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 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 Multitap Input 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 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 Multitap Input 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 Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 802nd snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 803rd ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 804th fischfood 384 176 5ms 22 Oct 2024 805th c0d3-4-F00d 🇩🇪 383 184 2ms 9 Jan 2025 806th snoozingnewt 🇨🇦 376 267 13ms 2 Nov 2025 807th KatieLG 🇬🇧 375 218 108ms 21 Nov 2025 808th RobGLambert 372 232 1,019ms 8 Jun 2025 809th RedzGoose 🇦🇺 369 187 114ms 2 Oct 2024 810th P1nk-P0nk 368 215 3ms 18 Oct 2024 811th gautambp 366 218 11ms 24 Jun 2025 812th sciencejiho 358 197 2ms 11 Feb 2025 813th The-Wolfson 355 230 100ms 16 Dec 2024 814th JOrE20 🇺🇸 354 208 156ms 7 Dec 2025 815th Zhenyu-Bo 350 228 10ms 30 Jul 2025 816th EthanJantz 346 230 10ms 5 Sep 2025 817th RobGLambert 342 273 183ms 8 Jun 2025 818th Ernest1338 339 275 265ms 26 Oct 2024 819th noahhorlacher 337 191 10ms 7 Dec 2024 820th RobertBurs 336 237 10ms 22 Sep 2025 821st TJK-S 331 241 10ms 25 Oct 2025 821st NoneTheFewer 331 241 11ms 26 days ago 823rd JOrE20 🇺🇸 312 389 56ms 4 Dec 2025 824th te-chnical 309 258 215ms 4 May 2025 825th snoozingnewt 🇨🇦 303 200 3ms 2 Nov 2025 826th KatieLG 🇬🇧 298 290 2,116ms 1 Oct 2025 827th KatieLG 🇬🇧 292 241 2ms 1 Oct 2025 828th ReterikHub 279 310 199ms 17 Jan 2025 829th Mikey-Beep 🇬🇧 273 349 14ms 12 Aug 2025 830th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 831st arebbsba 269 296 10ms 9 Jan 2025 832nd benanlam 249 320 12ms 21 Dec 2025 833rd Msleizak 🇫🇷 206 226 325ms 19 May 2025 834th theEsteemed 154 606 339ms 14 hours ago 835th AidanWalter 148 540 10ms 1 Jan 2025 836th vkptimon 120 776 415ms 9 Jul 2025 837th bignamehyp 119 667 13ms 14 Nov 2024 838th dokutan 61 2,475 116ms 18 Aug 2025 839th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 840th lyphyser 0 15 74ms 25 May 2025 841st 2bular 0 16 76ms 22 Mar 2025 842nd darrenks 0 17 76ms 22 Mar 2025 843rd Natanaelel 🇸🇪 0 18 75ms 23 Mar 2025 844th plcc0 0 21 101ms 4 Apr 2025 844th namelessiw 0 21 150ms 19 Nov 2025 846th kg583 🇺🇸 0 25 271ms 8 Feb 2025 847th lyxal 🇦🇺 0 27 681ms 17 May 2025 848th themoonisacheese 0 35 632ms 13 Jun 2025 849th ovs-code 🇩🇪 0 54 4ms 9 Jul 2025 850th GrayJoKing 🇦🇺 0 55 4ms 13 Jul 2025 851st ovs-code 🇩🇪 0 58 2ms 13 Jul 2025 852nd AlephSquirrel 0 63 3ms 15 Jun 2025 853rd DialFrost 🇸🇬 0 68 11ms 4 Dec 2025 854th chunes3 🇺🇸 0 69 7ms 13 Feb 2025 855th maweowo 🇩🇪 0 70 4ms 2 Oct 2025 856th evnu 0 73 5ms 12 Oct 2025 857th commandblockguy 🇺🇸 0 74 5ms 10 days ago 858th ovs-code 🇩🇪 0 76 15ms 13 Jun 2025 859th sean-niemann 🇺🇸 0 80 59ms 29 Apr 2025 860th NicoBliss 0 84 11ms 10 days ago 861st KatieLG 🇬🇧 0 89 6ms 10 days ago 862nd albanian-laundromat 0 123 2ms 4 Jun 2025 863rd dokutan 0 138 8ms 9 days ago 864th edsrzf 🇳🇿 0 142 183ms 24 Jul 2025 865th MatthewF19 0 192 113ms 17 May 2025 866th dokutan 0 219 60ms 28 Jun 2025 First Prev 801–866 of 866
