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 Lily 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 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 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 JOrE20 434 136 1,021ms 7 Dec 2025 802nd KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 803rd aksyristos 433 184 24ms 15 Nov 2024 804th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 805th snoozingnewt 🇨🇦 431 111 38ms 2 Nov 2025 806th estomagordo 🇳🇱 429 186 10ms 15 Jul 2025 807th dokutan 425 132 301ms 3 Oct 2024 808th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 809th Arkadios200 417 196 98ms 21 Oct 2025 810th aksyristos 411 172 2ms 23 Nov 2025 811th denkyuu1 411 194 16ms 3 days ago 812th snoozingnewt 🇨🇦 411 267 28ms 18 Dec 2025 813th snoozingnewt 🇨🇦 406 313 40ms 2 Nov 2025 814th Mabeloid 🇳🇴 405 159 10ms 12 Oct 2024 815th snoozingnewt 🇨🇦 404 223 82ms 2 Nov 2025 816th dieggsy 400 247 18ms 10 Oct 2024 817th Ralac07 🇦🇺 397 162 12ms 3 Oct 2024 818th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 819th fischfood 385 176 5ms 22 Oct 2024 820th JOrE20 385 191 109ms 14 days ago 821st ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 822nd c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 823rd KatieLG 🇬🇧 375 218 108ms 21 Nov 2025 824th RobGLambert 375 232 1,019ms 8 Jun 2025 825th snoozingnewt 🇨🇦 370 267 13ms 2 Nov 2025 826th RedzGoose 🇦🇺 369 187 121ms 2 Oct 2024 827th P1nk-P0nk 369 215 3ms 18 Oct 2024 828th gautambp 366 218 12ms 24 Jun 2025 829th sciencejiho 358 197 2ms 11 Feb 2025 830th The-Wolfson 355 230 100ms 16 Dec 2024 831st Zhenyu-Bo 350 228 11ms 30 Jul 2025 832nd EthanJantz 347 230 11ms 5 Sep 2025 833rd RobGLambert 342 273 185ms 8 Jun 2025 834th Ernest1338 339 275 290ms 26 Oct 2024 835th noahhorlacher 337 191 11ms 7 Dec 2024 836th RobertBurs 336 237 10ms 22 Sep 2025 837th TJK-S 331 241 11ms 25 Oct 2025 837th NoneTheFewer 331 241 11ms 25 Dec 2025 839th JOrE20 312 389 56ms 4 Dec 2025 840th te-chnical 309 258 248ms 4 May 2025 841st snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 842nd KatieLG 🇬🇧 300 290 2,116ms 1 Oct 2025 843rd kasarino 294 240 2ms 3 days ago 844th KatieLG 🇬🇧 293 241 2ms 1 Oct 2025 845th ReterikHub 280 310 199ms 17 Jan 2025 846th Mikey-Beep 🇬🇧 273 349 14ms 12 Aug 2025 847th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 848th arebbsba 269 296 11ms 9 Jan 2025 849th kasarino 267 299 11ms 2 days ago 850th kasarino 258 373 45ms 2 days ago 851st benanlam 249 320 11ms 21 Dec 2025 852nd Msleizak 🇫🇷 206 226 325ms 19 May 2025 853rd theEsteemed 154 606 472ms 21 days ago 854th AidanWalter 148 540 10ms 1 Jan 2025 855th bignamehyp 120 667 11ms 14 Nov 2024 856th vkptimon 120 776 422ms 9 Jul 2025 857th dokutan 61 2,475 116ms 18 Aug 2025 858th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 859th lyphyser 0 15 79ms 25 May 2025 860th 2bular 0 16 77ms 22 Mar 2025 861st darrenks 0 17 74ms 22 Mar 2025 862nd Natanaelel 🇸🇪 0 18 75ms 23 Mar 2025 863rd plcc0 0 19 88ms 8 days ago 864th namelessiw 0 21 150ms 19 Nov 2025 865th kg583 🇺🇸 0 25 271ms 8 Feb 2025 866th lyxal 🇦🇺 0 27 761ms 17 May 2025 867th plcc0 0 30 97ms 10 days ago 868th themoonisacheese 0 35 748ms 13 Jun 2025 869th ovs-code 🇩🇪 0 52 5ms 17 days ago 870th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 871st ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 872nd AlephSquirrel 0 63 3ms 15 Jun 2025 873rd DialFrost 🇸🇬 0 68 11ms 4 Dec 2025 874th chunes3 🇺🇸 0 69 7ms 13 Feb 2025 875th maweowo 🇩🇪 0 70 4ms 2 Oct 2025 876th evnu 0 73 5ms 12 Oct 2025 877th commandz0 🇺🇸 0 74 3ms 10 Jan 2026 878th ovs-code 🇩🇪 0 76 15ms 13 Jun 2025 879th sean-niemann 🇺🇸 0 80 59ms 29 Apr 2025 880th NicoBliss 0 84 9ms 11 Jan 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