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 NFA Simulator 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 NFA Simulator 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 clayboll99 453 176 10ms 10 Jul 2025 752nd dokutan 451 63 3ms 26 Nov 2024 753rd snoozingnewt 🇺🇸 451 176 2ms 2 Nov 2025 754th Upload-and-View 🇺🇦 450 177 16ms 9 Aug 2025 755th varhammer 🇷🇺 450 223 12ms 23 Feb 2025 756th OSYCh314 🇦🇺 447 178 11ms 2 Nov 2024 757th dokutan 445 109 10ms 19 Oct 2024 758th grey0ut 444 105 415ms 11 Jan 2025 759th calum12345 443 180 10ms 26 Mar 2025 760th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 761st Yewzir 🇧🇪 440 171 11ms 26 Dec 2024 762nd CheeseCake628 🇳🇴 439 151 462ms 18 Oct 2025 763rd zt14427 438 182 10ms 27 Dec 2024 764th IoLimmer 435 183 9ms 10 Oct 2024 765th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 766th aksyristos 433 184 17ms 15 Nov 2024 767th KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 768th snoozingnewt 🇺🇸 430 111 36ms 2 Nov 2025 769th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 770th snoozingnewt 🇺🇸 426 268 28ms 2 Nov 2025 771st dokutan 425 132 288ms 3 Oct 2024 772nd MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 773rd Arkadios200 417 196 95ms 21 Oct 2025 774th aksyristos 409 172 2ms 9 days ago 775th dieggsy 406 247 21ms 10 Oct 2024 776th snoozingnewt 🇺🇸 406 313 45ms 2 Nov 2025 777th Mabeloid 🇳🇴 405 159 9ms 12 Oct 2024 778th snoozingnewt 🇺🇸 404 223 75ms 2 Nov 2025 779th Ralac07 🇦🇺 397 162 10ms 3 Oct 2024 780th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 781st fischfood 384 176 4ms 22 Oct 2024 782nd c0d3-4-F00d 🇩🇪 382 184 2ms 9 Jan 2025 783rd snoozingnewt 🇺🇸 379 286 41ms 2 Nov 2025 784th snoozingnewt 🇺🇸 376 267 13ms 2 Nov 2025 785th KatieLG 🇬🇧 375 218 112ms 11 days ago 786th RobGLambert 370 232 915ms 8 Jun 2025 787th RedzGoose 🇦🇺 369 187 102ms 2 Oct 2024 788th P1nk-P0nk 369 215 3ms 18 Oct 2024 789th gautambp 365 218 10ms 24 Jun 2025 790th sciencejiho 357 197 2ms 11 Feb 2025 791st The-Wolfson 355 230 98ms 16 Dec 2024 792nd Zhenyu-Bo 349 228 10ms 30 Jul 2025 793rd EthanJantz 346 230 10ms 5 Sep 2025 794th RobGLambert 342 273 200ms 8 Jun 2025 795th Ernest1338 339 275 275ms 26 Oct 2024 796th noahhorlacher 337 191 10ms 7 Dec 2024 797th RobertBurs 336 237 9ms 22 Sep 2025 798th TJK-S 331 241 11ms 25 Oct 2025 799th te-chnical 309 258 198ms 4 May 2025 800th snoozingnewt 🇺🇸 303 200 3ms 2 Nov 2025 801st KatieLG 🇬🇧 296 290 1,806ms 1 Oct 2025 802nd KatieLG 🇬🇧 292 241 2ms 1 Oct 2025 803rd ReterikHub 277 310 205ms 17 Jan 2025 804th Mikey-Beep 🇬🇧 273 349 25ms 12 Aug 2025 805th MeWhenI 🇻🇦 271 407 132ms 6 Oct 2024 806th arebbsba 269 296 11ms 9 Jan 2025 807th Msleizak 🇫🇷 206 226 243ms 19 May 2025 808th AidanWalter 148 540 10ms 1 Jan 2025 809th vkptimon 120 776 307ms 9 Jul 2025 810th bignamehyp 119 667 10ms 14 Nov 2024 811th dokutan 61 2,475 123ms 18 Aug 2025 812th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 813th lyphyser 0 15 80ms 25 May 2025 814th 2bular 0 16 76ms 22 Mar 2025 815th darrenks 0 17 78ms 22 Mar 2025 816th Natanaelel 🇸🇪 0 18 74ms 23 Mar 2025 817th plcc0 0 21 99ms 4 Apr 2025 817th namelessiw 0 21 150ms 13 days ago 819th kg583 🇺🇸 0 25 266ms 8 Feb 2025 820th lyxal 🇦🇺 0 27 494ms 17 May 2025 821st themoonisacheese 0 35 484ms 13 Jun 2025 822nd ovs-code 🇩🇪 0 54 4ms 9 Jul 2025 823rd GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 824th ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 825th AlephSquirrel 0 63 3ms 15 Jun 2025 First Prev 751–825 of 835 Next Last