Collatz in C# 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 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 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 Apéry’s Constant Binary Lambda Calculus 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers 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 ArkScript 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 ArkScript 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 Calendar 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 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 Apéry’s Constant Binary Lambda Calculus 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 1st Lydxn 🇨🇦 1,000 82 446ms 6 May 2022 1st JayXon 🇺🇸 1,000 82 383ms 9 May 2022 3rd Irratix 🇳🇱 988 83 446ms 4 May 2022 3rd nwellnhof 🇩🇪 988 83 433ms 4 May 2022 3rd ScottHamper 988 83 405ms 5 May 2022 3rd Romain-1 🇫🇷 988 83 419ms 1 Jun 2022 3rd Gaddy 🇫🇷 988 83 423ms 1 Jun 2022 3rd 5quiwyrm 988 83 403ms 4 Sep 2022 3rd Betuaredead 988 83 426ms 5 Jan 2023 3rd Yewzir 🇧🇪 988 83 428ms 12 Feb 2023 3rd btnlq 988 83 427ms 9 Mar 2023 3rd Adix-null 🇱🇹 988 83 445ms 17 May 2023 3rd Matgc04 988 83 368ms 19 May 2023 3rd AdrienHache 🇫🇷 988 83 360ms 8 Jun 2023 3rd gblikas 988 83 386ms 23 Jul 2023 3rd KrausRaus 🇺🇸 988 83 414ms 31 Jul 2023 3rd namelessiw 988 83 435ms 9 Apr 2025 3rd dokutan 988 83 414ms 9 Apr 2025 3rd m-tkach 🇺🇦 988 83 405ms 10 Apr 2025 3rd DialFrost 🇸🇬 988 83 423ms 10 Apr 2025 3rd Pecanolith 988 83 414ms 19 Apr 2025 3rd Tyrant7 988 83 415ms 19 Apr 2025 3rd Yax42 🇫🇷 988 83 403ms 19 Apr 2025 3rd MeWhenI 🇻🇦 988 83 412ms 19 Jun 2025 3rd sean-niemann 🇺🇸 988 83 427ms 20 Jun 2025 3rd stefangimmillaro 988 83 432ms 20 Jun 2025 3rd tomh1012 988 83 523ms 28 Aug 2025 3rd fuzzylojik-golf 🇺🇸 988 83 400ms 8 Sep 2025 3rd CaedenHarper 🇨🇦 988 83 417ms 17 Oct 2025 3rd Flix7dev 🇧🇪 988 83 385ms 21 Oct 2025 3rd arcpolaris 988 83 426ms 36 hours ago 32nd roavin 976 84 407ms 23 Jun 2022 32nd tkr-sh 🇰🇵 976 84 407ms 20 Aug 2022 32nd Nickmiste 976 84 385ms 9 Nov 2022 32nd postie77 976 84 404ms 19 May 2023 32nd ertz1ertz 976 84 416ms 13 Sep 2024 32nd Grabnukebomb 976 84 391ms 13 Sep 2024 32nd Shanethegamer 🇺🇸 976 84 425ms 9 Apr 2025 32nd HumanoidCPU 976 84 423ms 10 Apr 2025 32nd annaproxy 976 84 406ms 11 Apr 2025 32nd Re-Adventures 🇮🇳 976 84 402ms 15 Apr 2025 32nd janbehrens 🇩🇪 976 84 417ms 17 Apr 2025 43rd arctouch-cristiannevianna 965 85 391ms 3 Apr 2023 43rd Widgitty 965 85 403ms 1 Sep 2023 43rd tomtheisen 🇺🇸 965 85 422ms 10 Apr 2025 46th krcs 🇵🇱 953 86 394ms 10 May 2022 46th billings7 🇬🇧 953 86 418ms 15 May 2022 46th revlayle 🇺🇸 953 86 416ms 7 Dec 2022 46th albanian-laundromat 953 86 412ms 30 Sep 2025 50th MichalMarsalek 🇨🇿 943 87 436ms 5 May 2022 50th Kloppermand 🇩🇰 943 87 414ms 7 Oct 2022 50th bwat2 943 87 397ms 6 Apr 2023 50th amazingalek 943 87 376ms 20 days ago 54th SiestaGuru 932 88 411ms 9 Jan 2023 54th rifatx 932 88 390ms 5 Jul 2024 54th kmathis22 932 88 398ms 25 Sep 2025 57th c0d3-4-F00d 🇩🇪 921 89 368ms 5 May 2022 57th fkantelberg 921 89 407ms 15 Jul 2023 57th bac0id 921 89 374ms 26 Sep 2023 57th TRexOnGit 921 89 432ms 16 Feb 2024 61st deadp4nda 🇩🇪 911 90 390ms 26 Apr 2024 61st 123mjb 911 90 430ms 23 Jun 2025 61st michelebastione 🇮🇹 911 90 418ms 24 Aug 2025 61st razvandmtr 🇷🇴 911 90 403ms 6 Nov 2025 65th eshilo-draper 901 91 396ms 4 Sep 2022 65th ericlangedijk 🇸🇮 901 91 428ms 23 May 2023 65th KatieLG 🇬🇧 901 91 419ms 30 Apr 2024 65th Mikey-Beep 🇬🇧 901 91 388ms 3 Sep 2024 69th bschorno 891 92 395ms 12 Oct 2022 69th ChrisTheisen 891 92 371ms 14 Dec 2022 69th kellantech 891 92 408ms 4 Jul 2023 69th Mezzofloat 891 92 405ms 26 Aug 2023 69th Maximizer02 891 92 419ms 1 Oct 2023 69th madeforlosers 891 92 452ms 21 Nov 2024 69th ChromaChroma 891 92 407ms 7 Oct 2025 69th snoozingnewt 🇨🇦 891 92 422ms 8 Oct 2025 77th p-vf 🇨🇭 882 93 418ms 24 Jun 2022 77th Smetalo 882 93 401ms 25 Aug 2022 77th malworthy 882 93 407ms 19 Aug 2024 80th trinityy-7 872 94 413ms 7 Mar 2024 1–80 of 115 Next Last