Card Number Validation in all languages 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 881st snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 882nd KatieLG 🇬🇧 300 290 2,477ms 1 Oct 2025 883rd kasarino 295 240 2ms 8 Feb 2026 884th KatieLG 🇬🇧 294 241 2ms 1 Oct 2025 885th fantaize 284 330 201ms 24 days ago 886th ReterikHub 280 310 209ms 17 Jan 2025 887th Mikey-Beep 🇬🇧 273 349 16ms 12 Aug 2025 888th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 889th arebbsba 269 296 11ms 9 Jan 2025 890th kasarino 267 299 11ms 8 Feb 2026 891st kasarino 258 373 44ms 8 Feb 2026 892nd benanlam 249 320 10ms 21 Dec 2025 893rd Msleizak 🇫🇷 206 226 280ms 19 May 2025 894th theEsteemed 154 606 472ms 20 Jan 2026 895th AidanWalter 148 540 10ms 1 Jan 2025 896th bignamehyp 120 667 10ms 14 Nov 2024 897th vkptimon 120 776 422ms 9 Jul 2025 898th dokutan 61 2,475 116ms 18 Aug 2025 899th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 900th lyphyser 0 15 36ms 25 May 2025 900th 2bular 0 15 35ms 14 Feb 2026 900th Natanaelel 🇸🇪 0 15 36ms 17 Feb 2026 903rd darrenks 🇺🇸 0 16 36ms 14 Feb 2026 904th plcc0 0 18 42ms 14 Feb 2026 905th namelessiw 0 21 150ms 19 Nov 2025 906th kg583 🇺🇸 0 25 310ms 8 Feb 2025 907th lyxal 🇦🇺 0 27 948ms 17 May 2025 908th plcc0 0 30 97ms 31 Jan 2026 909th themoonisacheese 0 35 1,117ms 13 Jun 2025 909th jshholland 0 35 850ms 19 Feb 2026 911th ovs-code 🇩🇪 0 52 4ms 24 Jan 2026 912th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 913th ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 914th AlephSquirrel 0 63 3ms 15 Jun 2025 915th DialFrost 🇸🇬 0 68 11ms 4 Dec 2025 916th chunes3 🇺🇸 0 69 7ms 13 Feb 2025 917th maweowo 🇩🇪 0 70 4ms 2 Oct 2025 918th evnu 0 73 5ms 12 Oct 2025 919th commandz0 🇺🇸 0 74 3ms 10 Jan 2026 920th ovs-code 🇩🇪 0 76 15ms 13 Jun 2025 921st sean-niemann 🇺🇸 0 80 59ms 29 Apr 2025 922nd NicoBliss 0 84 9ms 11 Jan 2026 923rd KatieLG 🇬🇧 0 89 4ms 10 Jan 2026 924th dokutan 0 110 63ms 21 days ago 925th albanian-laundromat 0 123 2ms 4 Jun 2025 926th dokutan 0 138 8ms 11 Jan 2026 927th edsrzf 🇳🇿 0 142 186ms 24 Jul 2025 928th MatthewF19 0 192 108ms 17 May 2025 929th dokutan 0 219 59ms 28 Jun 2025 First Prev 881–929 of 929
