Collatz in all languages 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) Taxicab Numbers 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 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) Taxicab Numbers 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 Turtle Tutorial # Golfer Points Chars Time Submitted 386th acollett89 904 59 12ms 17 Jun 2025 386th iczelia 🇩🇪 904 59 15ms 23 Sep 2025 386th Yax42 🇫🇷 904 59 10ms 20 Jan 2026 386th Protothor 904 59 11ms 27 Mar 2026 405th piano-miles 904 92 427ms 24 Feb 2026 406th edsrzf 🇳🇿 903 72 131ms 3 Jul 2025 407th Shanethegamer 🇺🇸 903 77 14ms 15 May 2023 408th marshallward 🇺🇸 903 83 41ms 10 May 2022 409th krcs 🇵🇱 903 86 407ms 10 May 2022 409th billings7 🇬🇧 903 86 444ms 15 May 2022 409th revlayle 🇺🇸 903 86 444ms 7 Dec 2022 409th albanian-laundromat 🇺🇸 903 86 462ms 30 Sep 2025 409th michelebastione 🇮🇹 903 86 435ms 3 days ago 414th m-tkach 🇺🇦 903 90 31ms 7 Dec 2023 415th edsrzf 🇳🇿 902 52 901ms 9 Mar 2026 416th Betuaredead 902 60 4ms 5 Jan 2023 416th Yewzir 🇧🇪 902 60 4ms 12 Feb 2023 416th Steffan153 🇫🇮 902 60 4ms 23 Feb 2023 416th GolfingSuccess 🇬🇷 902 60 4ms 16 Oct 2024 416th sean-niemann 🇺🇸 902 60 9ms 7 Mar 2025 421st shellbertt 🇨🇦 902 62 21ms 4 May 2022 421st ZakkkkAttackkkk 🇵🇭 902 62 21ms 5 May 2022 421st annaproxy 902 62 21ms 8 Jun 2022 421st bob-th 902 62 21ms 9 Jul 2022 421st btjones0 902 62 27ms 15 Jul 2022 421st tri1212 🇻🇳 902 62 21ms 18 Jul 2022 421st fredrik-bakke 🇳🇴 902 62 21ms 5 Oct 2022 421st jakobkordez 🇸🇮 902 62 19ms 19 Oct 2022 421st Fishron 902 62 20ms 29 Nov 2022 421st KatieLG 🇬🇧 902 62 24ms 11 Dec 2022 421st ItsMeNoobieboy 902 62 19ms 20 Dec 2022 421st firegene 🇮🇪 902 62 21ms 3 Jan 2023 421st ljweel 902 62 20ms 13 Feb 2023 421st 2011-Chan-Ethan 902 62 21ms 9 Jul 2023 421st elgan65536 🇺🇸 902 62 23ms 18 Nov 2023 421st Dataen 902 62 19ms 16 Jan 2024 421st Yewzir 🇧🇪 902 62 48ms 5 Apr 2024 421st cuboids 902 62 21ms 11 Jul 2024 421st wuzekai518 902 62 25ms 26 Jul 2024 421st abhishekg999 902 62 49ms 17 Sep 2024 421st lifthrasiir 🇰🇷 902 62 21ms 16 Nov 2024 421st Artemis21 🇬🇧 902 62 22ms 17 Jan 2025 421st lolgeny 902 62 20ms 22 Feb 2025 421st keelimeguy 🇺🇸 902 62 20ms 15 May 2025 421st DoubleUynn 902 62 22ms 25 Jun 2025 421st madeforlosers 902 62 22ms 24 days ago 421st LostSyntax21 🇬🇧 902 62 20ms 116 mins ago 448th kg583 🇺🇸 902 77 17ms 11 Mar 2026 449th edsrzf 🇳🇿 902 83 41ms 14 Jan 2025 449th kg583 🇺🇸 902 83 42ms 14 Feb 2025 451st MeWhenI 🇻🇦 901 63 209ms 5 May 2022 452nd Kacarott 🇦🇺 901 79 121ms 13 Jun 2024 453rd stefangimmillaro 901 92 132ms 24 Oct 2023 453rd inverseLorentz 🇦🇺 901 92 129ms 27 May 2024 453rd sean-niemann 🇺🇸 901 92 135ms 8 Jun 2025 453rd ian-h-chamberlain 🇺🇸 901 92 136ms 23 Nov 2025 457th michael-pruglo 🇺🇦 901 94 62ms 5 Jul 2022 457th zygoloid 901 94 62ms 5 Aug 2024 457th AdrienHache 🇫🇷 901 94 60ms 27 Dec 2025 460th Lydxn 🇨🇦 900 64 181ms 1 Apr 2023 461st MeWhenI 🇻🇦 899 71 139ms 20 Aug 2024 462nd Steffan153 🇫🇮 899 82 42ms 1 Apr 2023 462nd sean-niemann 🇺🇸 899 82 42ms 12 Jul 2024 464th Lydxn 🇨🇦 898 49 39ms 4 May 2022 464th JayXon 🇺🇸 898 49 40ms 17 Oct 2022 464th GrayJoKing 🇦🇺 898 49 44ms 15 Nov 2022 464th radarek 🇵🇱 898 49 216ms 26 Aug 2025 468th Lydxn 🇨🇦 898 70 101ms 7 May 2022 469th m-tkach 🇺🇦 898 72 111ms 16 Oct 2022 469th GrayJoKing 🇦🇺 898 72 112ms 22 Oct 2022 469th emplv 🇱🇻 898 72 111ms 27 Oct 2022 469th sean-niemann 🇺🇸 898 72 126ms 7 Mar 2025 473rd albanian-laundromat 🇺🇸 897 106 329ms 22 Dec 2025 474th DialFrost 🇸🇬 896 74 16ms 22 Feb 2026 474th Steffan153 🇫🇮 896 74 16ms 22 Feb 2026 474th GrayJoKing 🇦🇺 896 74 17ms 22 Feb 2026 474th GolfingSuccess 🇬🇷 896 74 16ms 24 Feb 2026 474th snoozingnewt 🇨🇦 896 74 17ms 4 Mar 2026 474th edsrzf 🇳🇿 896 74 16ms 9 Mar 2026 480th Lydxn 🇨🇦 895 69 6ms 12 Sep 2022 480th GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 480th btnlq 895 69 7ms 24 Sep 2022 480th trinityy-7 895 69 2ms 7 Aug 2025 484th Steffan153 🇫🇮 894 67 118ms 18 Dec 2022 484th Lydxn 🇨🇦 894 67 122ms 4 Feb 2023 484th DialFrost 🇸🇬 894 67 109ms 17 Mar 2025 487th Lydxn 🇨🇦 894 72 353ms 16 Jul 2023 488th SirBogman 🇺🇸 893 50 408ms 5 May 2022 488th nwellnhof 🇩🇪 893 50 398ms 3 Jun 2022 488th Lydxn 🇨🇦 893 50 515ms 15 Aug 2022 488th Steffan153 🇫🇮 893 50 455ms 9 Aug 2024 492nd NickTheEASDude 🇺🇸 893 76 6ms 7 May 2024 492nd edsrzf 🇳🇿 893 76 6ms 23 Dec 2025 492nd Shanethegamer 🇺🇸 893 76 5ms 23 Dec 2025 492nd jared-hughes 893 76 5ms 24 Dec 2025 492nd Waffle3z 893 76 5ms 26 Dec 2025 492nd Blendi-Goose 893 76 5ms 6 Feb 2026 492nd kTheLemon 893 76 5ms 7 Mar 2026 499th MichalMarsalek 🇨🇿 893 87 443ms 5 May 2022 499th Kloppermand 🇩🇰 893 87 436ms 7 Oct 2022 First Prev 401–500 of 3,671 Next Last