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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL 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 ><> ALGOL 68 ArkScript 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 APL 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 881st RobGLambert 344 273 198ms 8 Jun 2025 882nd Inbarw100 342 207 2ms 12 days ago 883rd Ernest1338 341 275 297ms 26 Oct 2024 884th noahhorlacher 338 191 15ms 7 Dec 2024 885th RobertBurs 337 237 11ms 22 Sep 2025 886th jusaka 331 216 400ms 21 hours ago 887th TJK-S 331 241 12ms 25 Oct 2025 887th NoneTheFewer 331 241 11ms 25 Dec 2025 889th jusaka 325 150 12ms 18 hours ago 890th JOrE20 316 389 56ms 4 Dec 2025 891st te-chnical 309 258 222ms 4 May 2025 892nd snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 893rd KatieLG 🇬🇧 300 290 2,606ms 1 Oct 2025 894th kasarino 295 240 2ms 8 Feb 2026 895th KatieLG 🇬🇧 294 241 2ms 1 Oct 2025 896th jusaka 290 234 90ms 21 hours ago 897th jusaka 289 275 2ms 23 hours ago 898th fantaize 284 330 201ms 10 Mar 2026 899th ReterikHub 281 310 210ms 17 Jan 2025 900th jusaka 275 243 2,488ms 21 hours ago 901st jusaka 275 435 347ms 22 hours ago 902nd Mikey-Beep 🇬🇧 273 349 16ms 12 Aug 2025 903rd jusaka 273 425 82ms 11 hours ago 904th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 905th arebbsba 269 296 10ms 9 Jan 2025 906th kasarino 267 299 11ms 8 Feb 2026 907th jusaka 261 205 10ms 17 hours ago 908th jusaka 261 271 3ms 22 hours ago 909th kasarino 260 373 44ms 8 Feb 2026 910th benanlam 249 320 12ms 21 Dec 2025 911th jusaka 249 336 399ms 20 hours ago 912th jusaka 243 421 4ms 19 hours ago 913th jusaka 242 507 29ms 19 hours ago 914th jusaka 239 309 204ms 20 hours ago 915th jusaka 233 388 90ms 21 hours ago 916th jusaka 230 309 5ms 18 hours ago 917th jusaka 229 280 153ms 7 hours ago 918th jusaka 227 361 148ms 21 hours ago 919th jusaka 224 254 1,457ms 20 hours ago 920th jusaka 223 163 63ms 16 hours ago 921st jusaka 216 446 25ms 18 hours ago 922nd jusaka 213 225 38ms 23 hours ago 923rd jusaka 212 575 45ms 18 hours ago 924th jusaka 211 390 188ms 20 hours ago 925th jusaka 207 189 34ms 15 hours ago 926th Msleizak 🇫🇷 206 226 262ms 19 May 2025 927th jusaka 199 556 29ms 20 hours ago 928th jusaka 194 467 1,371ms 21 hours ago 929th jusaka 192 488 224ms 22 hours ago 930th jusaka 188 286 81ms 6 hours ago 931st jusaka 186 449 8ms 7 hours ago 932nd jusaka 185 366 6ms 21 hours ago 933rd jusaka 184 307 249ms 21 hours ago 934th jusaka 180 387 110ms 21 hours ago 935th jusaka 177 365 11ms 24 hours ago 936th jusaka 172 337 1,983ms 20 hours ago 937th jusaka 172 450 131ms 20 hours ago 938th jusaka 170 512 1,460ms 22 hours ago 939th jusaka 169 985 1,436ms 19 hours ago 940th jusaka 168 415 3ms 12 hours ago 941st jusaka 167 568 10ms 20 hours ago 942nd jusaka 161 246 3ms 23 hours ago 943rd jusaka 156 244 140ms 18 hours ago 944th theEsteemed 154 606 407ms 20 Jan 2026 945th AidanWalter 148 540 11ms 1 Jan 2025 946th jusaka 146 744 46ms 19 hours ago 947th bignamehyp 120 667 11ms 14 Nov 2024 948th vkptimon 120 776 422ms 9 Jul 2025 949th jusaka 116 643 8ms 17 hours ago 950th dokutan 61 2,475 120ms 18 Aug 2025 951st iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 952nd lyphyser 0 15 32ms 25 May 2025 952nd 2bular 0 15 34ms 14 Feb 2026 952nd Natanaelel 🇸🇪 0 15 34ms 17 Feb 2026 955th darrenks 🇺🇸 0 16 33ms 14 Feb 2026 956th plcc0 0 18 35ms 14 Feb 2026 957th namelessiw 0 21 150ms 19 Nov 2025 958th kg583 🇺🇸 0 25 298ms 8 Feb 2025 959th lyxal 🇦🇺 0 27 775ms 17 May 2025 960th plcc0 0 30 97ms 31 Jan 2026 First Prev 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