Collatz in Java 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 1st JayXon 🇺🇸 1,000 88 466ms 24 Sep 2025 2nd DialFrost 🇸🇬 989 89 401ms 24 Sep 2025 2nd ovs-code 🇩🇪 989 89 584ms 24 Sep 2025 2nd dokutan 989 89 439ms 24 Sep 2025 2nd sean-niemann 🇺🇸 989 89 391ms 24 Sep 2025 2nd Shanethegamer 🇺🇸 989 89 436ms 25 Sep 2025 2nd nwellnhof 🇩🇪 989 89 368ms 27 days ago 2nd m-tkach 🇺🇦 989 89 491ms 27 days ago 2nd namelessiw 989 89 400ms 20 days ago 2nd Yewzir 🇧🇪 989 89 501ms 20 days ago 2nd Yax42 🇫🇷 989 89 429ms 18 days ago 2nd stefangimmillaro 989 89 445ms 17 days ago 2nd CaedenHarper 🇨🇦 989 89 421ms 13 days ago 14th albanian-laundromat 936 94 462ms 24 Sep 2025 14th kmathis22 936 94 466ms 8 days ago 16th snoozingnewt 🇺🇸 926 95 444ms 14 days ago 17th Liibe 907 97 446ms 27 days ago 18th Schmitt-Very-Cool 898 98 496ms 26 days ago 19th Lydxn 🇨🇦 704 125 323ms 6 May 2022 20th Irratix 🇳🇱 698 126 409ms 4 May 2022 20th MeWhenI 🇻🇦 698 126 421ms 4 May 2022 20th janbehrens 🇩🇪 698 126 397ms 4 May 2022 20th shellbertt 🇨🇦 698 126 402ms 4 May 2022 20th inventshah 698 126 419ms 4 May 2022 20th ScottHamper 698 126 401ms 5 May 2022 20th 5quiwyrm 698 126 347ms 4 Sep 2022 20th KrausRaus 🇺🇸 698 126 477ms 9 Sep 2022 20th Betuaredead 698 126 409ms 5 Jan 2023 20th annaproxy 698 126 429ms 7 Jan 2023 20th Jacob385 698 126 393ms 4 Mar 2024 20th eMGeeneer 698 126 390ms 15 Jun 2024 20th mrondon8 698 126 401ms 2 Dec 2024 20th plastic-bottle 698 126 446ms 27 Aug 2025 34th Luca2812 693 127 434ms 12 Dec 2022 34th h3ra993huskp 🇯🇵 693 127 399ms 17 Sep 2023 34th tigerdan2 🇩🇪 693 127 433ms 19 Dec 2023 34th Apataras 693 127 418ms 16 Jul 2025 38th cbrt-x 682 129 422ms 6 May 2022 38th piano-miles 682 129 403ms 8 Feb 2023 38th lukashert 682 129 407ms 7 Jun 2023 38th bac0id 682 129 343ms 29 Jun 2024 38th yoshykai 682 129 437ms 27 Mar 2025 43rd bwat2 677 130 483ms 5 May 2022 43rd FlorianCassayre 🇫🇷 677 130 450ms 20 Sep 2022 43rd Widgitty 677 130 440ms 29 May 2023 46th SiestaGuru 672 131 381ms 9 Jan 2023 46th HumanoidCPU 672 131 423ms 7 May 2024 48th c0d3-4-F00d 🇩🇪 667 132 418ms 6 May 2022 48th madeforlosers 667 132 346ms 26 Oct 2023 48th Blockyheadman 667 132 468ms 1 Nov 2023 48th SpiritAxolotl 🇺🇸 667 132 346ms 20 Mar 2024 52nd ravnskjaer 🇩🇰 662 133 400ms 11 Sep 2024 52nd 123mjb 662 133 394ms 27 days ago 54th althryenix 657 134 353ms 25 Jul 2022 54th MrGagnonHPS 657 134 368ms 1 Nov 2023 54th noescareno 657 134 401ms 31 May 2025 57th lukehewittvandy 652 135 393ms 18 Jul 2022 57th OriEy 652 135 425ms 27 Apr 2023 57th Maximizer02 652 135 420ms 8 Jun 2024 57th 0dyse 652 135 428ms 23 Apr 2025 61st crizin 🇰🇷 647 136 413ms 9 Sep 2023 61st TheZwierzLF 🇵🇱 647 136 460ms 2 Jun 2025 63rd eshilo-draper 642 137 337ms 4 Sep 2022 64th azka1368 638 138 459ms 23 Nov 2023 65th Smetalo 633 139 361ms 25 Aug 2022 65th ToxicP1e 633 139 394ms 2 Mar 2023 67th yashima 624 141 323ms 19 Oct 2024 67th matas132 624 141 416ms 16 Sep 2025 67th katss2 624 141 392ms 19 Sep 2025 70th msbranicky 607 145 401ms 9 Jan 2024 71st deancureton 603 146 444ms 24 Mar 2024 72nd pyuraii 591 149 407ms 27 Sep 2022 72nd Chinay-Domitrix 🇺🇸 591 149 416ms 29 Mar 2025 74th KyleLashmet 587 150 401ms 18 Jul 2022 74th Pyro569 587 150 415ms 20 Jul 2023 1–75 of 104 Next Last