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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 1st JayXon 🇺🇸 1,000 88 390ms 24 Sep 2025 1st Lydxn 🇨🇦 1,000 88 409ms 12 Dec 2025 3rd DialFrost 🇸🇬 989 89 513ms 24 Sep 2025 3rd ovs-code 🇩🇪 989 89 474ms 24 Sep 2025 3rd dokutan 989 89 372ms 24 Sep 2025 3rd sean-niemann 🇺🇸 989 89 397ms 24 Sep 2025 3rd Shanethegamer 🇺🇸 989 89 477ms 25 Sep 2025 3rd nwellnhof 🇩🇪 989 89 454ms 25 Sep 2025 3rd m-tkach 🇺🇦 989 89 386ms 25 Sep 2025 3rd namelessiw 989 89 390ms 2 Oct 2025 3rd Yewzir 🇧🇪 989 89 349ms 2 Oct 2025 3rd Yax42 🇫🇷 989 89 496ms 4 Oct 2025 3rd stefangimmillaro 989 89 489ms 6 Oct 2025 3rd CaedenHarper 🇨🇦 989 89 467ms 9 Oct 2025 3rd Jacob385 989 89 491ms 27 Oct 2025 3rd MeWhenI 🇻🇦 989 89 449ms 7 Nov 2025 3rd ethanlally 989 89 380ms 10 Nov 2025 3rd snoozingnewt 🇨🇦 989 89 384ms 23 Nov 2025 3rd ScottHamper 989 89 467ms 30 Nov 2025 3rd KasperKivimaeki 🇫🇮 989 89 444ms 30 Nov 2025 3rd jusaka 989 89 415ms 7 hours ago 22nd h3ra993huskp 🇯🇵 978 90 425ms 30 Nov 2025 23rd kmathis22 967 91 370ms 20 Nov 2025 24th piano-miles 957 92 411ms 24 Feb 2026 25th albanian-laundromat 936 94 486ms 24 Sep 2025 25th jkelly467 936 94 401ms 23 Oct 2025 25th HumanoidCPU 936 94 479ms 8 Nov 2025 28th 123mjb 917 96 366ms 20 Nov 2025 28th noescareno 917 96 366ms 21 Nov 2025 30th Liibe 907 97 477ms 25 Sep 2025 30th Schmitt-Very-Cool 907 97 434ms 26 Sep 2025 32nd beardotpdf 889 99 422ms 12 Dec 2025 33rd CarterStroik 880 100 530ms 13 Nov 2025 34th ravnskjaer 🇩🇰 838 105 494ms 15 Dec 2025 35th tigerdan2 🇩🇪 822 107 424ms 30 Nov 2025 36th TheZwierzLF 🇵🇱 815 108 407ms 13 Dec 2025 37th Irratix 🇳🇱 698 126 412ms 4 May 2022 37th janbehrens 🇩🇪 698 126 398ms 4 May 2022 37th shellbertt 🇨🇦 698 126 408ms 4 May 2022 37th inventshah 698 126 414ms 4 May 2022 37th 5quiwyrm 698 126 404ms 4 Sep 2022 37th KrausRaus 🇺🇸 698 126 407ms 9 Sep 2022 37th Betuaredead 698 126 388ms 5 Jan 2023 37th annaproxy 698 126 377ms 7 Jan 2023 37th eMGeeneer 698 126 384ms 15 Jun 2024 37th mrondon8 698 126 400ms 2 Dec 2024 37th plastic-bottle 698 126 436ms 27 Aug 2025 48th Luca2812 693 127 397ms 12 Dec 2022 48th Apataras 693 127 386ms 16 Jul 2025 50th bac0id 688 128 381ms 29 Jun 2024 51st cbrt-x 682 129 408ms 6 May 2022 51st FlorianCassayre 🇫🇷 682 129 389ms 20 Sep 2022 51st Widgitty 682 129 396ms 29 May 2023 51st lukashert 682 129 405ms 7 Jun 2023 51st yoshykai 682 129 415ms 27 Mar 2025 56th bwat2 677 130 380ms 5 May 2022 57th SiestaGuru 672 131 390ms 9 Jan 2023 58th c0d3-4-F00d 🇩🇪 667 132 402ms 6 May 2022 58th madeforlosers 667 132 415ms 26 Oct 2023 58th Blockyheadman 667 132 400ms 1 Nov 2023 58th SpiritAxolotl 🇺🇸 667 132 383ms 20 Mar 2024 62nd althryenix 657 134 398ms 25 Jul 2022 62nd MrGagnonHPS 657 134 401ms 1 Nov 2023 64th lukehewittvandy 652 135 388ms 18 Jul 2022 64th OriEy 652 135 418ms 27 Apr 2023 64th Maximizer02 652 135 402ms 8 Jun 2024 64th 0dyse 652 135 401ms 23 Apr 2025 68th crizin 🇰🇷 647 136 397ms 9 Sep 2023 69th eshilo-draper 642 137 395ms 4 Sep 2022 70th azka1368 638 138 396ms 23 Nov 2023 71st Smetalo 633 139 388ms 25 Aug 2022 71st ToxicP1e 633 139 416ms 2 Mar 2023 73rd yashima 624 141 419ms 19 Oct 2024 73rd matas132 624 141 399ms 16 Sep 2025 73rd katss2 624 141 425ms 19 Sep 2025 76th msbranicky 607 145 407ms 9 Jan 2024 77th deancureton 603 146 369ms 24 Mar 2024 78th pyuraii 591 149 397ms 27 Sep 2022 78th Chinay-Domitrix 🇺🇸 591 149 408ms 29 Mar 2025 80th KyleLashmet 587 150 408ms 18 Jul 2022 1–80 of 110 Next Last