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Collatz in Java in bytes. 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim 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 Bytes Time Submitted 1st JayXon 🇺🇸 1,000 88 455ms 24 Sep 2025 1st Lydxn 🇨🇦 1,000 88 417ms 12 Dec 2025 3rd DialFrost 🇸🇬 989 89 462ms 24 Sep 2025 3rd ovs-code 🇩🇪 989 89 490ms 24 Sep 2025 3rd dokutan 989 89 601ms 24 Sep 2025 3rd sean-niemann 🇺🇸 989 89 443ms 24 Sep 2025 3rd Shanethegamer 🇺🇸 989 89 450ms 25 Sep 2025 3rd nwellnhof 🇩🇪 989 89 491ms 25 Sep 2025 3rd m-tkach 🇺🇦 989 89 441ms 25 Sep 2025 3rd namelessiw 989 89 486ms 2 Oct 2025 3rd Yewzir 🇧🇪 989 89 502ms 2 Oct 2025 3rd Yax42 🇫🇷 989 89 458ms 4 Oct 2025 3rd stefangimmillaro 989 89 481ms 6 Oct 2025 3rd CaedenHarper 🇨🇦 989 89 482ms 9 Oct 2025 3rd Jacob385 989 89 451ms 27 Oct 2025 3rd MeWhenI 🇻🇦 989 89 501ms 7 Nov 2025 3rd ethanlally 989 89 507ms 10 Nov 2025 3rd snoozingnewt 🇨🇦 989 89 437ms 23 Nov 2025 3rd ScottHamper 989 89 441ms 30 Nov 2025 3rd KasperKivimaeki 🇫🇮 989 89 462ms 30 Nov 2025 21st h3ra993huskp 🇯🇵 978 90 538ms 30 Nov 2025 22nd kmathis22 967 91 471ms 20 Nov 2025 23rd piano-miles 957 92 427ms 24 Feb 2026 24th albanian-laundromat 🇺🇸 936 94 455ms 24 Sep 2025 24th jkelly467 936 94 476ms 23 Oct 2025 24th HumanoidCPU 936 94 454ms 8 Nov 2025 27th madeforlosers 926 95 450ms 20 days ago 28th 123mjb 917 96 468ms 20 Nov 2025 28th noescareno 917 96 450ms 21 Nov 2025 30th Liibe 907 97 549ms 25 Sep 2025 31st Schmitt-Very-Cool 898 98 456ms 26 Sep 2025 32nd beardotpdf 889 99 436ms 12 Dec 2025 33rd CarterStroik 880 100 470ms 13 Nov 2025 33rd Jonson26 880 100 377ms 15 days ago 35th Nathan-Masala 863 102 458ms 23 days ago 36th ravnskjaer 🇩🇰 838 105 725ms 15 Dec 2025 37th tigerdan2 🇩🇪 822 107 543ms 30 Nov 2025 38th TheZwierzLF 🇵🇱 815 108 492ms 13 Dec 2025 39th Widgitty 800 110 399ms 22 hours ago 40th Irratix 🇳🇱 698 126 403ms 4 May 2022 40th janbehrens 🇩🇪 698 126 409ms 4 May 2022 40th shellbertt 🇨🇦 698 126 395ms 4 May 2022 40th inventshah 698 126 391ms 4 May 2022 40th 5quiwyrm 698 126 381ms 4 Sep 2022 40th KrausRaus 🇺🇸 698 126 396ms 9 Sep 2022 40th Betuaredead 698 126 424ms 5 Jan 2023 40th annaproxy 698 126 381ms 7 Jan 2023 40th eMGeeneer 698 126 382ms 15 Jun 2024 40th mrondon8 698 126 391ms 2 Dec 2024 40th plastic-bottle 698 126 414ms 27 Aug 2025 51st Luca2812 693 127 372ms 12 Dec 2022 51st Apataras 693 127 408ms 16 Jul 2025 53rd cbrt-x 682 129 370ms 6 May 2022 53rd lukashert 682 129 401ms 7 Jun 2023 53rd bac0id 682 129 397ms 29 Jun 2024 53rd yoshykai 682 129 371ms 27 Mar 2025 57th bwat2 677 130 391ms 5 May 2022 57th FlorianCassayre 🇫🇷 677 130 373ms 20 Sep 2022 59th SiestaGuru 672 131 401ms 9 Jan 2023 60th c0d3-4-F00d 🇩🇪 667 132 412ms 6 May 2022 60th Blockyheadman 667 132 398ms 1 Nov 2023 60th SpiritAxolotl 🇺🇸 667 132 392ms 20 Mar 2024 63rd althryenix 657 134 381ms 25 Jul 2022 63rd MrGagnonHPS 657 134 387ms 1 Nov 2023 65th lukehewittvandy 652 135 380ms 18 Jul 2022 65th OriEy 652 135 399ms 27 Apr 2023 65th Maximizer02 652 135 416ms 8 Jun 2024 65th 0dyse 652 135 408ms 23 Apr 2025 69th crizin 🇰🇷 647 136 434ms 9 Sep 2023 70th eshilo-draper 642 137 386ms 4 Sep 2022 71st azka1368 638 138 382ms 23 Nov 2023 72nd Smetalo 633 139 405ms 25 Aug 2022 72nd ToxicP1e 633 139 403ms 2 Mar 2023 74th yashima 624 141 405ms 19 Oct 2024 74th matas132 624 141 407ms 16 Sep 2025 74th katss2 624 141 427ms 19 Sep 2025 77th msbranicky 607 145 364ms 9 Jan 2024 78th deancureton 603 146 368ms 24 Mar 2024 79th pyuraii 591 149 404ms 27 Sep 2022 79th Chinay-Domitrix 🇺🇸 591 149 389ms 29 Mar 2025 81st KyleLashmet 587 150 384ms 18 Jul 2022 81st Pyro569 587 150 385ms 20 Jul 2023 81st aDwarfNamedUrist 587 150 377ms 30 Aug 2023 84th GeneralFabian 583 151 500ms 2 Dec 2024 85th lukemalek 575 153 380ms 10 Oct 2022 85th bidger 575 153 413ms 13 Nov 2022 85th astdefu 575 153 437ms 10 Dec 2022 88th Geird 568 155 391ms 22 Feb 2023 88th hidude562 568 155 380ms 21 Jun 2023 90th luca1339 564 156 406ms 10 Jun 2024 91st LunaHD24 553 159 388ms 30 Apr 2024 92nd clayboll99 550 160 403ms 15 Jul 2025 93rd jonah1068 543 162 421ms 15 Sep 2023 94th kanjurer 524 168 406ms 29 Sep 2022 94th noahdorsch 524 168 410ms 6 Mar 2025 96th sonisonjames 515 171 410ms 26 Nov 2022 97th winigo3 500 176 403ms 8 Aug 2022 98th atazzam 🇺🇸 473 186 430ms 20 May 2023 99th Bodo171 454 194 384ms 1 Dec 2022 100th carlosbviteri 423 208 442ms 25 Apr 2024 1–100 of 111 Next Last