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 801st snoozingnewt 🇨🇦 490 150 198ms 2 Nov 2025 802nd snoozingnewt 🇨🇦 490 249 26ms 2 Nov 2025 803rd JunkIce 488 136 581ms 3 Dec 2024 804th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 805th Vaekor 483 165 11ms 15 Dec 2024 806th mitzal 483 180 61ms 9 Feb 2025 807th snoozingnewt 🇨🇦 482 173 377ms 2 Nov 2025 808th h-hh-hhh 🇺🇦 481 147 1ms 2 Nov 2024 809th MiffOttah 476 150 428ms 6 Oct 2024 809th mwarvik 🇳🇴 476 150 431ms 1 Jan 2026 811th alphafalfa 472 92 2ms 8 Nov 2024 812th JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 813th luca1339 472 198 425ms 4 Nov 2024 814th Maximizer02 471 201 12ms 1 Oct 2024 815th ejini6969 470 102 38ms 14 Jun 2025 816th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 817th snoozingnewt 🇨🇦 469 200 230ms 2 Nov 2025 818th jbjd 468 151 2ms 4 Feb 2026 819th ComputerKWasTaken 🇺🇸 466 171 11ms 14 Oct 2024 820th snoozingnewt 🇨🇦 465 121 219ms 27 Nov 2025 821st iczelia 🇩🇪 462 94 2ms 23 Sep 2025 822nd Jacob385 462 202 411ms 2 Oct 2024 823rd madex 🇩🇪 461 104 37ms 2 Oct 2024 824th navier-1 461 173 10ms 22 Sep 2025 825th TheZwierzLF 🇵🇱 456 105 37ms 8 Jan 2026 826th snoozingnewt 🇨🇦 455 149 4ms 2 Nov 2025 827th IISResetMe 453 103 583ms 27 Nov 2025 828th clayboll99 453 176 11ms 10 Jul 2025 829th snoozingnewt 🇨🇦 452 96 2ms 2 Nov 2025 830th dokutan 451 63 3ms 26 Nov 2024 831st snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 832nd muser-logiccpu 🇺🇦 451 177 18ms 9 Aug 2025 833rd OSYCh314 🇦🇺 448 178 11ms 2 Nov 2024 834th dokutan 445 109 10ms 19 Oct 2024 835th grey0ut 444 105 402ms 11 Jan 2025 836th calum12345 443 180 11ms 26 Mar 2025 837th MyXoToD 🇩🇪 442 146 11ms 26 May 2025 838th Yewzir 🇧🇪 442 171 12ms 26 Dec 2024 839th CheeseCake628 🇳🇴 439 151 532ms 18 Oct 2025 840th zt14427 438 182 10ms 27 Dec 2024 841st IoLimmer 436 183 11ms 10 Oct 2024 842nd KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 843rd snoozingnewt 🇨🇦 432 111 34ms 2 Nov 2025 844th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 845th varhammer 431 223 12ms 23 Feb 2025 846th Arkadios200 430 190 111ms 45 hours ago 847th estomagordo 🇳🇱 429 186 11ms 15 Jul 2025 848th dokutan 426 132 301ms 3 Oct 2024 849th JOrE20 424 136 1,075ms 7 Dec 2025 850th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 851st scpchicken 🇵🇼 418 91 160ms 5 days ago 852nd aksyristos 411 172 2ms 23 Nov 2025 853rd snoozingnewt 🇨🇦 411 267 28ms 18 Dec 2025 854th Mabeloid 🇳🇴 405 159 14ms 12 Oct 2024 855th snoozingnewt 🇨🇦 404 223 96ms 2 Nov 2025 856th ComradeSquirrel 399 200 11ms 10 days ago 857th Ralac07 🇦🇺 398 162 11ms 3 Oct 2024 858th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 859th dieggsy 389 247 19ms 10 Oct 2024 860th snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 861st fischfood 385 176 5ms 22 Oct 2024 862nd JOrE20 385 191 157ms 27 Jan 2026 863rd ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 864th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 865th KatieLG 🇬🇧 375 218 112ms 21 Nov 2025 866th RobGLambert 375 232 1,395ms 8 Jun 2025 867th RedzGoose 🇦🇺 371 187 109ms 2 Oct 2024 868th P1nk-P0nk 369 215 3ms 18 Oct 2024 869th gautambp 366 218 11ms 24 Jun 2025 870th snoozingnewt 🇨🇦 360 267 13ms 2 Nov 2025 871st sciencejiho 359 197 2ms 11 Feb 2025 872nd The-Wolfson 355 230 110ms 16 Dec 2024 873rd Zhenyu-Bo 350 228 11ms 30 Jul 2025 874th EthanJantz 347 230 12ms 5 Sep 2025 875th RobGLambert 344 273 198ms 8 Jun 2025 876th Inbarw100 342 207 2ms 6 days ago 877th Ernest1338 341 275 297ms 26 Oct 2024 878th noahhorlacher 338 191 10ms 7 Dec 2024 879th RobertBurs 337 237 11ms 22 Sep 2025 880th TJK-S 331 241 12ms 25 Oct 2025 First Prev 801–880 of 932 Next Last