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 dokutan 451 63 3ms 26 Nov 2024 752nd snoozingnewt 🇺🇸 451 176 2ms 2 Nov 2025 753rd Upload-and-View 🇺🇦 450 177 16ms 9 Aug 2025 754th varhammer 🇷🇺 450 223 12ms 23 Feb 2025 755th OSYCh314 🇦🇺 447 178 11ms 2 Nov 2024 756th dokutan 445 109 10ms 19 Oct 2024 757th grey0ut 444 105 415ms 11 Jan 2025 758th calum12345 443 180 10ms 26 Mar 2025 759th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 760th Yewzir 🇧🇪 440 171 12ms 26 Dec 2024 761st CheeseCake628 🇳🇴 439 151 453ms 18 Oct 2025 762nd zt14427 438 182 11ms 27 Dec 2024 763rd IoLimmer 435 183 11ms 10 Oct 2024 764th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 765th aksyristos 433 184 16ms 15 Nov 2024 766th KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 767th snoozingnewt 🇺🇸 430 111 36ms 2 Nov 2025 768th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 769th snoozingnewt 🇺🇸 426 268 28ms 2 Nov 2025 770th dokutan 425 132 288ms 3 Oct 2024 771st MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 772nd Arkadios200 417 196 95ms 21 Oct 2025 773rd aksyristos 409 172 2ms 8 days ago 774th dieggsy 406 247 21ms 10 Oct 2024 775th snoozingnewt 🇺🇸 406 313 45ms 2 Nov 2025 776th Mabeloid 🇳🇴 405 159 9ms 12 Oct 2024 777th snoozingnewt 🇺🇸 404 223 76ms 2 Nov 2025 778th Ralac07 🇦🇺 397 162 10ms 3 Oct 2024 779th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 780th fischfood 384 176 4ms 22 Oct 2024 781st c0d3-4-F00d 🇩🇪 382 184 2ms 9 Jan 2025 782nd snoozingnewt 🇺🇸 379 286 41ms 2 Nov 2025 783rd snoozingnewt 🇺🇸 376 267 13ms 2 Nov 2025 784th KatieLG 🇬🇧 375 218 112ms 10 days ago 785th RobGLambert 370 232 915ms 8 Jun 2025 786th RedzGoose 🇦🇺 369 187 102ms 2 Oct 2024 787th P1nk-P0nk 369 215 3ms 18 Oct 2024 788th gautambp 365 218 10ms 24 Jun 2025 789th sciencejiho 357 197 2ms 11 Feb 2025 790th The-Wolfson 355 230 98ms 16 Dec 2024 791st Zhenyu-Bo 349 228 14ms 30 Jul 2025 792nd EthanJantz 346 230 10ms 5 Sep 2025 793rd RobGLambert 342 273 200ms 8 Jun 2025 794th Ernest1338 339 275 275ms 26 Oct 2024 795th noahhorlacher 337 191 10ms 7 Dec 2024 796th RobertBurs 336 237 10ms 22 Sep 2025 797th TJK-S 331 241 9ms 25 Oct 2025 798th te-chnical 309 258 193ms 4 May 2025 799th snoozingnewt 🇺🇸 303 200 3ms 2 Nov 2025 800th KatieLG 🇬🇧 296 290 1,806ms 1 Oct 2025 801st KatieLG 🇬🇧 292 241 2ms 1 Oct 2025 802nd ReterikHub 277 310 205ms 17 Jan 2025 803rd Mikey-Beep 🇬🇧 273 349 25ms 12 Aug 2025 804th MeWhenI 🇻🇦 271 407 132ms 6 Oct 2024 805th arebbsba 269 296 12ms 9 Jan 2025 806th Msleizak 🇫🇷 206 226 243ms 19 May 2025 807th AidanWalter 148 540 9ms 1 Jan 2025 808th vkptimon 120 776 307ms 9 Jul 2025 809th bignamehyp 119 667 9ms 14 Nov 2024 810th dokutan 61 2,475 124ms 18 Aug 2025 811th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 812th lyphyser 0 15 80ms 25 May 2025 813th 2bular 0 16 76ms 22 Mar 2025 814th darrenks 0 17 78ms 22 Mar 2025 815th Natanaelel 🇸🇪 0 18 74ms 23 Mar 2025 816th plcc0 0 21 99ms 4 Apr 2025 816th namelessiw 0 21 150ms 12 days ago 818th kg583 🇺🇸 0 25 266ms 8 Feb 2025 819th lyxal 🇦🇺 0 27 494ms 17 May 2025 820th themoonisacheese 0 35 484ms 13 Jun 2025 821st ovs-code 🇩🇪 0 54 4ms 9 Jul 2025 822nd GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 823rd ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 824th AlephSquirrel 0 63 3ms 15 Jun 2025 825th DialFrost 🇸🇬 0 67 11ms 13 Feb 2025 First Prev 751–825 of 834 Next Last