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 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 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 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 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 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 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 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 Bytes Time Submitted 801st MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 802nd Arkadios200 417 196 98ms 21 Oct 2025 803rd aksyristos 410 172 2ms 23 Nov 2025 804th snoozingnewt 🇨🇦 406 313 40ms 2 Nov 2025 805th Mabeloid 🇳🇴 405 159 9ms 12 Oct 2024 806th snoozingnewt 🇨🇦 404 223 82ms 2 Nov 2025 807th dieggsy 400 247 18ms 10 Oct 2024 808th Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 809th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 810th JOrE20 385 191 109ms 7 days ago 811th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 812th fischfood 384 176 5ms 22 Oct 2024 813th c0d3-4-F00d 🇩🇪 383 184 2ms 9 Jan 2025 814th KatieLG 🇬🇧 375 218 108ms 21 Nov 2025 815th RobGLambert 373 232 1,019ms 8 Jun 2025 816th snoozingnewt 🇨🇦 370 267 13ms 2 Nov 2025 817th RedzGoose 🇦🇺 369 187 114ms 2 Oct 2024 818th P1nk-P0nk 368 215 3ms 18 Oct 2024 819th gautambp 366 218 12ms 24 Jun 2025 820th sciencejiho 358 197 2ms 11 Feb 2025 821st The-Wolfson 355 230 100ms 16 Dec 2024 822nd Zhenyu-Bo 350 228 11ms 30 Jul 2025 823rd EthanJantz 347 230 11ms 5 Sep 2025 824th RobGLambert 342 273 185ms 8 Jun 2025 825th Ernest1338 339 275 290ms 26 Oct 2024 826th noahhorlacher 337 191 10ms 7 Dec 2024 827th RobertBurs 336 237 10ms 22 Sep 2025 828th TJK-S 331 241 11ms 25 Oct 2025 828th NoneTheFewer 331 241 11ms 25 Dec 2025 830th JOrE20 312 389 56ms 4 Dec 2025 831st te-chnical 309 258 248ms 4 May 2025 832nd snoozingnewt 🇨🇦 303 200 3ms 2 Nov 2025 833rd KatieLG 🇬🇧 299 290 2,116ms 1 Oct 2025 834th KatieLG 🇬🇧 293 241 2ms 1 Oct 2025 835th ReterikHub 279 310 199ms 17 Jan 2025 836th Mikey-Beep 🇬🇧 273 349 14ms 12 Aug 2025 837th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 838th arebbsba 269 296 11ms 9 Jan 2025 839th benanlam 249 320 11ms 21 Dec 2025 840th Msleizak 🇫🇷 206 226 325ms 19 May 2025 841st theEsteemed 154 606 472ms 14 days ago 842nd AidanWalter 148 540 10ms 1 Jan 2025 843rd vkptimon 120 776 422ms 9 Jul 2025 844th bignamehyp 119 667 11ms 14 Nov 2024 845th dokutan 61 2,475 116ms 18 Aug 2025 846th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 847th lyphyser 0 15 74ms 25 May 2025 848th 2bular 0 16 76ms 22 Mar 2025 849th darrenks 0 17 76ms 22 Mar 2025 850th Natanaelel 🇸🇪 0 18 75ms 23 Mar 2025 851st plcc0 0 19 78ms 47 hours ago 852nd namelessiw 0 21 150ms 19 Nov 2025 853rd kg583 🇺🇸 0 25 271ms 8 Feb 2025 854th lyxal 🇦🇺 0 27 761ms 17 May 2025 855th plcc0 0 30 97ms 3 days ago 856th themoonisacheese 0 35 748ms 13 Jun 2025 857th ovs-code 🇩🇪 0 52 3ms 10 days ago 858th GrayJoKing 🇦🇺 0 55 4ms 13 Jul 2025 859th ovs-code 🇩🇪 0 58 2ms 13 Jul 2025 860th AlephSquirrel 0 63 3ms 15 Jun 2025 861st DialFrost 🇸🇬 0 68 11ms 4 Dec 2025 862nd chunes3 🇺🇸 0 69 7ms 13 Feb 2025 863rd maweowo 🇩🇪 0 70 4ms 2 Oct 2025 864th evnu 0 73 5ms 12 Oct 2025 865th commandz0 🇺🇸 0 74 4ms 24 days ago 866th ovs-code 🇩🇪 0 76 15ms 13 Jun 2025 867th sean-niemann 🇺🇸 0 80 59ms 29 Apr 2025 868th NicoBliss 0 84 9ms 24 days ago 869th KatieLG 🇬🇧 0 89 5ms 24 days ago 870th albanian-laundromat 0 123 2ms 4 Jun 2025 871st dokutan 0 138 8ms 24 days ago 872nd edsrzf 🇳🇿 0 142 183ms 24 Jul 2025 873rd MatthewF19 0 192 113ms 17 May 2025 874th dokutan 0 219 60ms 28 Jun 2025 First Prev 801–874 of 874