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 🇨🇦 490 249 26ms 2 Nov 2025 802nd denkyuu1 489 115 277ms 5 days ago 803rd JunkIce 488 136 510ms 3 Dec 2024 803rd jusaka 488 136 516ms 3 days ago 805th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 806th Vaekor 483 165 11ms 15 Dec 2024 807th mitzal 483 180 70ms 9 Feb 2025 808th snoozingnewt 🇨🇦 482 173 377ms 2 Nov 2025 809th h-hh-hhh 🇺🇦 481 147 1ms 2 Nov 2024 810th MiffOttah 476 150 478ms 6 Oct 2024 810th mwarvik 🇳🇴 476 150 431ms 1 Jan 2026 812th alphafalfa 472 92 2ms 8 Nov 2024 813th JesseNoEyes 🇺🇸 472 169 11ms 1 Oct 2024 814th luca1339 472 198 425ms 4 Nov 2024 815th Maximizer02 471 201 12ms 1 Oct 2024 816th ejini6969 469 102 39ms 14 Jun 2025 817th jbjd 469 151 2ms 4 Feb 2026 818th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 819th snoozingnewt 🇨🇦 469 200 230ms 2 Nov 2025 820th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 821st snoozingnewt 🇨🇦 465 121 229ms 27 Nov 2025 822nd Jacob385 463 202 418ms 2 Oct 2024 823rd iczelia 🇩🇪 462 94 2ms 23 Sep 2025 824th navier-1 461 173 10ms 22 Sep 2025 825th madex 🇩🇪 460 104 37ms 2 Oct 2024 826th TheZwierzLF 🇵🇱 456 105 37ms 8 Jan 2026 827th snoozingnewt 🇨🇦 455 149 5ms 2 Nov 2025 828th IISResetMe 453 103 583ms 27 Nov 2025 829th clayboll99 453 176 10ms 10 Jul 2025 830th snoozingnewt 🇨🇦 452 96 2ms 2 Nov 2025 831st dokutan 451 63 3ms 26 Nov 2024 832nd snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 833rd muser-logiccpu 🇺🇦 451 177 18ms 9 Aug 2025 834th OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 835th dokutan 445 109 10ms 19 Oct 2024 836th grey0ut 444 105 435ms 11 Jan 2025 837th calum12345 443 180 10ms 26 Mar 2025 838th MyXoToD 🇩🇪 442 146 9ms 26 May 2025 839th Yewzir 🇧🇪 442 171 12ms 26 Dec 2024 840th CheeseCake628 🇳🇴 440 151 521ms 18 Oct 2025 841st zt14427 438 182 11ms 27 Dec 2024 842nd IoLimmer 436 183 10ms 10 Oct 2024 843rd KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 844th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 845th snoozingnewt 🇨🇦 431 111 34ms 2 Nov 2025 846th varhammer 431 223 11ms 23 Feb 2025 847th estomagordo 🇳🇱 429 186 10ms 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 17 hours ago 852nd Arkadios200 417 196 105ms 21 Oct 2025 853rd aksyristos 411 172 2ms 23 Nov 2025 854th snoozingnewt 🇨🇦 411 267 29ms 18 Dec 2025 855th Mabeloid 🇳🇴 405 159 9ms 12 Oct 2024 856th snoozingnewt 🇨🇦 404 223 96ms 2 Nov 2025 857th ComradeSquirrel 399 200 11ms 5 days ago 858th Ralac07 🇦🇺 398 162 11ms 3 Oct 2024 859th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 860th dieggsy 389 247 18ms 10 Oct 2024 861st snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 862nd fischfood 385 176 5ms 22 Oct 2024 863rd JOrE20 385 191 169ms 27 Jan 2026 864th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 865th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 866th KatieLG 🇬🇧 375 218 114ms 21 Nov 2025 867th RobGLambert 375 232 1,388ms 8 Jun 2025 868th RedzGoose 🇦🇺 371 187 114ms 2 Oct 2024 869th P1nk-P0nk 369 215 3ms 18 Oct 2024 870th gautambp 366 218 11ms 24 Jun 2025 871st snoozingnewt 🇨🇦 360 267 13ms 2 Nov 2025 872nd sciencejiho 359 197 2ms 11 Feb 2025 873rd The-Wolfson 355 230 110ms 16 Dec 2024 874th Zhenyu-Bo 350 228 11ms 30 Jul 2025 875th EthanJantz 347 230 11ms 5 Sep 2025 876th RobGLambert 344 273 198ms 8 Jun 2025 877th Inbarw100 342 207 2ms 34 hours ago 878th Ernest1338 341 275 300ms 26 Oct 2024 879th noahhorlacher 338 191 10ms 7 Dec 2024 880th RobertBurs 337 237 10ms 22 Sep 2025 First Prev 801–880 of 933 Next Last