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 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 Calendar 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 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 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 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 Calendar 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 751st ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 752nd snoozingnewt 🇨🇦 466 200 228ms 2 Nov 2025 753rd snoozingnewt 🇨🇦 464 121 200ms 18 days ago 754th Jacob385 462 202 358ms 2 Oct 2024 755th navier-1 461 173 11ms 22 Sep 2025 756th snoozingnewt 🇨🇦 460 96 2ms 2 Nov 2025 757th madex 🇩🇪 459 104 34ms 2 Oct 2024 758th snoozingnewt 🇨🇦 454 149 4ms 2 Nov 2025 759th IISResetMe 453 103 516ms 18 days ago 760th clayboll99 453 176 10ms 10 Jul 2025 761st dokutan 451 63 3ms 26 Nov 2024 762nd snoozingnewt 🇨🇦 451 176 1ms 2 Nov 2025 763rd Upload-and-View 🇺🇦 450 177 17ms 9 Aug 2025 764th varhammer 🇷🇺 450 223 11ms 23 Feb 2025 765th OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 766th dokutan 445 109 10ms 19 Oct 2024 767th grey0ut 444 105 425ms 11 Jan 2025 768th calum12345 443 180 10ms 26 Mar 2025 769th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 770th Yewzir 🇧🇪 440 171 12ms 26 Dec 2024 771st CheeseCake628 🇳🇴 439 151 426ms 18 Oct 2025 772nd zt14427 438 182 10ms 27 Dec 2024 773rd IoLimmer 435 183 9ms 10 Oct 2024 774th JOrE20 🇺🇸 434 136 754ms 8 days ago 775th KatieLG 🇬🇧 433 183 1ms 2 Oct 2025 776th aksyristos 433 184 16ms 15 Nov 2024 777th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 778th snoozingnewt 🇨🇦 430 111 33ms 2 Nov 2025 779th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 780th snoozingnewt 🇨🇦 426 268 27ms 2 Nov 2025 781st dokutan 425 132 288ms 3 Oct 2024 782nd MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 783rd Arkadios200 417 196 98ms 21 Oct 2025 784th aksyristos 409 172 2ms 22 days ago 785th dieggsy 406 247 18ms 10 Oct 2024 786th snoozingnewt 🇨🇦 406 313 40ms 2 Nov 2025 787th Mabeloid 🇳🇴 405 159 9ms 12 Oct 2024 788th snoozingnewt 🇨🇦 404 223 75ms 2 Nov 2025 789th Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 790th snoozingnewt 🇨🇦 392 276 40ms 9 days ago 791st ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 792nd fischfood 384 176 4ms 22 Oct 2024 793rd c0d3-4-F00d 🇩🇪 382 184 2ms 9 Jan 2025 794th snoozingnewt 🇨🇦 376 267 13ms 2 Nov 2025 795th KatieLG 🇬🇧 375 218 108ms 24 days ago 796th RobGLambert 372 232 948ms 8 Jun 2025 797th RedzGoose 🇦🇺 369 187 101ms 2 Oct 2024 798th P1nk-P0nk 369 215 3ms 18 Oct 2024 799th gautambp 365 218 11ms 24 Jun 2025 800th sciencejiho 357 197 2ms 11 Feb 2025 801st The-Wolfson 355 230 100ms 16 Dec 2024 802nd JOrE20 🇺🇸 354 208 120ms 8 days ago 803rd Zhenyu-Bo 349 228 10ms 30 Jul 2025 804th EthanJantz 346 230 10ms 5 Sep 2025 805th RobGLambert 342 273 183ms 8 Jun 2025 806th Ernest1338 339 275 265ms 26 Oct 2024 807th noahhorlacher 337 191 9ms 7 Dec 2024 808th RobertBurs 336 237 10ms 22 Sep 2025 809th TJK-S 331 241 10ms 25 Oct 2025 810th JOrE20 🇺🇸 312 389 56ms 11 days ago 811th te-chnical 309 258 215ms 4 May 2025 812th snoozingnewt 🇨🇦 303 200 3ms 2 Nov 2025 813th NoneTheFewer 302 264 11ms 6 days ago 814th KatieLG 🇬🇧 297 290 1,990ms 1 Oct 2025 815th KatieLG 🇬🇧 292 241 2ms 1 Oct 2025 816th ReterikHub 278 310 205ms 17 Jan 2025 817th Mikey-Beep 🇬🇧 273 349 14ms 12 Aug 2025 818th MeWhenI 🇻🇦 271 407 119ms 6 Oct 2024 819th arebbsba 269 296 10ms 9 Jan 2025 820th Msleizak 🇫🇷 206 226 294ms 19 May 2025 821st AidanWalter 148 540 10ms 1 Jan 2025 822nd vkptimon 120 776 415ms 9 Jul 2025 823rd bignamehyp 119 667 13ms 14 Nov 2024 824th dokutan 61 2,475 123ms 18 Aug 2025 825th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 First Prev 751–825 of 848 Next Last