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 Inbarw100 342 207 2ms 11 days ago 882nd Ernest1338 341 275 297ms 26 Oct 2024 883rd noahhorlacher 338 191 15ms 7 Dec 2024 884th RobertBurs 337 237 11ms 22 Sep 2025 885th jusaka 331 216 400ms 13 hours ago 886th TJK-S 331 241 12ms 25 Oct 2025 886th NoneTheFewer 331 241 11ms 25 Dec 2025 888th jusaka 325 150 12ms 10 hours ago 889th JOrE20 316 389 56ms 4 Dec 2025 890th te-chnical 309 258 222ms 4 May 2025 891st snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 892nd KatieLG 🇬🇧 300 290 2,606ms 1 Oct 2025 893rd kasarino 295 240 2ms 8 Feb 2026 894th KatieLG 🇬🇧 294 241 2ms 1 Oct 2025 895th jusaka 290 234 90ms 13 hours ago 896th jusaka 289 275 2ms 15 hours ago 897th fantaize 284 330 201ms 10 Mar 2026 898th ReterikHub 281 310 210ms 17 Jan 2025 899th jusaka 275 243 2,488ms 13 hours ago 900th jusaka 275 435 347ms 14 hours ago 901st Mikey-Beep 🇬🇧 273 349 16ms 12 Aug 2025 902nd jusaka 273 425 82ms 3 hours ago 903rd MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 904th arebbsba 269 296 10ms 9 Jan 2025 905th kasarino 267 299 11ms 8 Feb 2026 906th jusaka 261 205 10ms 9 hours ago 907th jusaka 261 271 3ms 14 hours ago 908th kasarino 260 373 44ms 8 Feb 2026 909th benanlam 249 320 12ms 21 Dec 2025 910th jusaka 249 336 399ms 12 hours ago 911th jusaka 243 421 4ms 11 hours ago 912th jusaka 242 507 29ms 11 hours ago 913th jusaka 239 309 204ms 11 hours ago 914th jusaka 233 388 90ms 13 hours ago 915th jusaka 230 309 5ms 10 hours ago 916th jusaka 227 361 148ms 13 hours ago 917th jusaka 224 254 1,457ms 12 hours ago 918th jusaka 223 163 63ms 7 hours ago 919th jusaka 216 446 25ms 10 hours ago 920th jusaka 213 225 38ms 15 hours ago 921st jusaka 212 575 45ms 10 hours ago 922nd jusaka 211 390 188ms 12 hours ago 923rd jusaka 207 189 34ms 7 hours ago 924th Msleizak 🇫🇷 206 226 262ms 19 May 2025 925th jusaka 199 556 29ms 12 hours ago 926th jusaka 194 467 1,371ms 13 hours ago 927th jusaka 192 488 224ms 13 hours ago 928th jusaka 185 366 6ms 13 hours ago 929th jusaka 184 307 249ms 12 hours ago 930th jusaka 180 387 110ms 13 hours ago 931st jusaka 177 365 11ms 16 hours ago 932nd jusaka 172 337 1,983ms 12 hours ago 933rd jusaka 172 450 131ms 12 hours ago 934th jusaka 170 512 1,460ms 14 hours ago 935th jusaka 169 985 1,436ms 11 hours ago 936th jusaka 168 415 3ms 4 hours ago 937th jusaka 167 568 10ms 12 hours ago 938th jusaka 161 246 3ms 15 hours ago 939th jusaka 156 244 140ms 10 hours ago 940th theEsteemed 154 606 407ms 20 Jan 2026 941st AidanWalter 148 540 11ms 1 Jan 2025 942nd jusaka 146 744 46ms 11 hours ago 943rd bignamehyp 120 667 11ms 14 Nov 2024 944th vkptimon 120 776 422ms 9 Jul 2025 945th jusaka 116 643 8ms 9 hours ago 946th dokutan 61 2,475 120ms 18 Aug 2025 947th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 948th lyphyser 0 15 32ms 25 May 2025 948th 2bular 0 15 34ms 14 Feb 2026 948th Natanaelel 🇸🇪 0 15 34ms 17 Feb 2026 951st darrenks 🇺🇸 0 16 33ms 14 Feb 2026 952nd plcc0 0 18 35ms 14 Feb 2026 953rd namelessiw 0 21 150ms 19 Nov 2025 954th kg583 🇺🇸 0 25 298ms 8 Feb 2025 955th lyxal 🇦🇺 0 27 775ms 17 May 2025 956th plcc0 0 30 97ms 31 Jan 2026 957th themoonisacheese 0 35 874ms 13 Jun 2025 957th jshholland 0 35 779ms 19 Feb 2026 959th ovs-code 🇩🇪 0 52 4ms 24 Jan 2026 960th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 First 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