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 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 Gray Code Decoder Gray Code Encoder 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 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 Gray Code Decoder Gray Code Encoder 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 801st snoozingnewt 🇨🇦 465 121 229ms 27 Nov 2025 802nd iczelia 🇩🇪 462 94 2ms 23 Sep 2025 803rd Jacob385 462 202 418ms 2 Oct 2024 804th navier-1 461 173 10ms 22 Sep 2025 805th madex 🇩🇪 460 104 37ms 2 Oct 2024 806th TheZwierzLF 🇵🇱 456 105 37ms 8 Jan 2026 807th snoozingnewt 🇨🇦 455 149 5ms 2 Nov 2025 808th IISResetMe 453 103 583ms 27 Nov 2025 809th clayboll99 453 176 10ms 10 Jul 2025 810th snoozingnewt 🇨🇦 452 96 2ms 2 Nov 2025 811th dokutan 451 63 3ms 26 Nov 2024 812th snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 813th muser-logiccpu 🇺🇦 450 177 18ms 9 Aug 2025 814th OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 815th dokutan 445 109 10ms 19 Oct 2024 816th grey0ut 444 105 435ms 11 Jan 2025 817th calum12345 443 180 10ms 26 Mar 2025 818th Yewzir 🇧🇪 442 171 12ms 26 Dec 2024 819th MyXoToD 🇩🇪 441 146 10ms 26 May 2025 820th CheeseCake628 🇳🇴 439 151 521ms 18 Oct 2025 821st zt14427 438 182 11ms 27 Dec 2024 822nd IoLimmer 436 183 10ms 10 Oct 2024 823rd varhammer 435 223 11ms 23 Feb 2025 824th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 825th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 826th snoozingnewt 🇨🇦 431 111 34ms 2 Nov 2025 827th estomagordo 🇳🇱 429 186 10ms 15 Jul 2025 828th dokutan 426 132 301ms 3 Oct 2024 829th JOrE20 424 136 1,020ms 7 Dec 2025 830th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 831st Arkadios200 417 196 101ms 21 Oct 2025 832nd aksyristos 411 172 2ms 23 Nov 2025 833rd snoozingnewt 🇨🇦 411 267 29ms 18 Dec 2025 834th Mabeloid 🇳🇴 405 159 9ms 12 Oct 2024 835th snoozingnewt 🇨🇦 404 223 96ms 2 Nov 2025 836th Ralac07 🇦🇺 398 162 11ms 3 Oct 2024 837th dieggsy 393 247 18ms 10 Oct 2024 838th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 839th snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 840th fischfood 385 176 5ms 22 Oct 2024 841st JOrE20 385 191 169ms 27 Jan 2026 842nd ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 843rd c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 844th KatieLG 🇬🇧 375 218 110ms 21 Nov 2025 845th RobGLambert 375 232 1,366ms 8 Jun 2025 846th RedzGoose 🇦🇺 371 187 114ms 2 Oct 2024 847th P1nk-P0nk 369 215 3ms 18 Oct 2024 848th gautambp 366 218 11ms 24 Jun 2025 849th snoozingnewt 🇨🇦 363 267 13ms 2 Nov 2025 850th denkyuu1 361 156 603ms 10 days ago 851st sciencejiho 358 197 2ms 11 Feb 2025 852nd The-Wolfson 355 230 102ms 16 Dec 2024 853rd Zhenyu-Bo 350 228 11ms 30 Jul 2025 854th EthanJantz 347 230 11ms 5 Sep 2025 855th RobGLambert 342 273 200ms 8 Jun 2025 856th Ernest1338 340 275 303ms 26 Oct 2024 857th noahhorlacher 337 191 10ms 7 Dec 2024 858th RobertBurs 336 237 10ms 22 Sep 2025 859th TJK-S 331 241 11ms 25 Oct 2025 859th NoneTheFewer 331 241 11ms 25 Dec 2025 861st JOrE20 314 389 56ms 4 Dec 2025 862nd te-chnical 309 258 219ms 4 May 2025 863rd snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 864th KatieLG 🇬🇧 300 290 2,545ms 1 Oct 2025 865th kasarino 294 240 2ms 8 Feb 2026 866th KatieLG 🇬🇧 293 241 2ms 1 Oct 2025 867th fantaize 283 330 198ms 9 days ago 868th ReterikHub 280 310 206ms 17 Jan 2025 869th Mikey-Beep 🇬🇧 273 349 16ms 12 Aug 2025 870th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 871st arebbsba 269 296 11ms 9 Jan 2025 872nd kasarino 267 299 11ms 8 Feb 2026 873rd kasarino 258 373 44ms 8 Feb 2026 874th benanlam 249 320 10ms 21 Dec 2025 875th Msleizak 🇫🇷 206 226 280ms 19 May 2025 876th theEsteemed 154 606 472ms 20 Jan 2026 877th AidanWalter 148 540 10ms 1 Jan 2025 878th bignamehyp 120 667 10ms 14 Nov 2024 879th vkptimon 120 776 422ms 9 Jul 2025 880th dokutan 61 2,475 116ms 18 Aug 2025 First Prev 801–880 of 911 Next Last