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 estomagordo 🇳🇱 429 186 10ms 15 Jul 2025 802nd dokutan 425 132 302ms 3 Oct 2024 803rd MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 804th Arkadios200 417 196 98ms 21 Oct 2025 805th aksyristos 411 172 2ms 23 Nov 2025 806th denkyuu1 411 194 16ms 2 days ago 807th snoozingnewt 🇨🇦 411 267 28ms 18 Dec 2025 808th snoozingnewt 🇨🇦 406 313 40ms 2 Nov 2025 809th Mabeloid 🇳🇴 405 159 10ms 12 Oct 2024 810th snoozingnewt 🇨🇦 404 223 82ms 2 Nov 2025 811th dieggsy 400 247 18ms 10 Oct 2024 812th Ralac07 🇦🇺 397 162 12ms 3 Oct 2024 813th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 814th JOrE20 385 191 109ms 13 days ago 815th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 816th fischfood 384 176 5ms 22 Oct 2024 817th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 818th KatieLG 🇬🇧 375 218 108ms 21 Nov 2025 819th RobGLambert 374 232 1,019ms 8 Jun 2025 820th snoozingnewt 🇨🇦 370 267 13ms 2 Nov 2025 821st RedzGoose 🇦🇺 369 187 121ms 2 Oct 2024 822nd P1nk-P0nk 369 215 3ms 18 Oct 2024 823rd gautambp 366 218 12ms 24 Jun 2025 824th sciencejiho 358 197 2ms 11 Feb 2025 825th The-Wolfson 355 230 100ms 16 Dec 2024 826th Zhenyu-Bo 350 228 11ms 30 Jul 2025 827th EthanJantz 347 230 11ms 5 Sep 2025 828th RobGLambert 342 273 185ms 8 Jun 2025 829th Ernest1338 339 275 290ms 26 Oct 2024 830th noahhorlacher 337 191 11ms 7 Dec 2024 831st RobertBurs 336 237 10ms 22 Sep 2025 832nd TJK-S 331 241 11ms 25 Oct 2025 832nd NoneTheFewer 331 241 11ms 25 Dec 2025 834th JOrE20 312 389 56ms 4 Dec 2025 835th te-chnical 309 258 248ms 4 May 2025 836th snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 837th KatieLG 🇬🇧 299 290 2,116ms 1 Oct 2025 838th kasarino 294 240 2ms 2 days ago 839th KatieLG 🇬🇧 293 241 2ms 1 Oct 2025 840th ReterikHub 280 310 199ms 17 Jan 2025 841st Mikey-Beep 🇬🇧 273 349 14ms 12 Aug 2025 842nd MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 843rd arebbsba 269 296 11ms 9 Jan 2025 844th kasarino 267 299 11ms 46 hours ago 845th kasarino 258 373 45ms 2 days ago 846th benanlam 249 320 11ms 21 Dec 2025 847th Msleizak 🇫🇷 206 226 325ms 19 May 2025 848th theEsteemed 154 606 472ms 20 days ago 849th AidanWalter 148 540 10ms 1 Jan 2025 850th bignamehyp 120 667 11ms 14 Nov 2024 851st vkptimon 120 776 422ms 9 Jul 2025 852nd dokutan 61 2,475 116ms 18 Aug 2025 853rd iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 854th lyphyser 0 15 79ms 25 May 2025 855th 2bular 0 16 77ms 22 Mar 2025 856th darrenks 0 17 74ms 22 Mar 2025 857th Natanaelel 🇸🇪 0 18 75ms 23 Mar 2025 858th plcc0 0 19 88ms 7 days ago 859th namelessiw 0 21 150ms 19 Nov 2025 860th kg583 🇺🇸 0 25 271ms 8 Feb 2025 861st lyxal 🇦🇺 0 27 761ms 17 May 2025 862nd plcc0 0 30 97ms 9 days ago 863rd themoonisacheese 0 35 748ms 13 Jun 2025 864th ovs-code 🇩🇪 0 52 5ms 16 days ago 865th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 866th ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 867th AlephSquirrel 0 63 3ms 15 Jun 2025 868th DialFrost 🇸🇬 0 68 11ms 4 Dec 2025 869th chunes3 🇺🇸 0 69 7ms 13 Feb 2025 870th maweowo 🇩🇪 0 70 4ms 2 Oct 2025 871st evnu 0 73 5ms 12 Oct 2025 872nd commandz0 🇺🇸 0 74 3ms 10 Jan 2026 873rd ovs-code 🇩🇪 0 76 15ms 13 Jun 2025 874th sean-niemann 🇺🇸 0 80 59ms 29 Apr 2025 875th NicoBliss 0 84 9ms 11 Jan 2026 876th KatieLG 🇬🇧 0 89 5ms 10 Jan 2026 877th albanian-laundromat 0 123 2ms 4 Jun 2025 878th frankgraziano 0 129 7ms 2 days ago 879th dokutan 0 138 8ms 11 Jan 2026 880th dokutan 0 141 66ms 44 hours ago First 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