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 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 1st Lydxn 🇨🇦 1,000 82 432ms 6 May 2022 1st JayXon 🇺🇸 1,000 82 465ms 9 May 2022 3rd Irratix 🇳🇱 988 83 432ms 4 May 2022 3rd nwellnhof 🇩🇪 988 83 431ms 4 May 2022 3rd ScottHamper 988 83 493ms 5 May 2022 3rd Romain-1 🇫🇷 988 83 431ms 1 Jun 2022 3rd Gaddy 🇫🇷 988 83 502ms 1 Jun 2022 3rd 5quiwyrm 988 83 437ms 4 Sep 2022 3rd Betuaredead 988 83 483ms 5 Jan 2023 3rd Yewzir 🇧🇪 988 83 403ms 12 Feb 2023 3rd btnlq 988 83 433ms 9 Mar 2023 3rd Adix-null 🇱🇹 988 83 474ms 17 May 2023 3rd Matgc04 988 83 497ms 19 May 2023 3rd AdrienHache 🇫🇷 988 83 444ms 8 Jun 2023 3rd gblikas 988 83 449ms 23 Jul 2023 3rd KrausRaus 🇺🇸 988 83 448ms 31 Jul 2023 3rd namelessiw 988 83 422ms 9 Apr 2025 3rd dokutan 988 83 463ms 9 Apr 2025 3rd m-tkach 🇺🇦 988 83 427ms 10 Apr 2025 3rd DialFrost 🇸🇬 988 83 419ms 10 Apr 2025 3rd kylejcwu 988 83 435ms 19 Apr 2025 3rd Tyrant7 988 83 425ms 19 Apr 2025 3rd Yax42 🇫🇷 988 83 424ms 19 Apr 2025 3rd MeWhenI 🇻🇦 988 83 445ms 19 Jun 2025 3rd sean-niemann 🇺🇸 988 83 420ms 20 Jun 2025 3rd stefangimmillaro 988 83 391ms 20 Jun 2025 3rd tomh1012 988 83 429ms 28 Aug 2025 3rd fuzzylojik-golf 🇺🇸 988 83 427ms 8 Sep 2025 3rd CaedenHarper 🇨🇦 988 83 410ms 17 Oct 2025 3rd Flix7dev 🇧🇪 988 83 403ms 21 Oct 2025 3rd arcpolaris 988 83 427ms 13 Jan 2026 3rd amazingalek 🇳🇴 988 83 430ms 21 Jan 2026 3rd scpchicken 🇵🇼 988 83 404ms 9 hours ago 34th roavin 976 84 427ms 23 Jun 2022 34th tkr-sh 🇰🇵 976 84 457ms 20 Aug 2022 34th Nickmiste 976 84 443ms 9 Nov 2022 34th postie77 976 84 410ms 19 May 2023 34th ertz1ertz 976 84 419ms 13 Sep 2024 34th Grabnukebomb 976 84 387ms 13 Sep 2024 34th Shanethegamer 🇺🇸 976 84 443ms 9 Apr 2025 34th HumanoidCPU 976 84 410ms 10 Apr 2025 34th annaproxy 976 84 423ms 11 Apr 2025 34th Re-Adventures 🇮🇳 976 84 424ms 15 Apr 2025 34th janbehrens 🇩🇪 976 84 436ms 17 Apr 2025 45th arctouch-cristiannevianna 965 85 418ms 3 Apr 2023 45th Widgitty 965 85 419ms 1 Sep 2023 45th tomtheisen 🇺🇸 965 85 438ms 10 Apr 2025 48th krcs 🇵🇱 953 86 407ms 10 May 2022 48th billings7 🇬🇧 953 86 444ms 15 May 2022 48th revlayle 🇺🇸 953 86 444ms 7 Dec 2022 48th albanian-laundromat 🇺🇸 953 86 462ms 30 Sep 2025 52nd MichalMarsalek 🇨🇿 943 87 443ms 5 May 2022 52nd Kloppermand 🇩🇰 943 87 436ms 7 Oct 2022 52nd bwat2 943 87 464ms 6 Apr 2023 52nd bpharaldsson 943 87 442ms 9 Feb 2026 56th SiestaGuru 932 88 434ms 9 Jan 2023 56th rifatx 932 88 437ms 5 Jul 2024 56th kmathis22 932 88 412ms 25 Sep 2025 59th c0d3-4-F00d 🇩🇪 921 89 407ms 5 May 2022 59th fkantelberg 921 89 467ms 15 Jul 2023 59th bac0id 921 89 495ms 26 Sep 2023 59th TRexOnGit 921 89 387ms 16 Feb 2024 63rd deadp4nda 🇩🇪 911 90 412ms 26 Apr 2024 63rd 123mjb 911 90 422ms 23 Jun 2025 63rd michelebastione 🇮🇹 911 90 420ms 24 Aug 2025 63rd razvandmtr 🇷🇴 911 90 527ms 6 Nov 2025 67th eshilo-draper 901 91 425ms 4 Sep 2022 67th ericlangedijk 🇸🇮 901 91 437ms 23 May 2023 67th KatieLG 🇬🇧 901 91 413ms 30 Apr 2024 67th Mikey-Beep 🇬🇧 901 91 403ms 3 Sep 2024 71st bschorno 891 92 410ms 12 Oct 2022 71st ChrisTheisen 891 92 423ms 14 Dec 2022 71st kellantech 891 92 395ms 4 Jul 2023 71st Mezzofloat 891 92 417ms 26 Aug 2023 71st Maximizer02 891 92 428ms 1 Oct 2023 71st madeforlosers 891 92 414ms 21 Nov 2024 71st ChromaChroma 891 92 410ms 7 Oct 2025 71st snoozingnewt 🇨🇦 891 92 433ms 8 Oct 2025 79th p-vf 🇨🇭 882 93 406ms 24 Jun 2022 79th Smetalo 882 93 418ms 25 Aug 2022 1–80 of 119 Next Last