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 Dragon Curve 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 Dragon Curve 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 MeWhenI 🇻🇦 502 149 54ms 4 Oct 2024 802nd webmiche 502 159 11ms 3 Nov 2025 803rd Mabeloid 🇳🇴 499 133 572ms 2 Oct 2024 804th CheeseCake628 🇳🇴 499 160 108ms 5 Nov 2024 805th pres-abhisheksinha 496 161 10ms 8 Oct 2024 806th HumanoidCPU 493 145 544ms 5 Oct 2024 807th snoozingnewt 🇨🇦 493 150 198ms 2 Nov 2025 808th CarterStroik 493 161 2ms 19 Nov 2025 809th snoozingnewt 🇨🇦 493 249 26ms 2 Nov 2025 810th owen-c-parker 🇺🇸 492 131 14ms 1 Oct 2024 811th ibixina 492 162 10ms 13 Oct 2024 811th TheAtrossian 492 162 13ms 5 Jan 2025 813th h-hh-hhh 🇺🇦 492 177 63ms 2 Nov 2024 814th zgialor-lab 489 163 18ms 5 days ago 815th JunkIce 488 136 581ms 3 Dec 2024 816th snoozingnewt 🇨🇦 487 117 1,631ms 2 Nov 2025 817th snoozingnewt 🇨🇦 485 173 411ms 2 Nov 2025 818th Vaekor 484 165 11ms 15 Dec 2024 819th mitzal 483 180 63ms 9 Feb 2025 820th h-hh-hhh 🇺🇦 482 147 1ms 2 Nov 2024 821st MiffOttah 477 150 506ms 6 Oct 2024 821st mwarvik 🇳🇴 477 150 446ms 1 Jan 2026 823rd alphafalfa 474 92 2ms 8 Nov 2024 824th Maximizer02 473 201 12ms 1 Oct 2024 825th JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 826th luca1339 472 198 414ms 4 Nov 2024 827th ejini6969 470 102 38ms 14 Jun 2025 828th jbjd 469 151 2ms 4 Feb 2026 829th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 830th snoozingnewt 🇨🇦 469 200 260ms 2 Nov 2025 831st ComputerKWasTaken 🇺🇸 467 171 11ms 14 Oct 2024 832nd snoozingnewt 🇨🇦 466 121 214ms 27 Nov 2025 833rd iczelia 🇩🇪 464 94 2ms 23 Sep 2025 834th Jacob385 463 202 424ms 2 Oct 2024 835th madex 🇩🇪 461 104 40ms 2 Oct 2024 836th navier-1 461 173 10ms 22 Sep 2025 836th ComradeSquirrel 461 173 10ms 5 days ago 838th TheZwierzLF 🇵🇱 457 105 37ms 8 Jan 2026 839th snoozingnewt 🇨🇦 455 149 5ms 2 Nov 2025 840th Arkadios200 455 180 130ms 11 days ago 841st snoozingnewt 🇨🇦 454 96 2ms 2 Nov 2025 842nd IISResetMe 454 103 488ms 27 Nov 2025 843rd clayboll99 453 176 11ms 10 Jul 2025 844th dokutan 451 63 3ms 26 Nov 2024 845th snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 846th muser-logiccpu 🇺🇦 451 177 18ms 9 Aug 2025 847th OSYCh314 🇦🇺 448 178 11ms 2 Nov 2024 848th dokutan 447 109 10ms 19 Oct 2024 849th grey0ut 446 105 464ms 11 Jan 2025 850th calum12345 443 180 11ms 26 Mar 2025 851st MyXoToD 🇩🇪 442 146 10ms 26 May 2025 852nd Yewzir 🇧🇪 442 171 14ms 26 Dec 2024 853rd CheeseCake628 🇳🇴 440 151 532ms 18 Oct 2025 854th zt14427 438 182 10ms 27 Dec 2024 855th IoLimmer 436 183 11ms 10 Oct 2024 856th KatieLG 🇬🇧 434 183 2ms 2 Oct 2025 857th varhammer 433 223 12ms 23 Feb 2025 858th snoozingnewt 🇨🇦 432 111 36ms 2 Nov 2025 859th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 860th estomagordo 🇳🇱 429 186 11ms 15 Jul 2025 861st dokutan 427 132 334ms 3 Oct 2024 862nd MeWhenI 🇻🇦 426 143 6ms 2 Oct 2024 863rd jusaka 426 201 26ms 9 days ago 864th JOrE20 425 136 1,039ms 7 Dec 2025 865th scpchicken 🇵🇼 419 91 160ms 20 days ago 866th jusaka 417 369 1,660ms 9 days ago 867th snoozingnewt 🇨🇦 415 267 28ms 18 Dec 2025 868th aksyristos 412 172 2ms 23 Nov 2025 869th Mabeloid 🇳🇴 406 159 11ms 12 Oct 2024 870th snoozingnewt 🇨🇦 406 223 96ms 2 Nov 2025 871st Ralac07 🇦🇺 398 162 14ms 3 Oct 2024 872nd jusaka 396 281 154ms 8 days ago 873rd snoozingnewt 🇨🇦 395 276 40ms 6 Dec 2025 874th dieggsy 391 247 19ms 10 Oct 2024 875th snoozingnewt 🇨🇦 390 313 40ms 2 Nov 2025 876th JOrE20 387 191 157ms 27 Jan 2026 877th ehulinsky 🇺🇸 386 158 5ms 2 Apr 2025 878th fischfood 386 176 5ms 22 Oct 2024 879th c0d3-4-F00d 🇩🇪 385 184 2ms 9 Jan 2025 880th KatieLG 🇬🇧 376 218 118ms 21 Nov 2025 First Prev 801–880 of 1,012 Next Last