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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) 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 Chars Time Submitted 384th Yax42 🇫🇷 904 59 11ms 20 Jan 2026 384th Protothor 904 59 11ms 27 Mar 2026 403rd Steffan153 🇫🇮 904 81 1,429ms 10 days ago 404th piano-miles 904 92 464ms 24 Feb 2026 405th edsrzf 🇳🇿 903 72 131ms 3 Jul 2025 406th Shanethegamer 🇺🇸 903 77 14ms 15 May 2023 407th marshallward 🇺🇸 903 83 40ms 10 May 2022 408th krcs 🇵🇱 903 86 407ms 10 May 2022 408th billings7 🇬🇧 903 86 444ms 15 May 2022 408th revlayle 🇺🇸 903 86 444ms 7 Dec 2022 408th albanian-laundromat 🇺🇸 903 86 462ms 30 Sep 2025 408th michelebastione 🇮🇹 903 86 435ms 29 mins ago 413th m-tkach 🇺🇦 903 90 31ms 7 Dec 2023 414th edsrzf 🇳🇿 902 52 901ms 9 Mar 2026 415th Betuaredead 902 60 4ms 5 Jan 2023 415th Yewzir 🇧🇪 902 60 4ms 12 Feb 2023 415th Steffan153 🇫🇮 902 60 4ms 23 Feb 2023 415th GolfingSuccess 🇬🇷 902 60 4ms 16 Oct 2024 415th sean-niemann 🇺🇸 902 60 9ms 7 Mar 2025 420th shellbertt 🇨🇦 902 62 21ms 4 May 2022 420th ZakkkkAttackkkk 🇵🇭 902 62 21ms 5 May 2022 420th annaproxy 902 62 21ms 8 Jun 2022 420th bob-th 902 62 21ms 9 Jul 2022 420th btjones0 902 62 27ms 15 Jul 2022 420th tri1212 🇻🇳 902 62 21ms 18 Jul 2022 420th fredrik-bakke 🇳🇴 902 62 21ms 5 Oct 2022 420th jakobkordez 🇸🇮 902 62 19ms 19 Oct 2022 420th Fishron 902 62 20ms 29 Nov 2022 420th KatieLG 🇬🇧 902 62 24ms 11 Dec 2022 420th ItsMeNoobieboy 902 62 19ms 20 Dec 2022 420th firegene 🇮🇪 902 62 21ms 3 Jan 2023 420th ljweel 902 62 20ms 13 Feb 2023 420th 2011-Chan-Ethan 902 62 21ms 9 Jul 2023 420th elgan65536 🇺🇸 902 62 23ms 18 Nov 2023 420th Dataen 902 62 19ms 16 Jan 2024 420th Yewzir 🇧🇪 902 62 48ms 5 Apr 2024 420th cuboids 902 62 21ms 11 Jul 2024 420th wuzekai518 902 62 25ms 26 Jul 2024 420th abhishekg999 902 62 49ms 17 Sep 2024 420th lifthrasiir 🇰🇷 902 62 21ms 16 Nov 2024 420th Artemis21 🇬🇧 902 62 22ms 17 Jan 2025 420th lolgeny 902 62 20ms 22 Feb 2025 420th keelimeguy 🇺🇸 902 62 20ms 15 May 2025 420th DoubleUynn 902 62 22ms 25 Jun 2025 420th madeforlosers 902 62 22ms 21 days ago 446th kg583 🇺🇸 902 77 17ms 11 Mar 2026 447th edsrzf 🇳🇿 902 83 41ms 14 Jan 2025 447th kg583 🇺🇸 902 83 42ms 14 Feb 2025 449th MeWhenI 🇻🇦 901 63 209ms 5 May 2022 450th Kacarott 🇦🇺 901 79 121ms 13 Jun 2024 451st stefangimmillaro 901 92 132ms 24 Oct 2023 451st inverseLorentz 🇦🇺 901 92 129ms 27 May 2024 451st sean-niemann 🇺🇸 901 92 135ms 8 Jun 2025 451st ian-h-chamberlain 🇺🇸 901 92 136ms 23 Nov 2025 455th michael-pruglo 🇺🇦 901 94 62ms 5 Jul 2022 455th zygoloid 901 94 62ms 5 Aug 2024 455th AdrienHache 🇫🇷 901 94 60ms 27 Dec 2025 458th Lydxn 🇨🇦 900 64 181ms 1 Apr 2023 459th MeWhenI 🇻🇦 899 71 139ms 20 Aug 2024 460th Steffan153 🇫🇮 899 82 42ms 1 Apr 2023 460th sean-niemann 🇺🇸 899 82 42ms 12 Jul 2024 462nd Lydxn 🇨🇦 898 49 39ms 4 May 2022 462nd JayXon 🇺🇸 898 49 40ms 17 Oct 2022 462nd GrayJoKing 🇦🇺 898 49 44ms 15 Nov 2022 462nd radarek 🇵🇱 898 49 216ms 26 Aug 2025 466th Lydxn 🇨🇦 898 70 101ms 7 May 2022 467th m-tkach 🇺🇦 898 72 111ms 16 Oct 2022 467th GrayJoKing 🇦🇺 898 72 112ms 22 Oct 2022 467th emplv 🇱🇻 898 72 111ms 27 Oct 2022 467th sean-niemann 🇺🇸 898 72 126ms 7 Mar 2025 471st albanian-laundromat 🇺🇸 897 106 329ms 22 Dec 2025 472nd DialFrost 🇸🇬 896 74 16ms 22 Feb 2026 472nd Steffan153 🇫🇮 896 74 16ms 22 Feb 2026 472nd GrayJoKing 🇦🇺 896 74 17ms 22 Feb 2026 472nd GolfingSuccess 🇬🇷 896 74 20ms 24 Feb 2026 472nd snoozingnewt 🇨🇦 896 74 22ms 4 Mar 2026 472nd edsrzf 🇳🇿 896 74 16ms 9 Mar 2026 478th Lydxn 🇨🇦 895 69 6ms 12 Sep 2022 478th GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 478th btnlq 895 69 7ms 24 Sep 2022 478th trinityy-7 895 69 2ms 7 Aug 2025 482nd Steffan153 🇫🇮 894 67 125ms 18 Dec 2022 482nd Lydxn 🇨🇦 894 67 122ms 4 Feb 2023 482nd DialFrost 🇸🇬 894 67 110ms 17 Mar 2025 485th Lydxn 🇨🇦 894 72 353ms 16 Jul 2023 486th SirBogman 🇺🇸 893 50 408ms 5 May 2022 486th nwellnhof 🇩🇪 893 50 398ms 3 Jun 2022 486th Lydxn 🇨🇦 893 50 515ms 15 Aug 2022 486th Steffan153 🇫🇮 893 50 455ms 9 Aug 2024 490th NickTheEASDude 🇺🇸 893 76 6ms 7 May 2024 490th edsrzf 🇳🇿 893 76 6ms 23 Dec 2025 490th Shanethegamer 🇺🇸 893 76 5ms 23 Dec 2025 490th jared-hughes 893 76 5ms 24 Dec 2025 490th Waffle3z 893 76 5ms 26 Dec 2025 490th Blendi-Goose 893 76 5ms 6 Feb 2026 490th kTheLemon 893 76 5ms 7 Mar 2026 497th MichalMarsalek 🇨🇿 893 87 443ms 5 May 2022 497th Kloppermand 🇩🇰 893 87 436ms 7 Oct 2022 497th bwat2 893 87 464ms 6 Apr 2023 497th bpharaldsson 893 87 397ms 9 Feb 2026 First Prev 401–500 of 3,667 Next Last