫🇷 927 84 20 Aug 2022 337th Nickmiste 927 84 9 Nov 2022 337th Matgc04 927 84 19 May 2023 337th postie77 927 84 19 May 2023 337th ertz1ertz 927 84 13 Sep 2024 337th Grabnukebomb 927 84 13 Sep 2024 337th Shanethegamer 🇺🇸 927 84 9 Apr 2025 337th HumanoidCPU 927 84 10 Apr 2025 337th annaproxy 927 84 11 Apr 2025 337th Re-Adventures 🇮🇳 927 84 15 Apr 2025 337th janbehrens 🇩🇪 927 84 17 Apr 2025 349th scpchicken 🇵🇼 926 72 4 May 2022 349th sultan 926 72 6 Jun 2022 349th annaproxy 926 72 22 Aug 2022 349th BlankSpruce 926 72 9 Sep 2022 349th ValentinCassayre 926 72 8 Oct 2022 349th commandblockguy 🇺🇸 926 72 3 Nov 2022 349th mathb0y512 926 72 1 Dec 2022 349th NoahBolohan 🇨🇦 926 72 28 Feb 2023 349th neel11235813 926 72 8 Mar 2023 349th Kacarott 🇦🇺 926 72 24 Mar 2023 349th Fracture17 926 72 8 Apr 2023 349th ayushdewan 926 72 7 May 2023 349th PeterTillema 🇳🇱 926 72 17 Oct 2023 349th Glinte 926 72 11 Dec 2023 349th nanatsu8 926 72 11 May 2024 349th thej10n 926 72 12 Jun 2024 349th duckyluuk 🇳🇱 926 72 13 Jun 2024 349th tobeannouncd 926 72 25 Apr 2025 349th YAJUE114514 926 72 15 Aug 2025 349th blaztoma 🇱🇹 926 72 7 days ago 369th JayXon 🇺🇸 926 105 13 hours ago 369th KasperKivimaeki 🇫🇮 926 105 9 hours ago 371st ovs-code 🇩🇪 925 67 13 Dec 2022 371st Steffan153 🇫🇮 925 67 18 Dec 2022 371st Lydxn 🇨🇦 925 67 4 Feb 2023 371st sean-niemann 🇺🇸 925 67 7 Mar 2025 375th Bubbler-4 923 33 6 May 2022 First Prev 301–375 of 3,372 Next Last