Collatz in Java in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Minesweeper 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 Tower of Hanoi 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 Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 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 Erlang 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 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 Minesweeper 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 Tower of Hanoi 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 Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 1st JayXon 🇺🇸 1,000 88 540ms 24 Sep 2025 2nd DialFrost 🇸🇬 989 89 402ms 24 Sep 2025 2nd ovs-code 🇩🇪 989 89 448ms 24 Sep 2025 2nd dokutan 989 89 417ms 24 Sep 2025 2nd sean-niemann 🇺🇸 989 89 456ms 24 Sep 2025 2nd Shanethegamer 🇺🇸 989 89 438ms 25 Sep 2025 2nd nwellnhof 🇩🇪 989 89 429ms 25 Sep 2025 2nd m-tkach 🇺🇦 989 89 415ms 25 Sep 2025 2nd namelessiw 989 89 456ms 2 Oct 2025 2nd Yewzir 🇧🇪 989 89 695ms 2 Oct 2025 2nd Yax42 🇫🇷 989 89 422ms 4 Oct 2025 2nd stefangimmillaro 989 89 428ms 6 Oct 2025 2nd CaedenHarper 🇨🇦 989 89 433ms 9 Oct 2025 2nd Jacob385 989 89 452ms 27 Oct 2025 2nd MeWhenI 🇻🇦 989 89 416ms 7 Nov 2025 2nd ethanlally 989 89 433ms 10 Nov 2025 2nd snoozingnewt 🇨🇦 989 89 394ms 15 days ago 2nd ScottHamper 989 89 436ms 8 days ago 2nd KasperKivimaeki 🇫🇮 989 89 442ms 8 days ago 20th h3ra993huskp 🇯🇵 978 90 440ms 9 days ago 21st kmathis22 967 91 548ms 18 days ago 22nd albanian-laundromat 936 94 415ms 24 Sep 2025 22nd jkelly467 936 94 544ms 23 Oct 2025 22nd HumanoidCPU 936 94 397ms 8 Nov 2025 25th 123mjb 917 96 356ms 18 days ago 25th noescareno 917 96 406ms 17 days ago 27th Liibe 907 97 391ms 25 Sep 2025 27th Schmitt-Very-Cool 907 97 435ms 26 Sep 2025 29th StronkCheese2 880 100 415ms 26 days ago 30th tigerdan2 🇩🇪 822 107 420ms 9 days ago 31st Lydxn 🇨🇦 704 125 368ms 6 May 2022 32nd Irratix 🇳🇱 698 126 398ms 4 May 2022 32nd janbehrens 🇩🇪 698 126 370ms 4 May 2022 32nd shellbertt 🇨🇦 698 126 371ms 4 May 2022 32nd inventshah 698 126 390ms 4 May 2022 32nd 5quiwyrm 698 126 374ms 4 Sep 2022 32nd KrausRaus 🇺🇸 698 126 379ms 9 Sep 2022 32nd Betuaredead 698 126 375ms 5 Jan 2023 32nd annaproxy 698 126 392ms 7 Jan 2023 32nd eMGeeneer 698 126 457ms 15 Jun 2024 32nd mrondon8 698 126 383ms 2 Dec 2024 32nd plastic-bottle 698 126 424ms 27 Aug 2025 43rd Luca2812 693 127 397ms 12 Dec 2022 43rd Apataras 693 127 391ms 16 Jul 2025 45th bac0id 688 128 418ms 29 Jun 2024 46th cbrt-x 682 129 389ms 6 May 2022 46th FlorianCassayre 🇫🇷 682 129 396ms 20 Sep 2022 46th piano-miles 682 129 415ms 8 Feb 2023 46th Widgitty 682 129 385ms 29 May 2023 46th lukashert 682 129 390ms 7 Jun 2023 46th yoshykai 682 129 372ms 27 Mar 2025 52nd bwat2 677 130 420ms 5 May 2022 53rd SiestaGuru 672 131 385ms 9 Jan 2023 54th c0d3-4-F00d 🇩🇪 667 132 381ms 6 May 2022 54th madeforlosers 667 132 403ms 26 Oct 2023 54th Blockyheadman 667 132 383ms 1 Nov 2023 54th SpiritAxolotl 🇺🇸 667 132 396ms 20 Mar 2024 58th ravnskjaer 🇩🇰 662 133 374ms 11 Sep 2024 59th althryenix 657 134 382ms 25 Jul 2022 59th MrGagnonHPS 657 134 397ms 1 Nov 2023 61st lukehewittvandy 652 135 403ms 18 Jul 2022 61st OriEy 652 135 382ms 27 Apr 2023 61st Maximizer02 652 135 405ms 8 Jun 2024 61st 0dyse 652 135 368ms 23 Apr 2025 65th crizin 🇰🇷 647 136 378ms 9 Sep 2023 65th TheZwierzLF 🇵🇱 647 136 412ms 2 Jun 2025 67th eshilo-draper 642 137 394ms 4 Sep 2022 68th azka1368 638 138 387ms 23 Nov 2023 69th Smetalo 633 139 387ms 25 Aug 2022 69th ToxicP1e 633 139 380ms 2 Mar 2023 71st yashima 624 141 369ms 19 Oct 2024 71st matas132 624 141 369ms 16 Sep 2025 71st katss2 624 141 389ms 19 Sep 2025 74th msbranicky 607 145 397ms 9 Jan 2024 75th deancureton 603 146 431ms 24 Mar 2024 1–75 of 108 Next Last