ISBN in C# in bytes. 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 Bytes Time Submitted 1st btnlq 1,000 82 509ms 11 Mar 2023 1st JayXon 🇺🇸 1,000 82 499ms 11 Mar 2023 1st Lydxn 🇨🇦 1,000 82 523ms 19 May 2023 1st nwellnhof 🇩🇪 1,000 82 503ms 27 Jun 2023 1st tomtheisen 🇺🇸 1,000 82 491ms 5 Feb 2025 1st AdrienHache 🇫🇷 1,000 82 509ms 23 Jul 2025 7th namelessiw 988 83 503ms 1 Aug 2025 8th Yax42 🇫🇷 976 84 498ms 31 Jan 2025 9th Steffan153 🇫🇮 943 87 497ms 21 Aug 2024 10th MeWhenI 🇻🇦 911 90 506ms 9 Aug 2023 11th Shanethegamer 🇺🇸 891 92 458ms 26 Mar 2024 12th prplz 🇦🇺 882 93 466ms 18 Jan 2022 12th hemphen 882 93 457ms 28 Aug 2022 12th feberhard 882 93 473ms 6 Apr 2023 12th sean-niemann 🇺🇸 882 93 440ms 19 Apr 2025 16th annaproxy 872 94 514ms 19 Mar 2022 17th ScottHamper 854 96 447ms 26 Feb 2022 17th stefangimmillaro 854 96 467ms 5 Jan 2023 17th bojernico 854 96 466ms 6 Apr 2023 20th tomh1012 837 98 499ms 31 Jan 2022 20th pkim 837 98 483ms 6 Apr 2023 20th danielxbauer 837 98 463ms 6 Apr 2023 20th meinsiedler 837 98 453ms 6 Apr 2023 20th postie77 837 98 490ms 8 May 2023 20th arcpolaris 837 98 423ms 8 days ago 26th Skleni 828 99 469ms 6 Apr 2023 27th billings7 🇬🇧 781 105 450ms 12 Nov 2023 27th MiffOttah 781 105 457ms 28 Nov 2024 29th ericlangedijk 🇸🇮 774 106 469ms 19 Mar 2022 30th revlayle 🇺🇸 759 108 447ms 20 Jan 2022 30th primo-ppcg 🇹🇭 759 108 455ms 20 Apr 2022 32nd Yewzir 🇧🇪 732 112 431ms 1 Dec 2023 32nd michelebastione 🇮🇹 732 112 472ms 20 Sep 2025 34th fabianrieder 719 114 488ms 6 Apr 2023 35th janbehrens 🇩🇪 713 115 445ms 23 Jun 2023 36th roavin 707 116 459ms 23 Jun 2022 36th hamhub7 707 116 451ms 9 Aug 2022 36th bac0id 707 116 451ms 22 Sep 2023 36th CaedenHarper 🇨🇦 707 116 443ms 16 Oct 2025 40th HumanoidCPU 695 118 466ms 3 Mar 2025 41st m-tkach 🇺🇦 678 121 457ms 10 Jan 2022 41st arctouch-cristiannevianna 678 121 445ms 1 Mar 2024 41st acer-xq 678 121 456ms 5 Aug 2024 44th rifatx 667 123 426ms 14 Jul 2024 45th Mikey-Beep 🇬🇧 646 127 477ms 4 Sep 2024 46th p-vf 🇨🇭 636 129 462ms 16 Jul 2022 46th flekAI 636 129 426ms 3 days ago 48th amazingalek 🇳🇴 631 130 458ms 30 Dec 2025 48th mwarvik 🇳🇴 631 130 457ms 31 Dec 2025 50th alicethecatwhisperermeow 617 133 463ms 7 Aug 2024 51st adotagarwal 603 136 496ms 4 Mar 2023 51st aliakseikalosha 603 136 449ms 7 Oct 2024 51st snoozingnewt 🇨🇦 603 136 458ms 28 Sep 2025 54th Adix-null 🇱🇹 599 137 465ms 10 Nov 2025 55th codewrite 🇬🇧 573 143 466ms 4 Jan 2026 56th malworthy 566 145 488ms 9 Aug 2024 57th msbranicky 550 149 502ms 22 Aug 2023 58th krcs 🇵🇱 532 154 476ms 10 May 2022 58th tobiasberei 532 154 504ms 6 Apr 2023 60th KatieLG 🇬🇧 474 173 443ms 15 Jan 2022 61st gblikas 432 190 418ms 21 Aug 2024 62nd memmaptensor 🇹🇭 410 200 502ms 21 Jan 2022 63rd jusaka 402 204 457ms 20 hours ago 64th 0xDomi 380 216 434ms 6 Apr 2023 65th chrispewebb 259 317 454ms 28 Nov 2025 66th Trickermand 243 337 431ms 12 Dec 2022 67th KatieLG-Transpiler 🇬🇧 193 425 448ms 4 Jul 2022 1–67 of 67
