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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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 448th ian-h-chamberlain 🇺🇸 900 92 127ms 7 days ago 452nd MeWhenI 🇻🇦 899 63 206ms 5 May 2022 453rd Shanethegamer 🇺🇸 899 72 4ms 4 May 2022 453rd jared-hughes 899 72 4ms 4 May 2022 453rd Waffle3z 899 72 7ms 5 May 2022 453rd Blendi-Goose 899 72 6ms 16 Mar 2025 453rd edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 453rd sean-niemann 🇺🇸 899 72 6ms 16 Oct 2025 459th michael-pruglo 🇺🇦 899 94 52ms 5 Jul 2022 459th zygoloid 899 94 51ms 5 Aug 2024 461st shinh 898 52 42ms 29 Jun 2022 461st MeWhenI 🇻🇦 898 52 84ms 25 Jul 2023 463rd Lydxn 🇨🇦 898 70 88ms 7 May 2022 464th MeWhenI 🇻🇦 898 71 102ms 20 Aug 2024 465th m-tkach 🇺🇦 898 72 104ms 16 Oct 2022 465th GrayJoKing 🇦🇺 898 72 114ms 22 Oct 2022 465th emplv 🇱🇻 898 72 105ms 27 Oct 2022 465th sean-niemann 🇺🇸 898 72 124ms 7 Mar 2025 469th Steffan153 🇫🇮 897 82 44ms 1 Apr 2023 469th sean-niemann 🇺🇸 897 82 43ms 12 Jul 2024 471st sean-niemann 🇺🇸 897 108 261ms 25 May 2024 471st GolfingSuccess 🇬🇷 897 108 252ms 6 Sep 2025 473rd Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 473rd GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 473rd btnlq 895 69 7ms 24 Sep 2022 476th trinityy-7 894 69 2ms 7 Aug 2025 477th SirBogman 🇺🇸 892 50 407ms 5 May 2022 477th nwellnhof 🇩🇪 892 50 402ms 3 Jun 2022 477th Lydxn 🇨🇦 892 50 413ms 15 Aug 2022 477th Steffan153 🇫🇮 892 50 390ms 9 Aug 2024 481st edsrzf 🇳🇿 892 78 12ms 26 Oct 2024 481st kg583 🇺🇸 892 78 11ms 25 Sep 2025 483rd MichalMarsalek 🇨🇿 892 87 324ms 5 May 2022 483rd Kloppermand 🇩🇰 892 87 326ms 7 Oct 2022 483rd bwat2 892 87 317ms 6 Apr 2023 486th GrayJoKing 🇦🇺 892 91 31ms 19 Jan 2023 487th Lydxn 🇨🇦 891 72 302ms 16 Jul 2023 488th oeb25 891 93 128ms 16 May 2022 488th snobee 🇨🇦 891 93 130ms 8 Dec 2022 488th logvp 891 93 123ms 2 Jan 2024 488th elgan65536 891 93 124ms 5 Mar 2024 488th smartiel 891 93 120ms 12 Aug 2024 488th trist224 🇫🇷 891 93 126ms 12 Aug 2024 488th nullie 891 93 126ms 19 Dec 2024 488th lolgeny 891 93 126ms 22 Feb 2025 496th p-zubieta 890 48 259ms 6 Mar 2024 497th Ripick 890 73 121ms 8 May 2023 498th Steffan153 🇫🇮 890 80 24ms 11 Dec 2023 499th GolfingSuccess 🇬🇷 890 95 52ms 5 May 2022 499th Alex-x90 🇺🇸 890 95 53ms 4 Dec 2022 499th Mandrzejy 🇵🇱 890 95 53ms 22 Mar 2024 502nd Steffan153 🇫🇮 889 80 40ms 15 Nov 2022 502nd error256 889 80 130ms 8 Apr 2025 504th MeWhenI 🇻🇦 889 109 255ms 9 Feb 2023 505th KatieLG 🇬🇧 888 60 10ms 4 May 2022 505th ScottHamper 888 60 10ms 5 May 2022 505th Re-Adventures 🇮🇳 888 60 10ms 5 May 2022 505th 0x24a537r9 888 60 10ms 29 Jul 2022 505th stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 505th eranws 888 60 10ms 10 Sep 2022 505th GeorgeStechman 🇬🇧 888 60 10ms 26 Sep 2022 505th BloodStormKnight 888 60 10ms 15 Oct 2022 505th dzshn 888 60 9ms 3 Dec 2022 505th biocommando 🇫🇮 888 60 10ms 20 Dec 2022 505th Betuaredead 888 60 9ms 5 Jan 2023 505th piano-miles 888 60 10ms 16 Jan 2023 505th Yewzir 🇧🇪 888 60 10ms 12 Feb 2023 505th shellbertt 🇨🇦 888 60 10ms 26 Feb 2023 505th zakariamouhid 888 60 9ms 20 May 2023 505th raphaelimahorn 888 60 10ms 23 Aug 2023 505th jbt 888 60 11ms 25 Dec 2023 505th olleicua 🇺🇸 888 60 10ms 15 Feb 2024 505th HumanoidCPU 888 60 10ms 3 May 2024 505th dokutan 888 60 9ms 13 Aug 2024 505th LostSyntax21 🇬🇧 888 60 10ms 10 Sep 2024 First Prev 451–525 of 3,471 Next Last