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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 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 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 9 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 412th m-tkach 🇺🇦 903 90 31ms 7 Dec 2023 413th edsrzf 🇳🇿 902 52 901ms 9 Mar 2026 414th Betuaredead 902 60 4ms 5 Jan 2023 414th Yewzir 🇧🇪 902 60 4ms 12 Feb 2023 414th Steffan153 🇫🇮 902 60 4ms 23 Feb 2023 414th GolfingSuccess 🇬🇷 902 60 4ms 16 Oct 2024 414th sean-niemann 🇺🇸 902 60 9ms 7 Mar 2025 419th shellbertt 🇨🇦 902 62 21ms 4 May 2022 419th ZakkkkAttackkkk 🇵🇭 902 62 21ms 5 May 2022 419th annaproxy 902 62 21ms 8 Jun 2022 419th bob-th 902 62 21ms 9 Jul 2022 419th btjones0 902 62 27ms 15 Jul 2022 419th tri1212 🇻🇳 902 62 21ms 18 Jul 2022 419th fredrik-bakke 🇳🇴 902 62 21ms 5 Oct 2022 419th jakobkordez 🇸🇮 902 62 19ms 19 Oct 2022 419th Fishron 902 62 20ms 29 Nov 2022 419th KatieLG 🇬🇧 902 62 24ms 11 Dec 2022 419th ItsMeNoobieboy 902 62 19ms 20 Dec 2022 419th firegene 🇮🇪 902 62 21ms 3 Jan 2023 419th ljweel 902 62 20ms 13 Feb 2023 419th 2011-Chan-Ethan 902 62 21ms 9 Jul 2023 419th elgan65536 🇺🇸 902 62 23ms 18 Nov 2023 419th Dataen 902 62 19ms 16 Jan 2024 419th Yewzir 🇧🇪 902 62 48ms 5 Apr 2024 419th cuboids 902 62 21ms 11 Jul 2024 419th wuzekai518 902 62 25ms 26 Jul 2024 419th abhishekg999 902 62 49ms 17 Sep 2024 419th lifthrasiir 🇰🇷 902 62 21ms 16 Nov 2024 419th Artemis21 🇬🇧 902 62 22ms 17 Jan 2025 419th lolgeny 902 62 20ms 22 Feb 2025 419th keelimeguy 🇺🇸 902 62 20ms 15 May 2025 419th DoubleUynn 902 62 22ms 25 Jun 2025 419th madeforlosers 902 62 22ms 20 days ago 445th kg583 🇺🇸 902 77 17ms 11 Mar 2026 446th edsrzf 🇳🇿 902 83 41ms 14 Jan 2025 446th kg583 🇺🇸 902 83 42ms 14 Feb 2025 448th Kacarott 🇦🇺 901 79 121ms 13 Jun 2024 449th stefangimmillaro 901 92 132ms 24 Oct 2023 449th inverseLorentz 🇦🇺 901 92 129ms 27 May 2024 449th sean-niemann 🇺🇸 901 92 135ms 8 Jun 2025 449th ian-h-chamberlain 🇺🇸 901 92 136ms 23 Nov 2025 453rd michael-pruglo 🇺🇦 901 94 62ms 5 Jul 2022 453rd zygoloid 901 94 62ms 5 Aug 2024 453rd AdrienHache 🇫🇷 901 94 60ms 27 Dec 2025 456th Lydxn 🇨🇦 900 64 181ms 1 Apr 2023 457th MeWhenI 🇻🇦 899 63 209ms 5 May 2022 458th MeWhenI 🇻🇦 899 71 139ms 20 Aug 2024 459th Steffan153 🇫🇮 899 82 42ms 1 Apr 2023 459th sean-niemann 🇺🇸 899 82 42ms 12 Jul 2024 461st Lydxn 🇨🇦 898 49 39ms 4 May 2022 461st JayXon 🇺🇸 898 49 40ms 17 Oct 2022 461st GrayJoKing 🇦🇺 898 49 44ms 15 Nov 2022 461st radarek 🇵🇱 898 49 216ms 26 Aug 2025 465th Lydxn 🇨🇦 898 70 101ms 7 May 2022 466th m-tkach 🇺🇦 898 72 111ms 16 Oct 2022 466th GrayJoKing 🇦🇺 898 72 112ms 22 Oct 2022 466th emplv 🇱🇻 898 72 111ms 27 Oct 2022 466th sean-niemann 🇺🇸 898 72 126ms 7 Mar 2025 470th albanian-laundromat 🇺🇸 897 106 329ms 22 Dec 2025 471st DialFrost 🇸🇬 896 74 16ms 22 Feb 2026 471st Steffan153 🇫🇮 896 74 16ms 22 Feb 2026 471st GrayJoKing 🇦🇺 896 74 17ms 22 Feb 2026 471st GolfingSuccess 🇬🇷 896 74 20ms 24 Feb 2026 471st snoozingnewt 🇨🇦 896 74 22ms 4 Mar 2026 471st edsrzf 🇳🇿 896 74 16ms 9 Mar 2026 477th Lydxn 🇨🇦 895 69 6ms 12 Sep 2022 477th GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 477th btnlq 895 69 7ms 24 Sep 2022 477th trinityy-7 895 69 2ms 7 Aug 2025 481st Steffan153 🇫🇮 894 67 125ms 18 Dec 2022 481st Lydxn 🇨🇦 894 67 122ms 4 Feb 2023 481st DialFrost 🇸🇬 894 67 110ms 17 Mar 2025 484th Lydxn 🇨🇦 894 72 353ms 16 Jul 2023 485th SirBogman 🇺🇸 893 50 408ms 5 May 2022 485th nwellnhof 🇩🇪 893 50 398ms 3 Jun 2022 485th Lydxn 🇨🇦 893 50 515ms 15 Aug 2022 485th Steffan153 🇫🇮 893 50 455ms 9 Aug 2024 489th NickTheEASDude 🇺🇸 893 76 6ms 7 May 2024 489th edsrzf 🇳🇿 893 76 6ms 23 Dec 2025 489th Shanethegamer 🇺🇸 893 76 5ms 23 Dec 2025 489th jared-hughes 893 76 5ms 24 Dec 2025 489th Waffle3z 893 76 5ms 26 Dec 2025 489th Blendi-Goose 893 76 5ms 6 Feb 2026 489th kTheLemon 893 76 5ms 7 Mar 2026 496th MichalMarsalek 🇨🇿 893 87 443ms 5 May 2022 496th Kloppermand 🇩🇰 893 87 436ms 7 Oct 2022 496th bwat2 893 87 464ms 6 Apr 2023 496th bpharaldsson 893 87 397ms 9 Feb 2026 500th GrayJoKing 🇦🇺 893 91 30ms 19 Jan 2023 First Prev 401–500 of 3,664 Next Last